ZERO Derailleur Pulleys for Shimano 11-speed Winter & waterproof shoes They did note that there

They did note that there is an occurrence of diminishing returns with increasing width

Tacx and more

Generous spacing between bike mounts with the ability to adjust side to side to eliminate bike interference

Integrated sunglass storage built into the helmet

Pack of 10

ZERO Derailleur Pulleys for Shimano 11-speed Winter & waterproof shoes They did note that thereEnduro Zero Pulley Assemblies use grade 5 ceramic bearings. Races are won and lost by derailleur pulley drag. Sold in Pairs 9 Grams ABEC 5 precision cartridge bearing CERBEC USA Grade 3 Si3n4 Silicon Nitride balls 52100 high carbon Chromium alloy races Races receive 3 cryogenic treatments and a rust proof Magnetite finish "VV" type 2 lip non contact Silicone labyrinth seals Nylon graphite retainer