MegaSack DRAW - This year's winner is user - rgwb
We will be in touch
Hi just a quick query
I am up grading my fork to a pair of 2016 revs from my old 2007 fox floats, I have a pair of m975 xtr brakes with 160 rotors but am not sure if they are post or IS mount. As I am up grading to qr15 I need new wheels as my old ones are shimano centre lock hubs I need a new disk, as I am buying hope hubs.......it has all got very complicated all of a sudden
Not sure what happend there basically I want to enlarge the rotor size but not sure what adaptor to buy? Any thought would be grand, cheers Chris
[img] 
[/img]
Hope Hubs, so you'll need a 6-bolt rotor.
Your 2016 Revs will be Post Mount.
Your M975 caliper will almost definitely be Post Mount (a photo would help)
This is IS mount
[img] 
[/img]
This is POST mount
[img] 
[/img]
So, if you want to keep 160mm, just buy any 160mm 6-bolt rotor.
If you want to go up a size, buy a 180mm rotor and a +20mm Post-to-Post adapter.
You want IS to Post Mount. Follow the link below and make the selection based on which disc size you want...
http://www.chainreactioncycles.com/shimano-mount-adaptor-front-post-to-is/rp-prod13743
Your M975 caliper will almost definitely be Post Mount
You sure? All the pics on Google suggest it's IS.
[quote=teasel ]
Your M975 caliper will almost definitely be Post Mount
You sure? All the pics on Google suggest it's IS.
Both variants were available. The IS mount was most commonly used on the rear. I have two bikes with 975s on. Each has a Post front, IS rear. However, I hoped that providing the images above would answer the question to the OPs satisfaction.
Both variants were available.
Ah, I see. In which case... as you were.
Edit : Heh. Scrolled down for a few more secs and what do I spot...?
Speed searching, eh.
Thank you all for the chuccle and very informative info! You guys are the best