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#1 Question: inner diameter rear brake calipers 1 3/4"

Posted: Sat Jun 06, 2026 4:51 pm
by wagstefan
Hello chaps,

I wonder what inner diameter the rear brake calipers / diameter are supposed to have, if given as 1 3/4".

There are some on the market with grinded away casting numering after the "1" and stamped 3/4. But inner diameter of the caliper is said to be 47,5mm. But this is actually 1 7/8".....?
Or are the calipers that bigger to make spare for the sealing and the pistons are 1 3/4"? But thisvseems odd to me.

Thank you for any comment!

I wish you a nice weekend!


Stefan