Here's my dilemma. I've purchased a San Andreas frame from a friend of mine and he gave me a rear disc brake adapter with the frame. I recently installed it on the frame but to my great disappointment, I can't fit a set of Hayes HFX-9 with an 8" rotor on it.
I've tried to use a Hayes caliper adapter (74-23) on it but I can only use the bottom bolt to hold it onto the brake adapter. (see the pic)
I would have to grind down the top of the Hayes adapter to bolt on the second bolt but if I do so, the caliper will rest on top of the rotor and the wheel won't spin freely.
Any idea or suggestion would greatly be appreciated.
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