Shell Bb30 vs Shell Bb86: specs compared
Updated 05 September 2026.
4
specs differ
Shell Bb30 and Shell Bb86 differ on 4 specs: shell inside diameter, shell width, thread, crank spindles it hosts.
| Spec | Shell Bb30 | Shell Bb86 |
|---|---|---|
| Type | press fit | press fit |
| Shell inside diameter | 42 mm smooth press-fit bore | 41 mm smooth press-fit bore |
| Shell width | 68 mm (road) and 73 mm (MTB) | 86.5 mm |
| Thread | none, two 6806 bearings press directly into the 42 mm bore | none, two cartridge bearings in plastic cups press into the 41 mm bore |
| Crank spindles it hosts | designed around a 30 mm spindle; 24 mm and 28.99 mm cranks need a reducer | 24 mm Shimano Hollowtech II and 24/22 mm SRAM GXP natively; 28.99 mm DUB via a DUB BB86 unit |
Questions and answers
How do Shell Bb30 and Shell Bb86 compare?
Shell Bb30 and Shell Bb86 differ on 4 specs: shell inside diameter, shell width, thread, crank spindles it hosts.