Quote:
Originally Posted by Mark McM
It appears all of the above statements are based on the BicycleRollingResistance.com tests, but none of these statements is entirely correct. Of the 3 fastest tires, only 1 is a true tubeless tire (GP5000 Tubeless) - the other two are tubeless ready and must be used with sealant. This is an important point, because sealant adds both weight and rolling resistant. Tests by BicycleRollingResistance.com show that the extra rolling resistance of sealant is about equal to the rolling resistance of a latex tube (and about the same weight also). Testing by AeroCoach have similarly shown no significant difference in rolling resistance and weight between latex tubes and sealant.
So a tubeless ready tire will have the same weight and rolling resistance with a latex tube as it does when using sealant.
(Note: The BicycleRollingResistance test protocol is biased toward tubeless tires. In an attempt to standardized testing, all non-tubeless tires are tested with the same type of medium weight butyl tube - even though lightweight racing tires like the ones mentioned above are far more likely to be used with latex tubes, or at least with lightweight butyl tubes, both of which will reduce their rolling resistance.)
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When these 'tech-y' subjects come up, I always look forward to Mark's responses..they are always spot on, and always backed with real info/data..bravo...