Here is my current set up -
9 speed XT M770 Chainset
9 speed XT shadow rear
9 speed XT front mech
9 speed XTR shifters
9 speed XT 11-32 cassette
9 speed KMC X9L chain
I need to replace my front chainrings, chain and cassette as they are knackered and have got hold of some pretty much new 10 speed XT M770 chainrings.
Can I replace the middle and big rings on my 9 speed cranks with the 10 speed ones without getting into spacing issues?
I'll replace the granny ring with another 9 speed as I want to keep it 22 instead of 24 as I run 11-32 rear cassettes.
I'm sure my old ultegra 10sp had a thin chain, compared to the 9sp. Hence, it's going to rattle round those rings...I'm guessing?? If it were me, I'd not go ahead with it...get the correct bits.
🙂
9spd and 10spd rings are the same thickness, so no issues there.
I remember back at the time when 9spd came out (on LX and XT, not ridiculously expensive XTR) and everybody was banging on about how 9spd and 8spd bits would not work together. Well some wouldn't, but I needed a new chainset badly so bought a 9spd LX one and it worked flawlessly in an 8spd setup.
Personally though, your cheapest option is to sell the lot on here or on ebay, and buy a complete new SLX or XT 10spd drivetrain on the cheap off bike.de or rosebikes or somewhere. I bought a brand new XT 10spd setup for £290 all in last year, having sold off all my outgoing XT 9spd setup for about £200...
As above, I'd be tempted to sell it all on Ebay and just go 10 speed. I've done the same recently. bought new XTR shifters, mechs, chainset, chain and cassette(XT)for about £600 with CRC 10% discount. Got about £550 for the old 9 speed XTR stuff in total...
I tried to re-use my 9 speed XT cranks and just buy middle and granny 10 speed rings with outer bash, the rings themselves are no thicker, but the 10 speed chain is thinner, so it would drop down betweem the granny and middle rings and get stuck sometimes, managed to resolve it by spacing the middle ring towards the granny and now seems to work.
What scud says is true, the chains are different apart from both being 11/128" internal width....the 10-speed plates are thinner.
So, use the new 10-speed rings on your 9-speed drivetrain and it will all work a treat.
Or, just spend £500 on a new 10-speed set up and take your chances on getting something back on the 'bay.
PaulD
Mmmmmmm - Ok I hadn't thought of it that way.
I could buy a new 9sp XT cassette, the 2 smaller rings and new KMC chain for around £100 by shopping around.
My 9 speed XTR M970 shifters must be worth £90 as they're fairly new and mint. It just depends on what I'd get for other 9sp XT stuff I have.
I can get the latest XT transmission groupset for £325 from Germany. A lot more hassle but I'm tempted. It all hangs on what the existing bits raise. Decisions, decisions.
Thanks for that, I didn't think they'd be the same.
STW collective...awesome.