The SO has XT calipers on her bike – they are about 4 years old so I think they have changed. The pads have the hole for the pin at one end, not the middle.

The pin is an allen bolt that you screw in, secured by a mini R clip – or was, until the R clip was lost

All new pads I have seen come with a split pin – is this what I am meant to use as a replacement for the screw in pin? Or where would I find a mini R clip

cheers

i think the clip is just an extra security measure, the split pins can be used instead of the bolt, but the bolt’s better if you still have it.

Ebay!

Split pin does indeed replace the bolt, but are a bit more basic.

Split pins as used on LX? They are a very good solution. (Simple engineering is often the best solution). They have to be only “set” about 1-2mm, enough to prevent them falling out, and thereafter will spring into line when you remove them, and are very easy to re insert.

Re-use the same pin forever.

Shimano part number Y-8CL 98070 (Pad Axle & Snap Ring) for the pin and the “R” clip. I don’t like the split-pins!