底部支架和曲柄造成污物跳線


1

我正在尋找一輛NS Decade越野摩托車。我對購買右下角支架和曲柄套件感到非常困惑。

鏡架規格為 73mm螺紋

理想情況下,我想使用30mm Raceface曲柄(因為它們比BMX曲柄便宜)。

我應該選哪個?這些選項中的任何一個對此框架有效嗎?

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這些曲柄行得通嗎?

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似乎建議我為73mm的外殼買這個?

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3

A 'threaded' bottom bracket shell on modern frames means an ISO standard threaded shell aka 'BSA' or 'English'. Standard shell widths are 68mm, 73mm, 83mm or 100mm.

External threaded bottom brackets are usually used with 24mm diameter crank axles (Shimano Hollowtech or SRAM GXP), but 30mm axle cranks do exist - as you know because you found 30mm axle bottom brackets.

The crank you referenced has a 24mm axle so it won't work with any of the bottom brackets in the first set, however you correctly identified the bottom bracket it does need to fit in a threaded 73mm shell (RF-2925).

If you want a 30mm axle you need to identify the equivalent 30mm crank, the documentation should point you to the correct bottom bracket which should be RF-2881.