Sunday, April 17, 2016

Smooth 26 Inch Tires for Zippy Ride

1995 Trek with Michelin Run'r tires installed
1995 Trek Singletrack bike with 26 inch 1.4 inch wide Michelin Run'r tires installed

Michelin 26 inch Run'r 1.4 inch tires
Close-up view

When I bought this bike, it had some Kenda knobby tires that are 1.95 inches wide (according to the sidewall) installed. Ths rims of this bike are a little narrower than the wheels on newer mountain bikes I have and the 1.95 tires looked a little odd on the more narrow rims. Also, they are noisy when riding, even when pumped up, and likely do little to make the bike zippy.

I found these Michelin Runn'r tires at Bike Tires Direct. There are supposedly made of the same rubber compound as road bike tires (although lots more of it) and yet only cost around 16 dollars each. The sidewall says that the max inflation is 87 psi, but at 75 they seemed plenty hard enough. Bike rides great with these.

Saturday, April 16, 2016

Evolution of My Bike Helmets & MIPS

Untitled
The progression of bike helmets I have owned - at right, 16 years old (or so), in middle 8 years old, and the brand new one

Untitled
The inside view of the three

Untitled
The MIPS compliant LaZer Tonic helmet I just bought

Untitled
Inside of new MIPS helmet - note the yellow inner liner that can move around

The Bicycle Helmet Safety Institute (aka helmet.org) says that Bell, for example, recommends replacing a bicycle helmet every three years - I think I've seen that elsewhere. Yes, what a wonderful world it would be for companies that make helmets if everyone followed that - but otherwise it makes little sense if the technology doesn't change.

In the late 1990s, I had a Specialized helmet that was mostly good for me since it was sized as a large (not "one size fits all") and I have big head. It was simply a chunk of Styrofoam (tm) with a blue plastic cover held in place with tape around the edge of it, some holes for ventilation, and simple straps. Space between head and helmet was provided by bits of spongy padding. It was good to put stickers on (the outside) but I think I outgrew that somewhere in my 50s.

In 2007 I bought a road bike that I guess was a ramping up in my seriousness (or something) so I decided I needed a new helmet - I found the red one made by Tirreno (which it seems is a Performance Bike house brand) in a large size on sale. It has been what I have used since. It looked sporty but I didn't find it terribly easy to adjust the straps, and recently the plastic ring that grips the wearer's head broke. The ventilation slots, while numerous, are narrower than the older helmet, which isn't so good. I also eventually realized it has a design flaw - towards the front there are slots that come together resulting in a parts of the helmet facing forward that could hook something hanging down from a tree (or whatever). This is in fact amazingly stupid (from a design perspective). Yeah, it is highly unlikely, but still - completely avoidable.

I have read about the MIPS helmet technology that is supposed to help prevent concussions by allowing the head to roll more easily in the helmet. Some people think this is baloney and maybe it is, but at least it represents an attempt at an advancement beyond basis protect for your head from a chunk of Styrofoam (TM). All the MIPS helmets are more expensive but I was able to find a LaZer Tonic (which apparently is intended for commuters) with MIPS from Bike Tires Direct for $75 on sale. It doesn't look like a road racing helmet (oh well) but it has good large ventilation holes, fits me well, and it is supposedly safer (maybe). I've ridden a few times with it; it seems good.




Sunday, April 10, 2016

Raleigh Sports, Paris Variation of Braking

Raleigh Sports Paris-style
Raleigh Sports bike from 40 or so years ago, much like one I have at home

I have a very similar bike from what must be about the same time period. This one, parked on the streets for many years (one assumes) is in remarkably good condition - much better than the one I have (which I got only a few years ago from someone giving it away). It has some superficial differences - the rear rack that clearly came with it, for example, and the full rather than partial chain guard. But it also has a very surprising (to me) difference - the brake system is not a cable-pull system with caliper braking front and back but rather front and back rod-driven brakes that bring brake pads up against the inside of the rim. Just as a traditional caliper brake uses the rim like the disk of a disk brake system, this is like an open drum brake using the entire rim as the drum, but only pressing on one side. I don't even know what this is called. I am quite doubtful as to how efficient it might be.

1973 Raleigh Sports
My 1973 Raleigh Sports, much the same except where it is completely different

Raleigh Sports Paris-style
Back end - rather less than elegant wiring for tail light from old style generator

Raleigh Sports Paris-style
Impressive front porteur rack - that would look good on mine!

