01 October 2015

Vera Goes Gran Fondo

You tell yourself, "This is it!"

You're not going to buy another bike, you tell yourself.  The bikes you have are "for life".

No more changes, no more upgrades, you say.  You're not going to buy another part unless you absolutely have to replace something that's worn out or broken.  You won't buy another bike accessory, no matter how great it looks or whether you really wonder how you've lived without it. And you absolutely swear not to go to any more swap meets, spend any more time hanging out in bike shops or while away your evenings looking at bikes and parts on eBay.

And you promise yourself you won't lift another allen key or screwdriver, or squeeze your oil can or grease gun, unless you're doing maintenance that absolutely must be done to keep your bike rolling.

But you know, deep down, you're lying to yourself: Once you learn how to tinker with your bikes, you won't stop--no matter how little mechanical aptitude you thought you had before you picked up that first repair manual, that first edition of Anybody's Bike Book.

You always find something to fix, even if it doesn't need fixing.  And there's always some experiment you want to try.



So it is with Vera.  Just before I went to Paris, I had an idea:   I'd turn  her gearing from a typical "compact" road setup (well, with slightly lower gears) to something I'd never before tried:  Gran Fondo gearing.






Turns out, I had everything I needed for the experiment. Well, almost.  The crankset that originally came with Vera--a Shimano Deore triple from the late '80's or early '90's--was sitting in a box, just begging to be reunited with her.  A BBG 46 tooth chainguard/bashguard, also sitting in that same box, would look good on that crank--and on Vera--I thought.   And I had a nice Stronglight 46 tooth chainring I'd been using with my the compact double as well a Shimano UN-52 bottom bracket that, according to the folks at Harris Cyclery and Velo Orange, would work. All I'd need is a 30T chainring with a 74mm bolt circle, which I found easily enough.

I installed the chainguard in place of the outer chainring.  The Stronglight ring, made to be an outer ring for a double or triple, went on the middle position.  And, of course, the 30T ring was bolted on the inside.  

I installed the Stronglight chainring with the logos facing out, as if it were in the outer position.  That meant the chainring fixing nuts wouldn't sit flush with the surface of the ring, as the holes for the chainring bolts are countersunk on the opposite side of the ring.  That didn't seem to matter.  I've ridden the setup about 200 kilometers and it doesn't seem to be coming loose--and the nuts standing proud of the chainring surface doesn't seem to affect the shifting.
In this image, you can see the countersinking of the holes for the chainring fixing nuts.  You can also see a segment of an example of drillium at its best or most extreme, depending on your point of view!



Speaking of which:  I've shifted, well, only to see how it shifts.  I haven't ridden on the 30T ring.  But part of my intention in setting up the gears as I did--and, by the way, I set up the gears on Arielle, my Mercian Audax and Helene, my other Miss Mercian--was to spend most of my riding time on the larger ring and to use the smaller one as a "bail out" gear.

In any event, the shifting was even smoother than I expected it to be.  The Shimano 105 front derailleur from the 8-speed group is made to handle, as most modern road front derailleurs are, a 14-tooth difference between the chainrings.  Part of the reason why I haven't had problems with shifting is, I believe, that I'm using a non-indexed downtube shifter.  I wonder how (or whether) the setup would work if I were using Ergo or STI levers, or even bar-end shifters.

The bottom bracket's axle is 127 mm long.  The crank is actually made for the old-style asymmetrical axle:  The original bottom bracket is what's known as "121+5":  In other words, 5 mm are added to the right side of a 121mm axle.  Using the modern bottom bracket doesn't seem to affect shifting or my pedal position"  It just leaves more axle showing on the left side than what you see with modern cranks and bottom brackets.  However, if I keep this setup, I might splurge (if finances permit) for a Phil Wood bottom bracket with the asymmetrical axle.



In reality, riding with this setup isn't different from riding with the compact double, as I am using the 46T ring nearly all of the time.  But I think that it will allow me a greater range of gears, should I ever want or need them.

Vera seems to like it.  Truth be told, I think she likes getting the nice old crankset back.

30 September 2015

The CPSC Is Recalling 1.5 Million Bicycles Because....

All right.  I'm going to begin today's post with another "Which is worse?" question.  The difference is, this "Which is worse" question will have three choices.

Here goes...

Which is worse: 
  • a technical "innovation" that's superfluous,
  • someone who doesn't know to use it safely, or 
  • some government bureaucrat who doesn't know the difference?

That question entered my mind when I learned of a recall involving bicycles from thirteen different manufacturers.  

The 1.5 million bikes in question have front disc brakes.   As "The Retrogrouch" and others have said, very few cyclists actually benefit from, let alone need,  disc brakes.  


To be fair, I will point out that, although the recall was announced as one involving "bicycles with front disc brakes", the brakes themselves were not the problem.

