James R. Strickland, Author
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04/06/2018 04:13pm Blog Entry

Ebikin' it 6: Wheels within Wheels

The time has come to talk about wheels. I said, way back in Ebikin' it 2, that my existing wheels were doing the job without complaint. Well, that's no longer true. I've had more than half the spokes on the drive side of my rear wheel fail, one or two at a time.

What does this mean? Well, I reached out to Jeff who built the bike, and he assures me he never got into building wheelsets, so I really have no idea how old these spokes are. If we assume the rims were built into this wheelset when they were new, these spokes go back to the early 1990s. And they're on mountain bike rims. It's not unreasonable that they are just fatiguing out, especially with the sudden increase in load (me) and rotational stress (the motor.) This was my thought process up to last week. Then, in the process of re-truing the wheel, I took all the tension off it and had a look at the shape the rim would prefer to be.

It was kind of like a potato chip. Not especially round, and in no way true. That, and the tension map I get when I measure the spokes when the thing IS true(ish) tell me that this rim is pretty much toast, alas.

My local bike shop assures me that 26 inch wheels, except for mountain bike downhillers, are pretty much extinct. This... isn't quite the case. As it happens, 26 inch wheels are also favored by the cargo bike and touring bike crowds, and they're fairly common in ebike circles as well. You just have to find them. Well, I have the Internet. The world is my shopping mall.

What I read is that standard wheels, if there are such things, assume a rider in the 150 pound range. My rims, being (in their day) hardcore mountain bike rims, apparently are good for somewhat more than that. The rims I ordered (from a bike shop in Germany, since Ryde's American rep doesn't answer his/her/it's email) are these: https://www.ryde.nl/andra-40. They were recommended on a touring bike forum, where in addition to the 150 pound rider, the bike can expect to support another 50 to 100 pounds of gear, plus a heavy, durable bike. These rims are rated at for a system weight (rider+bike+gear) of 180kg, or about 390lbs. That's more than sufficient. They're also designed with ebikes in mind. And as high class rims go, they're cheap at about 30 bucks each. Plus shipping. From Germany. Still cheaper than most of the rims I was looking at in the U.S.

For hubs, it should surprise no-one that I'm getting Sturmey-Archer drum-brake hubs. I've talked about them before. Here's the thing. Ever since I've been using them (which was when I was in my single digts) I've //hated// rim brakes. Always out of adjustment, lousy when wet, and if your wheel isn't exactly perfectly true, they drag, or you have to adjust them so loose they don't work very well.  I like disk brakes fine on cars, where they're protected from the elements by the car's wheel. On bikes, they're right out there in the open, where they get dirty and (worse) greasy, and stop working reliably.  I don't especially want to wash my bike every time I ride it. Doubly so for the brakes.

Sturmey-Archer drum brakes are internal. The weather doesn't get in. There are a lot of varying reviews on how well they stop, from one guy who bent his front fork in an emergency stop with his 90mm S-A front drum, to people who say they don't work well. I used drum brakes on my first car with reasonable success, and unlike 1968 VW brakes, the S-A ones are self-adjusting. I have a suspicion that either some people's brake handles don't work well with S-A drum brakes, or that S-A's included cables are a bit too compressable. I suppose I'll find out. I have a 90mm S-A front brake+hub and a 70mm rear brake+hub+cassette coming for my new wheelset.

Yep. I'm building new wheels. Meantime I'm keeping the old ones cobbled together (the front is no trouble at all) so I don't have to do wheel building my first time on an "emergency" basis. I'm starting to understand why people keep more than one bike around. I'm not sure I'm ready to build up a second ebike for myself though.

Okay, I'd //love// to build another ebike, now that I have the tools and (some of) the knowhow, but it remains to be seen whether anyone I know will ask me to. So far, no bueno.

I'll keep y'all posted on the wheel building. Should be fun. :P


04/01/2018 09:09pm Blog Entry

Ebikin' it 5


This is a post about degreasing. Not the bicycle, even though my ebike's drivetrain is, let's say, thoroughly greased and oiled, This is about degreasing oneself after working on such a bike.

