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The parts most likely to need an adapter
53%
Shimano Hollowtech II (24 mm) crank spindle needs an adapter or does not fit in 53% of the combinations we checked, the highest share in the dataset.
Which part most often needs an adapter?
Shimano Hollowtech II (24 mm) crank spindle tops the list: 8 of its 15 checked combinations (53%) need an adapter or do not fit. The full ranking is below.
| # | Parts | Adapter | No fit | Adapter-or-no rate |
|---|---|---|---|---|
| 1 | Shimano Hollowtech II (24 mm) crank spindle | 8 | 0 | 53% |
| 2 | SRAM DUB (28.99 mm) crank spindle | 2 | 1 | 50% |
| 3 | PF30 press fit bottom bracket | 2 | 0 | 25% |
| 4 | Specialized OSBB bottom bracket | 2 | 0 | 25% |
| 5 | Italian threaded bottom bracket | 0 | 1 | 4% |
| 6 | BB386EVO press fit bottom bracket | 1 | 0 | 7% |
| 7 | BBRight press fit bottom bracket | 1 | 0 | 11% |
| 8 | BB30 press fit bottom bracket | 1 | 0 | 17% |
| 9 | PF30A press fit (Cannondale Ai) bottom bracket | 1 | 0 | 25% |
| 10 | BB30A press fit (Cannondale) bottom bracket | 1 | 0 | 25% |
| 11 | BB392EVO press fit (MTB) bottom bracket | 1 | 0 | 50% |
Data as of 2026-09-06.