Thread: Tubes
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Old 09-08-22 | 03:36 PM
  #21  
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cyclezen
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From: Goleta CA

Bikes: a bunch

Originally Posted by terrymorse
Those numbers seem high, at least when comparing tubeless + sealant with latex.

Tests at bicyclerollingresistance.com, at 80 psi:

I'm not sure 'Tubeless' can be directly compared to 'Latex' or even 'Butyl'.
A 'Tubeless' tire will have a different construction, than a tire built for tubes (Latex & Butyl), Even if a manufacturer gives it the same model name, the tires will be different.
Then considering that 'Tubeless' CRR curve (at varying psi) will be different and be optimized different from Tires with Tubes.
I don;t think that you can compare at any 'same' psi... One might be able to make a comparison, by using whatever is the lowest CRR found (at whatever psi and applied 'weight') and then compare to the lowest CRR for the other mode....
for example:

note the sharp increase in CRR at 115 psi, here from a Tom Anhalt study, referenced in a SILCA article on impedance... there would be a substantial increase in CRR with the tire/tube inflated to 80 psi... and this would all be different for a Tubeless.
It doesn't seem there's an easy 'This is better than That', when it comes to actual wheel/tire usage.
also, it would be good, when posting some tech 'image' or 'data' to also include a link to where that data can be found... gives readers an opportunity to do their own review and their own conclusions.
Ride On
Yuri

Last edited by cyclezen; 09-08-22 at 03:39 PM.
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