So why the recall?, you ask. 


According to the US Consumer Products Safety Commission, which ordered the recall, when the bicycle is ridden with the quick-release lever in the fully-open position, the lever is only 6mm (or, as the CPSC notes, the width of a number 2 pencil) between the lever and the brake rotor.   

I'll run that by you again:  If you ride one of those bikes with the front wheel's quick-release lever fully opened, the lever is too close to the brake rotor.

Now, if you're going to ride a bike with quick release levers, you should know how to open and close them, and you should know enough not to ride with them open.  Forget about whether you have disc brakes: If your quick release is open, your wheel can slide or fall out from under you when you turn or hit a bump.  Or the lever can get snagged in your spokes--or, if you have a disc brake, on the rotor.

That last scenario is what prompted the recall.  Three incidents of it were reported to the CPSC.  When the lever came into contact with the rotor, the wheel came to a sudden stop or fell out of the bicycle.  One of those incidents resulted in injury.

So, because someone who doesn't know how to use a quick release got hurt, 1.5 million bicycles are being recalled.   That's good, sound judgment from the CPSC, isn't it?

Here's how you can tell if your bike is part of the recall:



 

29 September 2015

Allen Brumm: A Cyclist Follows The Law And Is Blamed For His Own Death

Which is worse:  An ill-conceived law-- or a law enforcement official who is ignorant of, or misinterprets, a law?

The death of Allen Brumm seems to beg such a question.

The 57-year-old California cyclist was riding in a time trial when he was struck head-on by an oncoming motorist.

California Vehicle Code 21751 mandates the following:

Passing Without Sufficient Clearance 21751. On a two-lane highway, no vehicle shall be driven to the left side of the center of the roadway in overtaking and passing another vehicle proceeding in the same direction unless the left side is clearly visible and free of oncoming traffic for a sufficient distance ahead to permit such overtaking and passing to be completely made without interfering with the safe operation of any vehicle approaching from the opposite direction. 

Now, I'm not a lawyer. But it seems to me that the key clause in that passage is "unless the left side is clearly visible and free of oncoming traffic for a sufficient distance ahead".  In other words, if you're driving, you're not supposed to pass unless the left lane is clear for as much distance as you need to pass.

The 35-year-old-driver had pulled to her left to pass another cyclist on County Road 19 in a rural area of Yolo County, west of Sacramento. Mr. Brumm was riding in the oncoming lane.



This is a Google Streetview of a section of CR 19 near the crash site.  As you can see, there was nothing to obstruct her view almost clear to the horizon.  

California Highway Patrol Sergeant Andy Hill, in describing the accident, said "both parties" contributed to the collision.  He did not specify the driver's culpability, but said that Mr. Brumm's fault lay in his riding "as far to the right" as possible.

This is what the Golden State's Vehicle code specifies:

Operation on Roadway 21202. (a) Any person operating a bicycle upon a roadway at a speed less than the normal speed of traffic moving in the same direction at that time shall ride as close as practicable to the right-hand curb or edge of the roadway…. 

 Again, take my reading of this, as a non-barrister, as you will.  But it seems to me that the key part of this statute--as it pertains to the accident in question--is "shall ride as close as practicable to the right-hand curb or edge of the roadway.

The last time I checked, "practicable" does not mean quite the same thing as "possible".  Were Tour de France riders to descend any Alpine road as far to the right as "possible", there wouldn't be enough riders left to continue the Tour de France!  Even the most skilled rider would have a hard time not falling off a virage were he or she to ride as far to the right as possible.

On such roads, riding as far to the right as possible could mean riding on rocks or on the edge of a cliff.  In other situations, it could mean riding on ice or on a soft shoulder that would act as quicksand under a bicycle tire tread.

That last scenario is--from what I've read--what Mr. Brumm encountered.  Riding as far to the right as possible would have meant not riding at all.  So he rode as far to the right as was practicable in that situation.

Once, on a ride in Pennsylvania, I got into an argument with an officer about that very point.  The Keystone State, like many others, has (or had, at that time) language similar to CVC 21202 in its laws.  To the right of the roadway on which I was riding was the muddy bank of a stream, which would have been all but impossible to ride on the road bike I was pedaling.  That road was similar to the one on which Mr. Brumm died--a two-lane county road in a semi-rural area.

I explained to the policeman--who, I believe, was not a cyclist--the near-impossiblity of riding "as far to the right as possible".  He said, "Well, maybe you shouldn't be riding this road."  I think he knew that I didn't live in the area and, to his credit, suggested another nearby road, which I rode back to the bridge in Uhlerstown.

And, of course, I rode as far to the right as was practicable into New Jersey.  Poor Allen Brumm did the same in California and is being blamed for his death.

My sincere condolences to his friends and family.