http://www.ebay.co.uk/itm/40t-42t-sprocket-cassette-chainring-adaptor-MTB-7-8-9-10-speed-/111330573427?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item19ebd1bc73 has anyone ever tried one of these with a nine speed set up. it gives you a adapter to fit 40 or 42 tooth chainring on the rear. Thanks as I would like to keep my green xo mech as it mathes rest of bike and its cheaper than xx1 xo1:-)
I dimly recall it was someone on here making those adapters. Look a good idea if you happen to have some spare chain rings knocking about to experiment with
I bought one (and a 40T Deore Ring off ebay) with the intention of bodging a wider range 9 speed cassette together, the Mech (SLX) wouldn't stretch to 40T, 38 might be a goer and I'd have to have cobbled the cassette together with a new 12-36t HG61, which all started to make going 10 speed start looking relatively cheap.
Once I've got a 1x10 setup running I might try cobbling it on to that and see...
Also Spacing it properly and accommodating the chain ring bolt heads is a bit of a challenge too...