35-54-37.5/35-54-39 bb axle?

For discussions about bikes and equipment.
craigh
Posts: 2
Joined: 23 Oct 2014, 10:01pm

35-54-37.5/35-54-39 bb axle?

Postby craigh » 23 Oct 2014, 10:22pm

If I replace the 128mm ('5T') bb axle on a cheap old hybrid with a 126.5mm ('5S') axle, will I notice any difference? Should I put a 1.5mm spacer between the r/h bearing cup flange and the frame, which would transfer the 1.5mm reduction in length to the l/h side?

LWaB
Posts: 121
Joined: 26 Nov 2010, 5:33am

Re: 35-54-37.5/35-54-39 bb axle?

Postby LWaB » 24 Oct 2014, 8:58am

If you don't have >3mm of clearance at the chainrings/ RH crank to the frame, then use a spacer. Otherwise run it as it is and readjust the front mech.

craigh
Posts: 2
Joined: 23 Oct 2014, 10:01pm

Re: 35-54-37.5/35-54-39 bb axle?

Postby craigh » 24 Oct 2014, 11:15am

Thanks!