<
[email protected]> wrote in message
news:[email protected]...
> Steve who? writes:
>
> > I'm damaging rear 700cc rims every time I hit something hard (not jumping off curbs). This is
> > getting expensive. Does anyone guarantee rims?
>
> It's not riding off curbs, or stairs for that matter, that ruin rims. It's riding into curbs or
> angular objects with:
>
> 1. too small a cross section tire,
> 2. insufficient inflation pressure
> 3. overweight rider
> 4. clumsy bicycle handling
>
> > I've tried Mavic and Sun including Ryno-lite. Thinking about going to a 26" rim or even smaller
> > (never a problem with Bike Friday 20" rims).
>
> You cannot expect a rim to survive bottoming on an obstacle or even on a flat road. All aluminum
> rims have nearly the same bead-hook and sidewall. Therefore, choice of rim has no effect.
> Explaining the circumstances under which you destroy rims would help, both because readers might
> recognize a solution and because describing it in writing might help you recognize the answer
> yourself.
>
> When did you start riding bicycles?
>
> Jobst Brandt
[email protected] Palo Alto CA
Steve,
Night riding can be a challenge to see and avoid all obstacles that can cause damage. I suggest you
consider the following:
1. A quality shock absorbing seat post (or always ride with your seat unweighted) (are you carrying
panniers or other dead weight?)
2. Bontrager Fairlane OSB rim (reasonably priced, wider, heavier, and more durable) You will get a
little additional margin of vertical deflection before bottoming out if the tire side wall are
closer to parallel to rim walls.
3. Put the largest cross section tire you can fit.
4. Keep inflated to maximum recommended pressure. (carry and use a pump like Topeak Morph)
5. More lighting to help spot obstacles
David Ornee, Western Springs, IL