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From: Frank Krygowski <frkrygow@sbcglobal.net>
Newsgroups: rec.bicycles.tech
Subject: Re: Rolling Resistance
Date: Sat, 21 Jun 2025 14:57:55 -0400
Organization: A noiseless patient Spider
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On 6/21/2025 11:29 AM, Mark J cleary wrote:
> 
> I remember saying I got a lot miles on my tires compared to what others 
> were getting and Mike Jacoubosky say it was because I did not climb. He 
> said that climbing will wear tires out more. Mike is a Trek store owner 
> in Redwood California and I respect is opinions but generally would 
> disagree with this. I can see that going up long grades you go slower 
> turnover and possible some more tire wear but nothing like seemed to 
> imply. His implication was climbing is hard on tires.

I think he's right. The harder the (rear) tire has to push back against 
the ground, for example when climbing, the faster it will wear. Here's why.

When the tire is pushing back against the ground the rubber flexes. The 
bit of rubber doing the pushing at any one instant is flexed towards the 
front of the bike. (You can simulate this by taking a rubber eraser in 
contact with your desk and pushing to the right. The bottom of the 
eraser is deflected to your left.)

At the instant that rubber loses contact with the surface, it flexes 
back or straightens out. As it does so, it scrapes a bit and a 
microscopic bit of rubber is abraded off. The harder you're pushing, the 
greater the effect.

-- 
- Frank Krygowski