You are reading a single comment by @TRA and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@TRA
New bike build (steel track frame) with really annoying noise from drivetrain.
Details: DA 7710 cranks with 50t DA chainring and at the back a surly 18t cog both 3/32. Chain is a KMC 3/32 specific chain.
The noise is like the rattling of metal mudguards when pedalling, more so under load. A high pitch vibration. And the noise does appear to be cyclic. I've made sure the chain is tensioned with just a little slack - everything moves freely. I do notice that when turning the cranks the chain tension does vary, indicating a less than round chainring. thing is, I figured DA should be fairly round.
Chainline appears (to the eye) to be straight. Possibly there is a millimetre of deviation.
Ideas?
Long story short, I've checked most things, re-fitted components, cleaned and then double checked again and it's still there.