Ended up being and E20 torxcant remember the size, 12mm / 13mm but a 12 sided socket will fit, just as good as a torx socket.
Thanks for the size confirmation, its hard to tell if E18 or E20 when crusted with rust.Ended up being and E20 torx
Thanks. The originals are 26.6mm and, because I thought they were readily available, I didn't check yesterday if longer bolts would foul anything at the rear.The bolts can be replaced with off the shelf high tensile ones, there's nothing special about them.
Great advice thanks. I'm assuming coarse thread being where they are.I would use 30mm with a washer. A 'form A' washer would give an effective length of 27.5mm, I would expect that to clear but I can't check as my setup is slightly different to stock.