I need some new 6 bolt rotors due to a change in wheels & it seems there are some better bargains to be had on avid rotors, but i just need to know if the two are interchangable.
Its to go on M765 brakes.
ta
Yep, I run 160/140 G3s with my M985s.
Pretty sure there are no adaptors available to fit non-Avid brakes to Avid 185mm rotors. I've not been able to find any, anyway. All the other common sizes (203, 180, 160, 140) should be fine though.
(Someone please do correct me if I'm wrong, I have a 185mm Avid disc sitting around doing nothing because as far as I know I can't use it.)
I use some G2CSs with M575s and they work fine. The Avid rotors seem slightly thicker than Shimano's finest and the servo-wave action of the caliper/lever makes the brake a little bit grabby but if you like firm-feeling brakes it's not a bad thing.
Following on from my earlier post, in case someone searches this subject, I have now found [url= http://northshorebillet.com/products/disk-brake-adaptors/post-mount-disk-brake-adapters/ ]a 185mm post-mount adaptor[/url] that allows you to use a normal calliper with a 185mm Avid rotor on a PM fork. It's North Shore Billet so it ain't exactly cheap, but it's very nice quality and it's properly faced. I now have one holding a Shimano calliper in the right place on an Avid rotor and it's all working very smoothly.
For the record, I tried using the Avid adaptor and it is technically possible to get it set up if you use shorter bolts (I used the shorter bolt from the 185mm adaptor and a bolt from a 160mm PM adaptor). However, the faces on the Avid adaptor aren't faced square to the mount - the Avid cup/cone washers don't need it to be perfectly square. You end up with gaps on one side of the faces where the calliper meets the adaptor. I suspect this would lead to damage if you ran it like that for long, and snapping brake callipers/adaptors aren't my idea of fun...
The Shimano branded 180mm post mount to post mount adapter that I bought recently came with a set of special dished washers that the instructions tell you to put under the supplied longer bolts. These dished washers are just like the ones on Juicy brakes. If you put the dished washers between the Shimano caliper and the adapter it fits fine on an Avid 185mm disc. The washers fitted in this position move the caliper the extra 5mm. The Shimano adapter was 6.99 http://tinyurl.com/6wqmpgt
No warranty is given or implied on this mod but it has worked fine for me.
Avid rotor 1.9mm shimano rotor 2.1mm. When I used shimano rotors with my avids I got slightly less pad clearance, still usable though.
The Shimano branded 180mm post mount to post mount adapter that I bought recently came with a set of special dished washers that the instructions tell you to put under the supplied longer bolts ... If you put the dished washers between the Shimano caliper and the adapter it fits fine on an Avid 185mm disc.
Oh, ok. That's annoying. They should put that in the description somewhere, they'd sell more that way. 🙄
I'm in a similar boat - will have a hunt about in my spares box to see if I can find said dished washer.
Do you reckon any harm would come from using a straight forward washer (well, two) to 'lift' the caliper teh extra 2.5mm needed?
DrP