What bottom bracket does a 3T Exploro gravel (Primo, Racemax) use?
The bottom bracket shell standard on a 3T Exploro gravel (Primo, Racemax), and how to pick the right BB.
This frame's shell
| Frame | 3T Exploro gravel (Primo, Racemax) |
|---|---|
| Shell standard | BB386EVO press fit (46 mm bore, 86.5 mm) |
| Shell inside diameter | 46 mm smooth press-fit bore |
| Shell width | 86.5 mm |
SHELL 86.5 mm
SPINDLE see table
SPINDLE see table
The 3T Exploro gravel frame uses a BB386EVO press-fit shell, the 46 mm bore 86.5 mm wide.
Some later Exploro Ultra frames instead use a BB86/BB92 press fit. Check which Exploro you have before buying.
The bottom bracket to buy
Search Amazon for BB386EVO press fit bottom bracket for your crank spindleaffiliate searchFind BB386EVO press fit bottom bracket for your crank spindle on eBayaffiliate
Fit a crank to this shell
BB386EVO press fit shell46 mm bore, 86.5 mm30 mm spindle (BB30 / PF30 style) in a BB386EVO press fit shelldrops inShimano Hollowtech II (24 mm) in a BB386EVO press fit shellneeds a reducerBottom bracket for Specialized Tarmac SL7 (2021 to 2023)related shell
SOURCES: Cycling Weekly, Road bike bottom bracket standards explained · Wheels Manufacturing, BB Overall Width Reference Chart · Park Tool, Bottom Bracket Standards and Terminology