HELP – which hope adaptor?

Hello,
Could someone please tell me which adaptor I need?
I have an 08 Fox 32 Van R, I think with IS mount?
I also have 203mm hope floating rotor.
I think I need an IS to IS mount, but +20 or +40?
many thanks,
BH

+40

Thanks Pete,
You’ve saved me alot of fuss.

Erm, my ’08 Floats are post mount (same lowers as Vanillas)
What calipers do you have on there?
If the caliper has the bolt screwing in to it, its an IS caliper, if the bolts screw in to the post on the fork leg is PM (post mount).

The adaptor you need will depend on the caliper – what type and size rotor is it designed for?