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i mean there isn't much aero benefit when you are above 1.05 of rim width right? these guys are already running 28 or 30mm tubs on rims designed for 23 or 25mm tires.
idk i'd guess they were much less likely to puncture. i've only rarely had tubeless punctures that didn't retain a rideable amount of pressure. seems like not having the tire come off the rim is a pretty low standard. with 50mm you wouldn't be bottoming out at all.
zmjones_-
Sagan is running 30mm tubulars on 29.something mm rims so original point stands. There's also the fact it's not a CX/MTB race it's a road race with a portion on rough roads. Riders aren't going to choose poorer aerodynamics and poorer Crr for 200k of smooth tarmac just to have a comfier, maybe less puncture risk on the remaining.
Tubeless still means one spray of sealant that doesn't seal and you're fucked. Tubs at least will be rideable and that's the difference between being in with a chance of contesting a win and having to jump the fence to get into the velodrome.
hippy
50mm? bro do u even aero? And even if they were less likely to puncture, they could still puncture and then you're still fucked compared to running tubulars.