Adapter for 180 to 200 rotor

BurnieM

Likes Dirt
I currently have a Shimano MT520 4 pot calliper and a Shimano RT66 203mm rotor.
It has a Shimano SM-MA-F203P/PM (+23mm) adapter.

I am wanting to try a SRAM HS2 200mm rotor.
While I could leave the current adapter I believe I would loose 1.5mm of pad sweep but it would work.

I would like to go to a +20mm adapter.
Looking at a SM-MA-F180P/P2 Shimano lists this as suitable for 140 to 160 and 160 to 180.
Shimano has a different adapter for 200 to 220.

Would a SM-MA-F180P/P2 work for 180 to 200 ?

Why not just use a SRAM adapter ?
SRAM are $40 and Shimano are $15.
 
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