I know this has been somewhat done to death, but here’s my current problem:

Old two part #3 Hope M4, 2010ish 20mm Rev with PM, A-Z caliper adapter (the one with zero upsize)

Adapter fits fork – just – caliper won’t quite mount, it fouls on the head of the top bolt at the adapter against the section of the caliper body where the body half bolt is running through.

I’m not sure removing any material from the caliper body is a good plan, a lower profile bolt head into the fork might do it but I can’t find one – currently using the standard Ti taper head bolt that ships with the adaptor.

Don’t really want to change brakes or fork, do have a set of 200/180 rotors I could use if I went +20 which I think would solve the issue, but I really don’t need 200/180.

What would STW do?

plus 20mm with this:

probably the +20 but have you got a pic of what is fouling up? I think I get it but someone might have a cunning suggestion if you show us.

Head to the bolt supplier.

Just get a kcnc adaptor from clee cycles. Works great.

How much extra clearance do you need on the bolt? Would a dome head do the trick?

Sorry… My bad. It is the kcnc from flee that’s in use. A lower profile head would probably sort it.

Pictures in a bit. Late shift this week :/

Sorry… My bad. It is the kcnc from flee that’s in use. A lower profile head would probably sort it.

I’d try a button head bolt. Looks like that will still be close, though. Shimano do an ultra low profile bolt for one of their adapters which should do it.

This one:

😀 that looks like it might do it!

Where would I get such a bolt?

Actually, would something like this work? It is an m6, right?

http://www.ebay.co.uk/itm/281347510941

Gone with some M6x16 hi tensile button heads for now to see if this works.

If not, any real reason not to investigate countersunk hi tensile screws apart from needing to countersink the KCNC adaptor?

Hi Tensile button head saves the day… Just!