Quote:
Originally Posted by combustiblefuel
Both systems essentially work the same way. The only real benefit of tubless is it knocks of a few 100 grams of weight.
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Not even close. The top cause of flats around here is pinch flats. Go somewhere with cactus or thorns and sealant saves the day. Yes I know you can use sealant in tubes, but no one does.
Tubeless setups are heavier in many cases because of the thicker sidewall on a lot of the UST tires and the weight of the sealant.
Quote:
Originally Posted by combustiblefuel
No way . the less tire touching the ground (more pressure) the less rolling resistance you'll get. Less pressure is better for absorbing bumps but if you have any sort of rear suspension then this would negate the need to have lower psi in rear tires. Basically, the article is saying low pressure tires act as a suspension system that allows a hardtail to maintain controle sacrificing speed.
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This is also completely wrong. I wish I could find that Schwalbe study as it points it out very clearly, but you are interpreting the other article wrong. When you hit a bump with high pressure, your whole wheel has to move up to go over the bump. Even with suspension, that is a bunch of energy being soaked up by your damper, as well as lifting the weight of your wheel and lower fork (if front) or wheel, derailleur and swing-arm (if rear).
With lower pressure, the tire just deforms, and there is barely any lifting force transferred.