- January 18, 2019 at 11:00 pm #820803
Trying to figure out a slight problem I’m having with a Sram NX eagle install. I have some chain noise in the lower gears. Shifting through the hole cassette is butter smooth. B tension is good. Chain length looks good here are some pics.
The rear hub is a bikehubstore M270 which has been great for a low end mountain bike hub.
Waiting for the steel free hub body to come in stock also changing the aluminum axle to a steel version and new bearings. well i don’t think the hub is the problem. Any help much appreciated.January 20, 2019 at 6:17 pm #820808
NOT a mechanic, but my first thought on this is how is the chain line? If you’re only experiencing issues in the tallest cogs I’d suspect that might be a good starting placeJanuary 23, 2019 at 12:36 pm #820818
Chainline is a good start for sure. Are you using the SRAM chainring? If not, does your ring have the correct offset? What cranks?
The chain length looks ok, could perhaps lose a link yet. Unless this is a dually, where you need to account for dynamic ride position vs static. B-tension is clutch on the 12 speed stuff and every turn to adjust it affects position and cable tension as well. I find the upper limit needs to be adjusted in tandem with b-tension.
You’re welcome to pop in and i’ll help you get it dialed @carpetbomberJanuary 24, 2019 at 11:27 am #820823
The cranks are some old 960 XTR running a wolf tooth NW chain ring. Ill measure the chain line to see. With a 142mm rear end you need a 49mm chain line. With boost 148mm you need a 51mm chainline.
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