Compare bikes: Compare Trek Procaliber AL Frame Set (2021) vs. Trek Procaliber Frameset (2021) - Findabike

Alpha Platinum Aluminium, IsoSpeed, tapered head tube, internal derailleur routing, balanced post-mount brake, Boost148, 12 mm thru axle

OCLV Mountain Carbon, IsoSpeed, tapered head tube, Knock Block, internal control routing, balanced post-mount brake, Boost148

FSA IS-2, 1-1/8" top, 1.5" bottom

Knock Block Integrated, 62-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom