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I'm building up a Bird Zero, when I've mounted the Zee brake Calliper it's only just touching the very edge of the disc. The disc is a 203 and so is the PM to PM adaptor. Forks are 2018 Rockshox Relevation.
I'd post a pic if I could work out how!
front brake mounted on rear adaptor ?
The fork will be a 180PM not a 160PM so you'll need a different adaptor.
160 to 203 adaptor in a fork with 180 mm minimum rotor size?
EDIT: 41 seconds...
So I'll need to get a 180 PM adaptor?
You need a 180-203 post mount adapter. Or you can run a 180 disc with the caliper mounted directly to the fork.
You should be using a 160 to 203 adapter pm-pm. Is that definitely what you have?
Edit: seems to be differing info about what size mount the fork comes with. Sounds like you need a 180-203 pm-pm as above
Hope adapter H for 160mm to 183mm on a 180mm mount gives you 203mm rotor spacing.
2018 revelations are 100% a 180 post mount, so as all the other replies, a 180->203 adapter is needed, not a 160->203.
or...just leave it as it is and mop up all the downhill segments in your area on Strava?