Specialized Bottom Bracket

[Hardrock_rider_23]

Hi there
I recently bought a 2007 Specialized Hardrock medium size and i was thinking of buying a new crank system and bottom bracket so i can run a chain guide
It is a Truvativ ISOflow crankset with a Powerspline BB.
I was just wondrering if anyone else has done this and if they know what size the BB is as i really dont want 2 take my whole crankset off to get an accurate measurement of the BB
Thanks

[Matt H]

68mm.
(That means he'll need a 73mm bb + iscg adapter to run a chainguide, aight?)

If you want a heavier duty set of cranks and BB for that HR I'd suggest getting a second hand pair of hussefelts or holzefellers off the trading section on here.

[Hardrock_rider_23]

Yer im planning on Buying a set of Husselfelts (new) for $80 with Crank arms/BB/guard and chainrings
but i just need the other measurement as well, or does that not matter?
he came back to me the other day and said this

"Will suit 68/68e or 73/73e Bottom Bracket Shell sizes

Spindle Length: 136mm"

so anyhelp will be of great help