For guys, at least, the tried and true methods (Boraxo or Lava soap) involve heavy abrasives. This is fine for your hands, but somehow in the process of retruing my rear wheel (again) and replacing the tube after the old one failed (yes, Friday's ride had extra entertainment) I got a sprocket print on my armpit. I was wearing a t-shirt, too. With sleeves. Anyway, Boraxo and Lava (besides not being present in our home) are //rough// on your skin. Like sand it down to the raw, bleeding dermis rough. Not doing that to my armpit, sorry.

Now, back in the day (way back) I did theater. So I can expound with personal experience to the effectiveness of old school cold cream. If you're patient, apply it with care, and scrub carefully, it still utterly fails to do anything useful except give you acne. So what's a bike tinkerer to do?

I am fortunate (for this and many other reasons) to have an SO who does, on occasion, wear eye makeup. She is also not one to tolerate traditional "female" tools that don't work, like cold cream. No. She buys this stuff:  King Soopers Eye Makeup Remover. It's the store brand of a whole family of biphasic (you have to shake it up or it separates) makeup removers. Most of the major brands have a version. This one is cheaper. Friends and neighbors, this stuff works. Not just on makeup, but it //dissolves// grease off your skin like nothing you've ever seen. Shake it up, apply to your greasy hide with Kleenex or paper towel or a cotton ball, and the grease //just comes off//. The skin is not brutalized underneath. This stuff is for eyelids, for Pete's sake. (So was cold cream. Word to the wise, don't get cold cream in your eyes. It stings.  A lot.).

So many thanks to my sweetie, who not only pointed this stuff out to me, but graciously doesn't make me buy my own bottle. Seriously. Try this stuff. It does the job.


01/29/2018 02:01pm Blog Entry

E-bikin' 4

Re-reading my original E'bikin' post, I thought I should bring things up to date a little.

1. Fuses:  I emailed the good folks at Luna about whether or not the battery pack (henceforth "the pack") is overload protected by the charge controller. They assured me it is. So fuses aren't necessary. Which is kind of too bad, since I'd already gotten my hands on some marine DC breakers for quite a reasonable price (when you start pricing fuses that will handle 25 amps at 48v DC, the prices get shocking. Breakers at $12.50 each make more sense.)  I got mine here: https://greatlakesskipper.com/, if you're building a pack that is not as well protected. I haven't used the breakers, but I'd happily deal with Great Lakes Skipper again.

2. Wheel life: So far, no problems with the wheels, knock on stainless-steel spokes. The brakes are adequate, but I'm still thinking about drum brakes and lacing my own wheels.

3. Lights: After some effort designing a box that would clamp onto my bike (which was not 100% successful) I 3d printed a switch box, patched a second output into the main pack's connector, and wired in one of these: https://www.superbrightleds.com/moreinfo/led-light-pods/10w-mini-aux-2in-modular-led-off-road-work-light/1699/ And a 48v tail light from Luna that they don't sell anymore. Very happy with both. I don't ride at night, but dusk comes early in the winter, and I didn't want to get squashed. Also didn't want to blind oncoming drivers, so I went with roughly the same lumens as a car headlight. Since I put that kit together, Luna has added a whole bunch of 48-72 volt head and tail lights to their "Lights" section, so if you're lighting your own bike, you might not have to shop as much as I did.

4. Cranks: There is a distinct *clunk* coming out of the crank end of my drivetrain. Reading up, I found that the alloy that Bafang makes their cranks out of is pretty soft, (frequently described as "like chocolate" and assumed I had either a wallowed out connector or a stripped thread on the pedal. I //have// a set of cranks that Shimano made for their own ebikes (same length, same ends) but have not installed them. I need to investigate further, as I now thing it could just be the front ratchet engaging that I'm feeling.

