using 140mm rotors

[rowdyflat]

My new e bike conversion has to use a 140mm rear disc due to the wide hub motor to not rub in the frame .
Can I just use any old hydro rear brake with the appropriate adapter , I have a spare Shimano XT ?

 

[Mattyp]

alot of frames are made for a minimum 160mm rotor with the brake calliper being mounted direct to the chain stay. it really depends on the frame, and ofcourse post mount or IS mount

 

[SummitFever]

Shouldn't be a problem. I used a 140mm rear rotor on my 26" bike (still do) for years with an XTR caliper and the appropriate 160F/140R ISO to PM adapter. However, if it's a PM frame then typically the minimum rotor size is 160mm.

 

[rowdyflat]

Thanks 26 ISO to PM so OK.

 

[rowdyflat]

Are IS 160Front all 140 rear as well ?

 

[SummitFever]

Yes.

 

[rowdyflat]

Thought so but it doesnt seem quite right.
The taller end should go to the rear ?

 

[The Duckmeister]

Yes.

 

[rowdyflat]

Discovered the problem was that the ehub body is too wide and hits the brake caliper without extra spacers