A Trek Procaliber frame uses a BB92 press fit (MTB) bottom bracket shell (41 mm bore, 91.5-92 mm). The dimensions, which cranks fit, and the exact bottom bracket to buy.
Updated 05 September 2026.
What bottom bracket does a Trek Procaliber use?
The bottom bracket shell standard on a Trek Procaliber, and how to pick the right BB.
| Frame | Trek Procaliber |
|---|---|
| Shell standard | BB92 press fit (MTB) (41 mm bore, 91.5-92 mm) |
| Shell inside diameter | 41 mm smooth press-fit bore |
| Shell width | 91.5 mm and 92 mm |
SPINDLE see table
The Trek Procaliber uses a BB92 press fit (MTB) bottom bracket shell (41 mm bore, 91.5-92 mm), a 41 mm smooth press-fit bore, 91.5 mm and 92 mm wide.
It is a press-fit shell, so bearings or cups press into the 41 mm smooth press-fit bore. Match the shell width as well as the bore, because a shorter unit will not preload the crank across a wider shell.
SOURCES: BikeRadar, The complete guide to bottom bracket standards · Wheels Manufacturing, BB Overall Width Reference Chart · Park Tool, Bottom Bracket Standards and Terminology
Questions and answers
What bottom bracket does a Trek Procaliber use?
A Trek Procaliber frame uses a BB92 press fit (MTB) bottom bracket shell (41 mm bore, 91.5-92 mm).