Which Post Mount Brackets Do I Need?

iLukeKendall

I'm about to pull the trigger on a set of Shimano XT Hydraulic disc brakes, after giving up on the Hayes Dyno Sport ones that came with my bike (literally no stopping power whatsoever after several adjustments).

I'm thinking of upping my rotors to 180mm at the same time, and wondered how to tell which mounting bracket I need? The bike came with 160mm rotors, so I'm assuming the existing brackets wouldn't offset the calliper enough?

supersonic

What fork, and what mounts are on it?

iLukeKendall

Fork is a RockShox XC32, where would I find a reference for the mounts? I'll be putting a brake front and rear.

iLukeKendall

Just looked on CRC - is this what I would need?

Rear: http://www.chainreactioncycles.com/shimano-mount-adaptor-rear-post-to-is-180mm/rp-prod17303
Front: http://www.chainreactioncycles.com/shimano-mount-adaptor-front-post-to-is-180mm/rp-prod17390

cooldad

Yes, if you are trying to fit post mount callipers to IS mount frame and forks, and using 180mm rotors.

iLukeKendall

The callipers are Shimano XT's, which I assume would be post-mount, and the frame is a 2013 Trek Mamba, which is currently using post-mount brackets for the Hayes brakes, so I'm also assuming this would be IS mount?

supersonic

You need to look at them and identify them, could be anything on the frame or fork.

http://mikemtb.org/porady/adapter/is_pm.png

iLukeKendall

Just taken a look; it looks like the rear is an IS mount, however the front is a direct mount for the current calliper (with a 160mm rotor). Could someone be so kind as to take a look at the attached images and confirm this, and suggest which brackets I would need? Thanks a lot

cooldad

Forks are post mount, frame is IS.

iLukeKendall

Thanks cooldad.

So I guess I need these two?

Front: http://www.chainreactioncycles.com/shimano-xtr-mount-adaptor-front-post-180mm/rp-prod54881
Rear: http://www.chainreactioncycles.com/shimano-mount-adaptor-rear-post-to-is-180mm/rp-prod17303

cooldad

Yep

iLukeKendall

Awesome, all ordered and hopefully on it's way later this week!

Thanks for all your help