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So my drivetrain is about ready for an overhaul on the Whyte and i am thinking maybe 1 x 10 or 2 x 10 Shimano.
I already have full xt M770 set up. My questions are:
Will the M770 rear mech with new jockeys work with the 10 speed chain and cassette? Cant see why as the distances covered are the same, its the shifter that controls the indexing.
I guess i will need new front ring / rings as the 9 speed m770 ones will be too thick?
If i go 1 x 10 with a 34t front ring and 36t cassette am i going to miss much of the granny ring? I dont really use it that much. The gain ratio for 34 x 36 is 1.8 and 22 x 34 is 1.2 so not a huge difference.
Anyone using this set up? Or maybe 26t and 36t front rings and 10 speed rear?
New mech needed, pull ratios are different.
Ah ok, thats fine as i can flog my xt stuff as a full set but i always thought the shifter controlled the cable pull ratio? the cable just comes straight into the mech as per the M770?
Its what I thought as well as others, but no, clever people informed us that you do need a new mech.
If I do go 10 speed I'd probably just try and run my 9 speed mech before putting the 10 speed mech on, just to see if the world ends.
[i]just to see if the world ends. [/i]
careful you don't incur the wrath of njee...
Why would you need a new mech, the cassette is no wider and the shifter is what indexes the mech.
The extra 2 teeth shouldn't pose too much of an issue surely?
As for pull ratios are we talking about the actuation ratio?
the pull ratio is different on 10 speed shimano.
i run a 1x10 setup and at the moment run a 34-12 rear with a 9 speed 32t middleburn chainring. the chain runs fine on the 9 speed chain ring. This seems to give me the gears i need for the area i live in and suffered no lack of gears riding Brechfa a few weeks back.
i use the XT 10 speed rear mech because as i understand it, the cable pull from the lever is different because the rear mech takes a different path while changing due to the linkages on the new 10 speed stuff.
Also the setup is straight forward using all 10 speed stuff.
Thats helped a lot jimr80 as i wanted to run a middleburn uno but didnt think the rings would work. Only thing is they only make a 32t for the uno. Do you not spin out on the descents with 11 x 32?
you don't need a new rear mech. I'm running a 10 speed LX cassette on my cross bike with a 3 year old XT 9 speed mech.
Don't know if it helps but I have 10sp 105 shifter, 10sp Ultegra cassette and 9sp XTR shadow rear mech on the road bike and they get along just fine.
Is road stuff different?
Not really , if i'm going fast down hill enough to spin out i'm not normally pedaling. If its a long gradual decent where your constantly pedaling then yes ,but i'm not so sure having one more gear in effect would make much difference.
i intend racing this setup in a couple of weeks so that might highlight the lack of gears and if thats the case i'll just swap the chainring for a 34t and maybe change to a 36t rear when it wears out.
Apparently 9spd mechs work with 10spd road shifters. You need a 10spd mech to use 10spd MTB shifters: cable pull is different.
To change to 10spd you'll need new rear mech, cassette and chain. 9spd chainring should be fine.
I've just gone 1x9. Biggest gear 32-11: I don't need anything higher. Depends what you're riding though: if you're a secret roadie or have got have a twisted love for smooth fireroad descents you'll spin out.
I run 32t front and 11-34 rear and no I never spin out on descents either unless like jim says it's a road or baby smooth fire road at which point it's hardly worth worrying about. I've run the bike in the alps and various dh courses in the uk so it's not like Ive not been places where you'd need big gears. I would however like to go to a 36t rear as I do struggle on longer steeper climbs.
Last question, Ultegra 10 speed lightweight chains, any reason why not instead of an HG94 mtb specific.
all i can say is that the mtb 10 speed chains are surposed to be directional, in that the inner plates are thinner .
But that dosen't mean a ultegra chain won't work.
Are they cheaper ?
£19.99 for ultegra. Bit lighter as well.