Chinertown
Chinese Carbon MTB => 29er => Topic started by: Rastaruss on December 22, 2024, 05:00:47 PM
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Hi All
First post
I'm building a Carbonda 707 as a gravel/bike packing rig.
As such, I'm after a crank that can handle a 38 tooth + a 32 when I load 12kg of gear & ride hilly bike packing routes.
I'm told by Wing the chain line is 43.5mm.
Anyone know if I can use any Shimano cranks with the above chain rings ?
Maybe a XT x 165mm ?
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I use a GRX 600 crankset with Ultegra BBR60 bottom bracket on my 707. No problems.
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I would not use a MTB crank. The diameter is larger so you would have to use spacers in any case.
There's plenty of solutions, e.g. the already suggested GRX.
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MTB cranks have different spindle lengths/chainlines and Shimano crank spindles only detach on one end so you can’t just get a different length one like you could for, say, Raceface Cinch. AFAIK it’s not possible to get the chainline you stated with MTB cranks.
Typical MTB BBs are also 73mm whereas typical road/gravel, and the 707 specifically, are 68.
Chainline precision matters a little less with 10/11spd drivetrains on MTBs, particularly gravity bikes, but with one that’s constantly being pedaled and shifted you’re really going to want to have the angle correct.