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I think they are 24/38 ratios - can I buy a single 34 ring for these? Not sure on the BCD but I don't think it is standard 104.
M980 cranks are standard 104BCD
M985 cranks are 88BCD
So yes as long as they are in fact m980s you can.
Yes the 980 trail chainset is 104 bcd. I ran a 34 oval for a while and have just dropped to a 32.
I believe it is the trail version, that's good news its 104 one less probelm
Yep. I've converted the trail version (double). The silver tabs won't fit back on, you'll just need some short chainring bolts.
Can they be run with a boost (52mm) chainline?
And if so, how?
If you're not running wide tyres then a normal crank will work with a Boost rear wheel.
If you need Boost then I have a new SLX Boost crankset I'm about to stick on the classifieds. It didn't take a standard 104 BCD ring though.
It should work with a 2.25 Schwalbe then?
I don't want to ditch my M980's, they are great cranks, but this 1x and boost is doing my noodle in.
The Race ones can be single speeded as well
Wolftooth do a lovely 88bcd chainring
Chainline can cause issues with some chani guides though
Yes, I have the M980 on one of my bikes its 104 BCD and works a treat with a single 32 10 speed or 11 speed with one bottom bracket spacer. I have had it work perfectly on a Nicolai Geometron and an Orange P7.
[quote=ScottChegg ]It should work with a 2.25 Schwalbe then?
I don't want to ditch my M980's, they are great cranks, but this 1x and boost is doing my noodle in.
Yeah- that should be just fine.