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

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

Super Light OCLV Mountain Carbon, IsoSpeed, tapered head tube, MicroTruss, Control Freak internal routing, balanced post-mount brake, Boost148 on M and larger sizes (Size S: 142x12 mm rear hub)

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

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