AMP Research research

Looking at the D1 instructions there are only two “calliper mounts” but I found a WI/RX hub on eBay last night with a 180mm rotor.

There must be different/longer options as this is what’s done with the adapter plates on modern bikes. Something doesn’t stack up…
GT had a “special” but there are no part numbers on the ones I have. IMG_3206.png IMG_3204.jpeg IMG_3207.jpeg
I can't remember the numbers, but didn't the Rock Shox rotors supplied with the gold Rock Shox calipers have a different diameter to the original AMP ones?...and presumably a mount option to fit a 180mm rotor.
I had a client try to fit RS calipers and rotors onto AMP mounts on an AMP frame and they fouled like yours.

The RS rotors work fine with the ISO-fit mounts on ISO frames and forks, but don't run on AMP frames or forks with the original AMP mounts.

All the best,
In process of rebuilding my b3 with f3 forks and somehow I’ve lost the spring for the front forks . Anyone have for sale or where i can get something similar
No, I’ve been distracted with other protects... If you could let me know what size you have, I think that will help solve this mystery.