Hi Specs

[ecliptics]

The rear ST discs are 280mmX10mm and are the same as the ones RTR supply for the front of the Rocket for use with the Hi Specs.

As for the rear discs you need, I don't know as I used the focus calipers.

hope this helps.

[andychalmers]

If your using alloy front uprights then you need specific discs from RTR or rally design. On the back with hi specs you need the 280mm focus front ST disks.