[Jeffva]

Building up a new ride and have some XTR disk brakes vs. new Fox Talas fork...so I need to do an adapter from 74 post mount on the fork to 51mm IS on the caliper? Current rotors are 160mm.

Found an adapter on JensonUSA (Front 74mm mount, 170mm rotor, 51 mm CLPR)? Item# BR407Z47 - Would this be the part I need and would it come with a 170mm center lock shimano rotor? Yea, I'll call them tomorrow but wondering if anyone has gone thru this.

http://www.jensonusa.com/store/product/BR407Z47-Shimano+Fork+Disc+Brake+Adapters.aspx

 

[Jeffva]

Or this one?

http://www.universalcycles.com/shopping/product_details.php?id=18669

First on the list:

18669-42783
160mm / 74mm / Front / 51mm IS / SM-MA-F160P/S

 

[Speedub.Nate]

Yes, if your XTR caliper is a 51mm IS, you'll need the adapter you identified to make it work with a 74mm Post Mount fork.

That price is criminal! But it appears to be the going rate on other websites. Unfortunately, you're on the hook for the rotor (I'm pretty sure -- the other adapters don't come with rotors, though they're all quite a bit cheaper).

 

[crisillo]

yeah, if your fork is PM and your caliper 160mm IS front, the smaller rotor you can run is a 170mm

IIRC, the 170mm rotor is only available in 6 bolt, not centerlock.

Chain Reaction has both the rotor
http://www.chainreactioncycles.com/Models.aspx?ModelID=756
and adapter
http://www.chainreactioncycles.com/Models.aspx?ModelID=13744

Personally, I think it is cheaper to just go for a 180mm conversion.

 

[reptilezs]

its much cheaper to got with the 180 adapter and rotor for around ~17

 

[Jeffva]

Thanks for the info...I'm going to rummage through some parts at friends house and if not will probably do the 180 convert.