Disc Brake mount help needed !!

SpecializedJake

Hey guys and gals.
I've decided that I've finally had enough of my terrible avid juicy three SL's on my now 5 year old Specialized Rockhopper comp disc. I've decided on the Shimano deore M615's to replace them. However my Question is what adaptors do I need ? I'm currently running 160mm rotors front and rear however I would like to go up to a 180 on the front for the increase in power as my local trails have a few quite fast descents. I believe my fork and frame both have IS mounts but I'm not quite sure. Also am I correct in thinking that all I need is
Brakes
Rotors
Adaptors
I have attached a picture of my rear disc mount. I don't know if it might help someone Identify the adaptor I need.
http://www.evanscycles.com/products/specialized/rockhopper-comp-disc-2009-mountain-bike-ec016419#features
Thanks in advance

nicklouse

If the fame size rotor on the rear use the adaptor you have at the moment.

Re the front it depends on the mount ANC axle.

Some reading for you

viewtopic.php?f=40073&t=1590919

benpinnick

This is is guess work... Don't blame me if it's wrong. Front, you think it's IS. If it looks like the rear, ie sideways bolts into a mount that then bolts (at 90degrees) to the caliper... It is. If there's only two books and they screw into a thread in the fork leg posts then it's err.. Post mount.

If you are 160 rear all you need is brakes, front IS180 mount, 180 disc for the front. The back can reuse disc and adaptor.

SpecializedJake

Thanks for your input guys very helpful
I can safely say that both mounts are IS
However I think I may have found a solution in the form of a hope adaptor
Specifically this one http://www.chainreactioncycles.com/hope-post-mount-to-is-disc-brake-adaptor/rp-prod13737
Can anyone tell me if this is what I need to run post mount calipers on IS mounts ?

cobba

180mm front adapter: http://www.chainreactioncycles.com/shimano-mount-adaptor-front-post-to-is-180mm/rp-prod17390

You can reuse the rear Avid adapter but don't reuse the CPS washers, they aren't needed with Shimano brakes.

The Rookie

And you'll need shorter bolts without the washers in place......