Bottom bracket for Specialised Sirrus X 5.0

[Mackiemill]

Hi - looking to replace the bottom bracket for my Specialised Sirrus X 5.0. On the bike's technical spec online it simply suggests 'BSA for 24mm spindle'. Grateful if anyone could provide an actual make/model I can just buy and fit. Thanks very much

[Brucey]

problem is that there is more than one 24mm BB spindle 'standard'. Eg both shimano and FSA use 24mm BB spindles, but they are fractionally different in size.

My advice is to get a BB which matches the crankset, and the frame threads. Note that BSA threaded bottom bracket shells can vary in width and not all BB cups will fit all widths of BB shell.

hth

cheers

[Valbrona]

State what crankset ...

[Mackiemill]

Thanks for replies. Crankset is 'Forged aluminium, 2-piece, 24mm spindle, direct mount chainring' (from the bike's tech spec sheet)