5. Retightening, Oiling, etc.:  I've been hard at work on a book, which I hope to finish the primary writing of shortly, so I haven't had time to do much (any) maintenance on my bike.  I have a set of Luna's sockets for the job coming, and a brand new pair of (cheap) torque wrenches, so I can torque things up properly as part of the upcoming break-in maintenance. I have about 70 miles on the bike now. It's probably time. I should probably get some loc-tite too. I've read that it's a good idea to lube the BBS02's reduction gears, so I should investigate that too. Mine aren't noisy, especially, but I read that the lubrication on them can be dodgy from the factory, and they last a whole lot longer if they're properly lubed. 

6. According to the Denver Post, the advisory panel to Boulder County has recommended banning ebikes from most of their parks and open-space trails. I have heard, though not from an especially reliable source, that this is due to //noise.// Seriously? I don't hear that well, but my tires and breathing make more noise to me than my bike motor. Hopefully the county will reject that as ridiculous. One more reason not to live in Boulder.  I have no use for political extremists of any sort, including the environmental flavor.

That's my update. Now off to //ride// the bike and get to work.

12/29/2017 09:48pm Blog Entry

4k Monitors, DPI, and Linux

A couple weeks ago, I got my first 4k monitor and hooked it up to my systems. The mac tolerates it (barely, at 30hz instead of 60.) The Linux machine... has been a struggle. So here are my collected hints. Bear in mind, my system is Xubuntu, at least for the moment.

1. Make sure you're getting the full resolution at 60Hz, assuming your video system can do that. I had to switch from a single link HDMI cable to a DVI cable.

2. The print gets really small. Set your font DPI (Settings, Appearance, Fonts). For my monitor, a 28 inch diagonal, at 3480x2160, that DPI works out to 157. There are calculators online.

3. Some applications still have tiny print? Like most especially LibreOffice, where the benighted fools took scaling //out// of the code this version? There's a trick. See, at least with XFCE's settings system, it doesn't propagate your new DPI to the X server itself, and Libreoffice gets its DPI settings from the xserver, not your desktop manager. Edit your .Xsettings or .Xdefaults file (whichever you feed to xrdb) and add this line:


(where 157 is whatever you set your DPI to previously.) Save, log out and back in, and libre office should behave itself properly.

I also have a multi-GPU setting and I keep getting kernel panics at startup (but not all the time). Some kind of race condition is happening, and I think the Nouveau drivers are being naughty (even though they're not supposed to be involved at all.) But that's a different struggle


12/07/2017 12:09am Blog Entry

E-Bikin' 3

So I've been riding every day or two for a while now. More observations:

1. Lights. It gets dark //early//. I have circuit breakers on order and lights already installed on the bike. I'll put up another post when I have everything working. Or I've set the bike on fire.

2. I finally found a situation where my brakes were a little bit inadequate. There are some fairly steep walking/bike trails around here. I'd never tried them before when I was on lung power only, and even with the boost at full power (750 watts) my legs were burning quite a bit by the time I got to the top. Then, of course, I had to get down.  On a dirt trail, 15-20MPH seems a lot faster than it does on the road. I had enough brake to slow down, but I had to use some front brake, which I normally shy away from doing. (Too many trips over the handlebars). If I'd needed to stop in a hurry, I might have been in trouble. This isn't my usual riding pattern, so it's not urgent to do the brakes. But like I said before. If the wheels give me grief and I have to build new ones, drum brakes for me.

3. When it's freezing out, wear some freakin' gloves. Even at a placid 14MPH, my fingers were going numb where they stuck out of my riding gloves. I need to investigate cold weather gear that's appropriate to biking if I'm going to keep doing this on cold days.

4. It's STILL fun. :)


11/14/2017 08:25pm Blog Entry

Ebikin' 2

11/12/2017 04:41pm Blog Entry


For some years (nearly 20, in fact) I've owned a late 1980s Specialized Rockhopper. For those too young to remember, these were early mountain bikes. Steel frames, no suspension, designed for durability rather than super-light-weight. I've been riding it, because after sitting and writing for hours at a time, my back is very appreciative of balancing a bike.

