(above) I use synthetic when I can. I know that after I changed the manual trans fluid on my car (which used auto trans fluid) to a synthetic, the next fluid change 50,000 miles later the drained lube looked like new, clear red, no gray particles like the first change.
My '89 road race bike had an Unilide cassette (pre-hyperglide), teeth were just a bit twisted at the tip, no ramps, which it didn't need because not big jumps. No lockring, high cog is threaded. Anyway, after 15 years of use with the same cogs and chain (I never measured the stretch, not aware enough then) and tens of thousands of miles, I noticed wear on the cogs, but then just reversed them, which you could do on IG, and bought a new chain. Those cogs are still on that bike, it's retired in storage while I use my townie with panniers. I don't know if I can even get an UG 7 cassette any more. I'll have to look on amazon. Looks like not! I'd have to convert to hyperglide.
Last edited by Duragrouch; 03-04-24 at 01:28 AM.