51mm IS rear disc mount specification?

[goose]

Hi All,

I've bee searching all over for a while, and I can't find the specification for the hole location for a 51mm IS rear disc mount. I figure you'd need the axle axis based bolt circle diameter of each hole, along with their angular relative angular positions. I'm trying to design a dedicated 8" mount, similar to the megamo/simtra production mounts, or Tomac's custom mount this thread:
http://www.observedtrials.net/vb/showthread.php?t=13296&highlight=5.5

Any help?

Thanks!

goose

[thetart20]

http://www.hayesdiscbrake.com/pdf/Rear%20QR%20IS.pdf

Then just increase the distance of the top and bottom holes from the dropout by 20mm each :)

Adam

[goose]

Great! Thanks Adam!

Dang, and I searched around on the hayes site too, dunno how I missed that one. While on the topic, an 8" rotor is 203mm. Is a standard rotor 160mm? Or is it 6" which is more like 152mm? Why does simtra use a +40mm, not a +43mm???

g