Twilight commuting benefits

The big, fat moon was coming up over Lake Wentworth when I got to the causeway. You can't see it, but a loon was swimming around in this postcard landscape.

In the last mile of the ride back to where I park, the moon was just clearing a ridge beyond a grassy wetland. The temperature was nice. Not too cool, not too warm. A night to ride slowly enough to look at things.

Organization is key

Tip of the day: keep small parts together in neat containers with the contents clearly labeled.

The all-seeing, all knowing mechanic

This morning on my path commute I came up behind an older man on a hybrid bike. Usually riders and walkers hear me come up behind them. They generally prefer to pull aside. Not this guy. He entered a long stretch where the path runs between the rails. I would not be able to pass him without making a point of inconveniencing him.

I had to laugh, being stuck like a motorist in traffic, or like a driver behind a cyclist where it isn't safe to pass. I had plenty of time to think about it as he made his leisurely way, apparently unaware I was back there at all. I stayed quiet so he wouldn't feel compelled to make room for me in the narrow confines of the rails.

Long minutes passed. I scrutinized the details of his bike. Why was he in that strange gear, on the small chainring up front and the smallest or next smallest cog in back? Were the shifters acting up? I checked his crank to see if it was a crank of death. Tne brakes indicated it was about a 1998 bike, safely past the Crank of Death era.

The tires looked like about 700X35, with no bald spots. I couldn't guess at chain wear, but it looked like it needed lube.

Finally we moved out from between the rails. I gave what I hoped was a cheery greeting as I passed. As soon as I got ahead of his wife I sprinted away. I was late for work.

At the shop I was chatting with my coworker as I unloaded my bike. Up the stairs came the guy from the bike path. He did not have his bike, but I recognized him.

"I want to get a bike tuned," he said. "And I want to know if it will take wider tires."

"Oh yeah, it looks like it probably will," I said.

He looked at me strangely. "How do you know that?" he asked.

"I was behind you on the path," I said. I wish I could have made it more mysterious. At least I had that one moment where he thought I had psychic powers.

Pretty-looking crap

The front derailleur on the cellist's bike suddenly stranded the chain on the big ring and refused to bring it back. It's a problem I've seen several times before with Shimano front derailleurs.

One end of the return spring is held by a tiny aluminum nub. After a while, the aluminum can't hold back the spring steel and simply wipes away. This usually happens when the rider has shifted the derailleur out as far as it will go, putting maximum strain on the return spring against its inadequate stop.

The Sora derailleur I just got to replace the cellist's broken Tiagra has just as tiny a bit of aluminum holding the return spring. It's pretty, but no better than the strength of its designed-in fatal flaw.

Usually I scavenge parts off a broken derailleur and throw the rest in the recycling. But I might try to bend the spring on this latest casualty to see if I can get it to bear on the thickest part of the arm. It could go forever like that. More likely the spring will snap. But there's nothing to lose. It's scrap metal as it stands.

Tablet is a funny word

For easy carrying on bike  commuting days I just got this 7-inch tablet. It seems really good so far. Not being a touch typist I don't mind looking at the virtual keyboard. My fat fingers seem to do reasonably well on the little pictures of keys.

The touch screen is very sensitive. I noticed I left a strange word in a comment on DFW Point to Point this morning. Eternal vigilance is the price of comprehensibility.

The7-inch tablet fits perfectly in the rack pack on either commuting bike. It's nice and light as such things go. It may help  me capture some of the elusive observations I make in the workshop, previously scribbled on scraps of paper for future composition. Most of the time I just end up stuffing them in the woodstove days or weeks later when I find them in a pile somewhere around the house.

We provide...leverage

Trust the bike industry to create a compatibility issue in something as simple as a front shifter.

A customer had us build a bike for him for the Mount Washington Hill Climb back in 2003. He used it in the race every year until last year, when he asked us to convert it to a flat-bar road bike.

The frame was a Trek 5900 SL. The carbon fiber road frame uses a bracket for the front derailleur rather than a derailleur with its own clamp. This was irrelevant on the original build, because we did not mount a front derailleur. In fact, the frame had no derailleur bracket when he had the bike delivered for its road conversion. Finding a bracket to fit a frame that was nine years old -- prehistoric in current bike industry terms -- was a treasure hunt. It was easily resolved once we found someone who knew the right part number at Trek. So we were all set, right?

Come on. This is the bike industry we're talking about. The business that's been killing the wounded and eating the dead since the 1990s. The group that puts its elderly out on the ice floe to die before they're even out of grade school.

Our customer wanted grip shifters. He also believed that the road conversion would be a simple matter of adding the parts the climbing bike had done without. It's a reasonable assumption if you don't work with this machinery all the time. Even I felt that the front shifting would be the least of our worries once we rounded up a very basic array of parts. A ratcheted front Gripshift is a simple device for pulling cable. A front derailleur is a simple device for pushing a bike chain toward a chainring with which you want it to engage.

Trigger shifters and road brifters only pull a specific amount of cable. A compatibility issue there is no surprise. It's expected. The customer's request for the closest thing to a friction shifter seemed to get us around that. But the shifters we use technically come from the "mountain" category and the only front derailleur that would work with this frame mount and gear range comes from the "road" category.

The shift to the middle ring on the triple crank went well enough, but that last little twist to make the big ring was incredibly stiff. And no matter how much cable tension I put in the system, the arm on the Sora FD-3503 is too short, and angled in such a way, that it barely swings far enough to clear the ring. The shifter never manages to pull it all the way to its limit screw.

With no alternative parts, I had to make these work. Introducing the Cafiend Leverage Enhancer.

The arm of the derailleur is extended with part of an old brake cable adjuster. It's bolted to the arm, where it braces against the cable routing flange to keep it from rotating downward when the cable gets tighter.

At the shifter end, the diameter of the grip seemed a little small too. We've had older riders complain that they have trouble with that. Lacking anything more elegant, I built it up with several layers of inner tube. If he likes that but wants something a little zootier I'll get some of that black foam insulation they use on air conditioning lines, and snug it on there with some super-fat shrink tubing. He won't be back until next summer, so we'll have to wait and see.

The system works. Shifting is easier. I have one more brake adjuster that's a little longer if he wants that, but we start to get a little close to the rear tire then. If the rider wanted to put on something cushier than a 700X23 things could be tight.

Profiting from the government shutdown

This morning a couple of guys who had been furloughed from the Kittery Naval Shipyard (FKA the Portsmouth Naval Shipyard) bought an inner tube before taking advantage of their unscheduled time off on this beautiful, warm , sunny day to get a road ride.

That's one more inner tube than we would have sold if they hadn't found themselves with the day off.

So much for our exciting lives here.