Raleigh Sports Paris-style
Note rod-driven brake pulls

Raleigh Sports Paris-style
Between the rack and the rods for the brakes, there are a lot of chrome bits of metal here

Raleigh Sports Paris-style
Note rod to activate rear brake under down tube

Saturday, April 9, 2016

Sunday Ride Along the Seine (March 20)

On Sundays in Paris various streets and roads are closed to vehicular traffic, including a stretch along the Seine river.

My wife and I were in Paris for a week in March. The weather was seasonal - so it wasn't too warm, but not cold, either. We didn't have any rain until the day we left. We were right in the middle of the city. One of the lovely things about Paris is that you can rent a Velib bikeshare bike for almost nothing for a week - 8 euros. Yes, 8 euros for an entire seven days! This can be done easily online in advance, and you get an account number and a pin number (which you have to keep track of). It is very nice to have available as a travel option.

Untitled
These are the best not-very-good bikes in the world!

Untitled
It was a little cool

Velib Sunday outing in Paris
One of the traffic tunnels that are part of the route

Untitled
Marker for the end of the closed off section

Untitled
Entrance to traffic tunnel near northwest end of route

I didn't take photos with very many people in them, for some reason, but I thought for a cool cloudy Sunday that there were a fair number of people out, on bike, skates, hoverboards (a hoverboard training class), skateboards, and of course walking.

Velib Sunday outing in Paris
Looking back into another tunnel

Untitled
Other end of the ride

In the distance, along the far side of the river, the four towers of the main building of the National Library of France are visible.

Sunday, March 20, 2016

Saturday, March 12, 2016

Predictable-Alert-Lawful on Your Trail, in Your Neighborhood

The "be a PAL" bike trailer of Arlington VA
The PAL campaign mobile unit-the bike trailer has a 20 inch wheel on each side

On my way home Thursday, it was surprisingly windy given that weather.com suggested a SSW wind of 10 mph. I was surprised to find the young woman above walking her bike that has a PAL - predictable, alert, lawful - billboard-trailer. Apparently despite the holes cut in the fabric to let the wind through, it doesn't do well in a crosswind. If the thing blows over, she would get pulled over too, so she was walking. I guess she does this as a volunteer? Or someone pays her to ride around Arlington trails with this thing? This isn't the first time I have seen her, just the first time I have seen her walking. One odd aspect is that when riding along and seeing her coming the other way, or passing her, there is no time as a cyclist to read her trailer-billboard. So I sort of don't understand it.

I don't know if other jurisdictions have this PAL slogan and campaign or not. Somehow to me it comes across as a little too focused on illegal cyclist behavior or that assumption that if only cyclists would clean up their act everything would be fine. They endorse the following PSAs.


Makes the point that cyclists are the ones who die so they should avoid breaking laws

The problem I have with this logic is that the parallel would be that since motorists have pretty good protective metal boxes around them, it's OK to be a little free and easy with the obeying the traffic code.


Illustrates the classic "right hook" threat to cyclists from motorists

It's interesting that even the demonstration of how it should be done, turning behind the cyclist, results in the car rushing up directly behind the cyclist in a way that would not be great to experience. Better than being cut in front of, yes, but not great.


Motorists in cars should look before opening the driver's side door

These PSAs make good points, but for me there is usually something off about them. In the last one about avoiding getting doored, the third scenario suggests that in the end you should ride in a bike lane well away from the parked cars, presumably because the motorists may well not check before opening a door. In other words, in the end it is all on you Mr. or Ms. Cyclist.

And for whatever reason I end up grinding my teeth a bit whenever I see reference to this PAL campaign (which fortunately isn't often - they seem to have taken the ads for it off the County transit buses). "Predictable" is fine as advice, although it is clearly more about cyclists than motorists. (In fact, most of the predictable motorist behaviors are the ones we don't want, like opening doors without looking or cutting off cyclists with right turns.) "Alert" seems to be because they needed a vowel. Because otherwise, duh. Alert. Yeah. But it is the "lawful" that annoys me most, but I suppose as much as anything because it makes no grammatical sense. What they mean is "law abiding" but I guess that is two words.

Hmmm.

ADDENDUM: BikeArlington read this and says: I also saw your latest post on the PAL trailer. While [the PAL trailer-bike and rider] does ride on the trails, her primary focus is to connect with motorists. She’s frequently camped out along the Mount Vernon trail to interface with traffic moving slowly on the GW Parkway.

The idea behind the PAL campaign is that it’s designed to be targeted towards all mode of travel. We recognize that pedestrians jaywalk, that people on bikes will run red lights, and that motorists will speed and text. We don’t assign blame to anyone in particular, but rather just point out that if everyone travels in a manner that is predictable, alert and lawful, that we would have much less conflict on the streets.


OK.