The problem was endurance. Let's face it, I'm not a small man, and I haven't been a regular biker since the early 1990s, when I was 20some years younger and there was considerably less of me. Also, I live on a pretty significant hill. So I'd get out, get going nicely (down the hill), go once around the block, and by the time I got up the hill again, my lungs basically wanted to climb out of my chest. No problem with legs, just... no wind. One trip around the block, a bit less than a mile, and about 10 minutes, and I was done for the day.

That's no way to build endurance.

So back in July, I ran across GoodTurn cycles. These guys. I took a test ride on a few ebikes, gawked at the price (they sell nice - expensive - bikes) but... I was interested. By August, I'd dragged M, my very patient sweetheart, to come rent a pair of their bikes and go for a ride.

Hint. When you rent their bikes, if you are of size, don't let them stick you with one of the ones with seat post suspension. Those things are worse than useless if the springs can't hold you up.

Still, we had a nice ride, marred only when M fell and scraped her knee. (She's fine. It was, as she says, a booboo.)

Fast forward to this past Friday, November 10th. Combine existing Rockhopper with a Banfang BBS02 750 watt kit as sold by Lunacycle (these guys) and a //lot// of replacement parts, and I have a working ebike.  I took it for its first test ride today, around the same route I'd been riding before without power. Twice. Plus, I explored my neighborhood a little, too. More hills. 3.8 miles seems like a pleasant workout. Legs and lungs are in full agreement that it's plenty for one day.

First, at no time did I feel that Colorado's 20mph absolute boost speed limit was inappropriate. (You can go faster, but you have to do it on your own power, not the motor's.) So setting the BBS02's limiter to 20 doesn't bother me. Result: my bike is a legitimate class 2 ebike. 750 watts, pedelec control + a throttle.

Second, anyone who tells you that you don't get a workout riding an ebike hasn't ridden one. A full horsepower (750 watts) isn't //that// much. It's not a motorcycle. It's a bicycle with some help.

Third, anyone who tells you that you don't need gears on an ebike lives where you don't need gears anyway. Or they weigh 150 pounds. Or they have a multi-kilowatt ebike, which is just plain illegal here. Or they're idiots. Let me assure you, I used all 7 of my remaining gears on my ride. (The BBS02 replaces your bottom bracket, cranks, and chain rings, and only provides one chain ring.)

Fourth,  I recommend a throttle. I recommend a throttle, because there are times when you need to get the bike moving, be it up a hill or across an intersection when you have limited time before the cars come to squash you, and being able to just twist for power is a godsend. Especially if you forgot to shift down when you came to a stop.

Fifth, having built my own ebike, I have to say this. If all you want is an ebike, and you don't already have a bike you're fond of, you're probably better off buying a pre-built one. In the intervening months, the prices of ebikes have dropped dramatically, to the point where, for the cost of a good steel bike to start from, plus the kit, you can buy one.
I'm also not at all sure I'd build one around an 80s bike again either. The 1989 Rockhopper has been an unending pain in the ass to find parts for. Bikes have evolved hugely in the intervening years, both in terms of improvements and manufacturing convenience. 1 inch quill headsets, 130 (or so) mm hub widths, 26 inch rims, 7 speed cassettes, and so on cost me a lot of time and difficulty in replacements that I wouldn't have had with a newer bike. And to be honest, I'm still lucky. My Rockhopper was put together out by my old trainer in Colorado Springs (Hi Jeff!) who was (probably still is) a mountain bike racer. So I have far, far better rims than the stock ones, and they hold up under my weight and the added weight and stress of the motor and battery.  Everything was put together well, greased, done with the right tools, and so on.  (Note the past tense verb. As a bike mechanic, I'm still a hack.)

Now. In fairness to myself and the bike, I also have to say I didn't //just// want an ebike. I wanted a project I could tinker with mechanically. It was this or a dead VW engine, and the bike takes less garage space. I wanted to mess around with electric vehicles. It was this or a Tesla... haha no. It was this or do without.  Also, many ebikes have weight limits, and the moment I sat on one of them, I'd have voided the warranty.   So building my own was (probably) the rational choice. And I have to say I'm pretty proud of the result. It looks ghetto, and it is, but it does the job quite well so far.

