So, my Enduro currently has a 30.9mm Thomson seatpost. I want to fit my gravity dropper that is a 27.2mm post… what size shim do I need?? Can’t seem to find a 30.9mm to 27.2mm, or am I blind? cheers for your help! 🙂

You need a 27.2-30.9 shim.
USE make one, product code SSX309

Edinburgh cycles do them i think. Must do as i have one from them sat it the garage in the same size.

yeh, I reckon you’re blind

are you buying a new GDropper? – I thought they came with a shim anyway

yep… I’m blind (and lazy of course 🙂 )… I’ve had my GD for a couple of years now, it came with a 31.6mm shim, no good for my Enduro 🙁