Advice on bottom bracket size?

DMC3000

Old School Hero
Middleburn recommend a 113mm BB for the RS7 crank (square taper) ...but... I'm only running a granny ring at the front (Middleburn Pro Trials) with a 10 speed cassette, so for better chainline think I need to go wider, to put the chainring in more of a middle ring position.

I was thinking a 122.5mm BB could work as this would move it outwards by 4.75mm (so a similar distance between inner and middle on a triple set up).

I'm hoping someone with more knowledge than me could suggest if this is reaonable or if not, any other suggestions before I end up having to purchase multiple BB's through trials and error.

Cheers

:D
 
I'd check the chainline with Middleburn as I think they correct the ring to a central position on the Trials setup.
 
Back
Top