Suppliers: I'm somewhat ambivalent about Lunacycle. On the one hand, they're selling the Bafang kits for the same price you can mail order them from China, and they've (presumably) paid the import duties and they (presumably) support the warranty. They also carry spare parts. Awesome. On the down side, when my charger was backordered, they didn't bother telling me, nor have there been //any// instructions or documentation, including about the warranty. Also, while my order was in progress, they started a promotion for a free upgrade to a color display. They didn't upgrade me and didn't tell me. I got what I ordered, so I don't feel like I was ripped off or anything, but it would have been nice if they'd thrown one in.  I'm sure that in person they're a great, knowledgeable ebike shop, but their mail order business is probably swamped, and as a result it comes across as sketchier than it probably is. Still. Way more comfortable than ordering from China for a $750 kit. If I wind up building another ebike, I'll probably pony up to them again. At least I know them.

***Correction. The documentation section on Lunacycle's website is here: https://lunacycle.com/documentation***

 I'm also a little ambivalent toward my local bike shop. Some of the guys there have been great, and no lie, I've cadged a lot of knowledge hanging out there and talking to them. On the other hand, there have been times when I felt like I was being suckered a little. They assured me, for example, you can't hook a Sram 7 speed shifter to a Shimano derailleur, so I had to change the derailleur. I did, and it was only 25 bucks,  but I've seen articles online suggesting it might not have been necessary. Their tools are a little pricey, compared to what I can get them for online. I'm not impressed at all with the truing job they did on my wheels. The front is ok, but it wasn't bad to begin with. The rear... well I took it in with a popped spoke and so badly out of true it was rubbing hard on the brakes. They fixed it, and it's way more true than it was, but there's a significant hop in it, and it still wobbles a little. It's usable. For now. If they couldn't get it all the way true, it'd have been nice if they'd told me. In fairness to them, I looked at the work order, and it does not say anything about //truing// the rear wheel, only replacing the spoke, so maybe that was a service I needed to pay extra for. I don't know. I think in the scheme of things they'd really rather sell me a new bike than help some middle aged fat guy (me) learn to fix his own ride, and sometimes it shows. It depends on who you get.  Still, most of the stuff they've sold me has worked, even though they don't have much that fits my bike. (They tell me 7 speed rear ends are pretty much extinct. The Internet says otherwise. I realize they do have to be choosy with what they carry parts for though. In the real world space is limited.)
I wonder if maybe I'm just cross-threaded a little with the biking community, that it's a more rough-and-tumble kind of business than I'm used to dealing with.

Next steps:
Build my own truing stand. I have an extra fork (Steering tube was too long. Threaded, quill front end. Long, unpleasant story). They tell me that because my wheels are under a lot of stress, they'll need spoke tightening and truing a lot more regularly than they would otherwise. At 25 bucks a whack even if I don't break any spokes, that'll get expensive fast. Other than the stand, the tools are cheap. This is something I need to learn to do for myself. Also, if these wheels really do have that much trouble doing the job, I can hand-lace my own mix of components to make stronger ones.
Think about brake improvements.  The Ebike world would have you believe that rim brakes are simply inadequate for an ebike, let alone one with the payload mass my bike deals with. That hasn't been my experience.  All I can figure is these guys are going a //lot// faster, and since kinetic energy = 1/2 mass * velocity^2, the kinetic energy of their higher speed (that the brakes have to handle) quickly goes higher than mine, even with my higher mass. But if I do need better brakes, I've been looking at Sturmey-Archer drum brakes. Disk brakes... on a bike... I dunno. If you get the rotors dusty or oily your brakes malfunction. Badly.  (This is probably what made M fall on her rented bike. The disk brakes were grabby.) Drum brakes are all internal. Even if you ride in the wet (which I have no intention of, but you never know) the brakes will work as advertised. What the tires do is a different kettle of fish.
Lights. I can't even find my tail light, and my headlight is about the size of my thumb. I have a 48 volt battery with 13 amp-hours of current available. I didn't use a measurable amount in my 3.8 mile ride. I can afford to run some bigger, brighter lights.
If the system is fused anywhere, nobody's said anything about it. There are probably polyfuses in the controller, but if I tap the battery directly for lights, that does me no good. The ebike community seems not to be big on fuses anyway. I'm big on not having electrical fires between my legs. I have a 3d printer and I know where to order the connectors (Mouser) and automotive blade style fuses rated for 48 volts. There will be a fuse box.
Riding buddies I know guys at the gym who have ebikes. I know guys at the gym who may want one soon. And of course, there's my bestest buddy for all things, M.  I want to ride with others. I want this to be social.


