Join Date: Mar 2018
Location: Princeton, Texas
I also notice that when I check my slack day-by-day it goes up and down on its own. Is this some other force at work, or am I somehow getting a change in at rest suspension status (on relatively flat, paved ground)?
This is usually a sign of an unevenly wearing chain, usually referred to as tight spots. You will probably find that as you rotate the back wheel the amount of chain slack will vary, it usually means some links in the chain have worn or seized more than others and causes the tension to vary, a little variation is normal but if you are seeing a significant variation it probably means your chain is worn out and needs to be changed!! Sorry for the bad news, this often happens if the bike is left un-ridden for a long period of time, water gets in the chain and rust starts to form and then that area wear more quickly or seizes up.. If you get a new chain, the best thing you can do for it, is to set the correct tension and every few hundred miles rub some gearbox oil on the chain, you don't need an expensive chain lube (they cost a lot and cause dirt and dust to stick to the chain) just applying small amounts of gear oil to the chain will keep it nicely lubricated and will prevent wear and rust..