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I have tried Wiggle and CRC but both have given me wrong information and delivered the wrong adaptor so I thought I'd get the correct information from the experts here.
Simple really, I have a fork with a post mount fitting and a disc caliper with an IS fitting. I have a 203mm rotor installed.
I want the correct adaptor for this setup and can't seem to see one anywhere. So that's Post Mount fork, IS Mount Caliper and 203mm rotor.
Any advice welcome.
Thanks, Mark
depends on the brake and the type of standard post mount....
More info needed, what fork and brake
I have a Fox Float 32 PM fork and an XTR M965 IS caliper with a 203mm disc. What you need is an IS to POST adaptor, code SMMAF203SP (I think), looks similar to:-
[img] 
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They seem a little thin on the ground though.
[url= http://www.bikediscount.com/ItemDetail.aspx?culture=en-GB&ig3=Brakes&ig2=Diskbrakes&ig1=Shimano+Zubeh%C3%B6r&desc1=Shimano+Disk-Adapter+SM-MA-F203S%2fP&ig3id=11&ig2id=58&ig1id=224&iid=4079&mi=0&hasv=0&webi=0&pr=0 ]HERE[/url]
Thanks Bigyinn, I'll Google that adaptor and see if it looks right. In case it isn't, mikewsmith, I wasn't aware that there are different 'standards' of Post Mount. The fork is a Marzocchi Bomber 55 and the caliper is a 10 year old XTR.
there are 2 PM spacings, but I think you have the normal one. It should just be a case of picking the right one (size on the side) what size rotor would the brake work on un spaced?. If your having trouble there is always the unfashionable LBS you will walk out with exactly the right thing that way.