TT Bike BB Trouble. 73mm BB Shell?

[HarryJohnsonCycling]

Hi all,

I have recently acquired a 2015 Dassi TT frame. I've been slowly building it up until getting to the BB. The previous owner had it from new and claims nothing has been changed

Heres the confusion, the BB shell inside the frame is 73mm. This makes fitting a BB and Chainset very difficult.

What BB/Chainset combo can i use for TTs that fit in a 73mm BB shell? And if the worst comes to worst, whats the easiest way to trim it down to a 68mm

Notes:
Its not a stuck spacer at the end, the shell is 100% 73mm
I am idealy fitting a Vision Trimax Carbon Chainset, 24mm Axle

Thanks

 

[iluvmybike]

The shell width doesn't matter to your crankset - a standard crankset will fit both 68mm and 73mm bb. You cannot 'trim down' your frame from a 73mm to a 68mm! The only difference will be the number of spacers you might fit. The photo shows you have screw in bottom bracket cups. I don't know anything about your chosen crankset so you will need to check what it requires - if it is 24mm spindle width then that is the same as Shimano spindle widths

 

[Ming the Merciless]

73mm width is the standard width of mountain bike BB. A hollow tech 2 BB and crankset will fit.

 

[Ajax Bay]

As Ming says. If your Vision crankset is for a road bike (expecting a 68mm BB shell) then the 24mm spindle (attached to the right side crank spider) will not be long enough (obv).