We have a tuner here in the UK, and he has to supply the 26 kits with two sizes of rear guide and piston seal. All other parts, (spring and top hat), are the same. Luckily, for those without measuring instruments, we have discovered that our British 2 pence coin fits into a 26mm tube, but not a 25mm. Easy way of testing. :emoticon: :emoticon: :emoticon: HW95/R9 kit will fit a 26mm, only piston seal is different. :emoticon: