Did the chain come off the chainring or the largest (51t) cog?
Pics of the chainring and chainline would help a lot.
Pics of the chainring and chainline would help a lot.
1x12 Shimano and chainline issue
Right off the bat, I have to adjust a few things like shorten the chain a couple links and adjust the B screw. But this is what I initially noticed today and it doesn't look right:
I'm using a Oneup oval switch chainring on one of their boost (148) spiders, with Shimano XT 12 speed. I think the large cog is 52T or so. The bike is a 2021 Kona Process X.
Anyway, I noticed the chainline is pretty lousy on the largest cog, to the point where the chain fell off as I pedaled around the parking lot. Now granted, the chainring is used to having a 10 speed chain on it so it's possible things need to wear in a bit. But still, that chainline looks pretty extreme even though my hub is 148mm and that Oneup spider is made for a boost drive train.
Is it normal to have a fairly ugly chainline with 148 boost and 1x12??
I'm using a Oneup oval switch chainring on one of their boost (148) spiders, with Shimano XT 12 speed. I think the large cog is 52T or so. The bike is a 2021 Kona Process X.
Anyway, I noticed the chainline is pretty lousy on the largest cog, to the point where the chain fell off as I pedaled around the parking lot. Now granted, the chainring is used to having a 10 speed chain on it so it's possible things need to wear in a bit. But still, that chainline looks pretty extreme even though my hub is 148mm and that Oneup spider is made for a boost drive train.
Is it normal to have a fairly ugly chainline with 148 boost and 1x12??
1 - 6 of 6 Posts
Actually the chain comes off the chainring.
I did some reading and youtubing and it looks really bad chain lines are normal with 12 speed and boost.
I've also been reading that you need a specific chainring for Shimano HG+ chains. Damn. Luckily Wolftooth make them.
I did some reading and youtubing and it looks really bad chain lines are normal with 12 speed and boost.
I've also been reading that you need a specific chainring for Shimano HG+ chains. Damn. Luckily Wolftooth make them.
… or your chainring could just need replacing.
or that.… or your chainring could just need replacing.
Turns out I may have a 9,10,11 chainring whereas the new ones are 10,11,12 (including HG+).
edit. Yep, confirmed. I had the V1 chainring whereas the V2 does 12 speed.
This is how chainline is affected by chanrings selection
1 - 6 of 6 Posts
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