That's where I am

10/31/2017 05:04pm Blog Entry

Why I Will Be Dumping Scrivener Shortly

Scrivener, you have failed me for the last time. Your complete incompetence saving to network drives is unacceptable. Your lack of a real Linux version is unacceptable. Your miserable compiling setup is unacceptable. Your IOS version is idiotic, hard to use, and unacceptable.  I have a day and a half's re-writing to do because of you. You and I are through.

*breaking neckbone sound*

Apology Accepted, Scrivener.

Seriously. If you have the chance to use Scrivener, DON'T. You will, unless your data setup is "a mac with no network connection," lose data. Don't think Dropbox can roll things back. It can't.  Time machine may get it, or it may not. (In my case I was on my Linux box running it in Wine.)  Scrivener may make backup files, or it may not, for no apparent reason. An unreliable storage venue for my text? Hell I have Microsoft Word for that.


//rant on//
A few revisions ago, Apple nerfed the Disk Utility. It was a perfectly good, powerful utility that let you repair permissions (which, contrary to what they swore, they never got quite right), format drives in at least a few industry standards, and so on.

No longer.

Today, I discover that the tool is wholly incapable of putting a FAT32 format on an SD card. Seriously.

Apparently it's a bug, but we're not talking an official beta version of the OS here, nor are we talking public alpha testing (aka first released version - like 10.12.0) we're talking a mature, stable version of MacOS X.

Every year they piss me off a little more. I've looked at the iPhone X. No home button? Nope. Facial recognition? Fuck no. I wear a hat now and again. Sometimes with a hood if it's cold. Sometimes I need to shave. Sometimes I don't. (I predict the iPhone X will be Apples Galaxy Note 7 minus the explosions and fire.)

It's not just the phone, though. They keep pouring useless crap like Siri into the desktop OS, rearranging things for no good reason, and violating the fundamentals of UN*X operating systems: root access can do anything. I'm tired of jumping through added security hoops that don't do anything but get in my way (gatekeeper, looking at you here.) I'm tired of a computer that can't ever seem to share monitors correctly. The list goes on and on.

It's like they've forgotten how to be a computer company.  One day, my biggest reasons to use a mac (supporting family members with macs and writing for commercial presses that think Microsoft Word is //good//) will end, and if this mac is still around, it'll become a respectable Linux box like all the rest of my computers except my phone and my iPad. If there were a viable option for those, I'd consider it when my phone comes up for replacement. (No, Android is not viable. It's much, much worse. I've tried it. Apple is at least picky who it lets shaft you. Android pimps you to everyone who walks by.)

I don't know what the solution is, but I'm slowly losing patience with Apple. Tim Cook needs to go. His minion Johnny Ive, who is very talented but needs a firm hand to rope him in to practicality, also needs to either go or get that firm hand. (Upside the head a few times, while tempting, is probably excessive.)

Can't stand Windows for long term use (though 10 isn't //bad//.) Slowly but surely reaching the same point with OS X. Don't really want to go Linux completely – I did the alternative platform thing with BeOS. I //like// being able to buy commercial software. I don't know what the answer is, really. But something's gotta change.
//rant off//

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