Originally Posted by
terrymorse
Yes, obviously, a GP 5000 clincher vs a GP 5000 TR (tubeless ready). It wouldn't be very useful to compare a tubeless tire to itself with a tube in it, now would it? People who have bought into the tubeless trend aren't going to be inclined to put an icky old tube in there.
My assertion stands: a clincher tire with a latex tube can be as efficient, or more efficient, as a similar tubeless version of that tire.
Except the GP 5K, being a different tire, inflates to a different volume for the same nominal width than the S TR, so it really is comparing apples to oranges.
There actually are some anti-sealant people out there who put in TPU or latex in because they don't want to fuss with sealant. BRR has consistently shown there is a RR penalty for doing this:
https://www.bicyclerollingresistance...-tubes#results
https://www.bicyclerollingresistance...-tubes#average
Also, some pros and copycat amateurs are now using tubeless TT tires in the front or even rear because they are the fastest tires on the market despite being paper-thin, because with sealant inside there isn't as much of a concern about puncturing. Using a tube instead simply wouldn't be wise or result in the same speed -- 0 kph is as slow as it gets when one is pulled over to fix a flat.
From a 2023 Escape Collective article: "many Conti-equipped teams have been using the TT TR since the start of this season for its lower rolling resistance and weight."