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From: AMuzi <am@yellowjersey.org>
Newsgroups: rec.bicycles.tech
Subject: Re: Rolling Resistance
Date: Fri, 20 Jun 2025 19:28:39 -0500
Organization: Yellow Jersey, Ltd.
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On 6/20/2025 6:04 PM, Frank Krygowski wrote:
> On 6/20/2025 4:34 PM, cyclintom wrote:
>> If you scan the rolling resistance chart all of the lowest 
>> rolling resistance is on 25 mm tires. What that implies is 
>> that the drum is entirely out of sync with the real world 
>> since wider tires with lower pressures are both faster and 
>> less likely to puncture. It is time fore the rolling 
>> resistance people to redesign their setups to have more 
>> connection to reality. My speed after two weeks off of the 
>> bike with 32 mm tires is half a mph faster than riding a 
>> lot on 28's
> 
> I'm going to shock people by agreeing with you on one point. 
> I do think the current test rigs for rolling resistance need 
> serious improvement. I've mentioned that before.
> 

+1
A long time complaint here on RBT beginning with Mr Brandt 
long ago.  Steel drum tests can be very accurately measured 
but what they measure leaves a void between that and our 
actual world.

-- 
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971