[nmmtnbiker]

just picked up a gt idrive frame and am wondering what size bottom bracket the thing uses. also should i go splined or square. thanks mike

 

[peter6061]

it's 73mm x (what cranks are you running?)

 

[Motionboy2]

Go splined! Easier to get at this poing and there is more surface area in contact making a better conection

 

[crazybastard]

get splinned it is way more reliable and stronger

 

[WTGPhoben]

SPLINED (best decision you'll ever make)