Gears don’t always smooth the way

So I was lubricating my chain, and I happened to notice the 11 tooth cog had a significant wobble.

The gear would of yen catch the chain when back peddling the bike. So, a bit of investigation was in order. Taking the cassette off the freehub, it was obvious there was a lot of ring bite into the freehub splines. This is where the force of peddling the bike causes the mounting lugs on the cassette to wear a grove into the freehub splines. Not a massive issue on the middle cogs where it often occurs.

However, the 11 tooth kinda sits off the hub, and looking, there was some big gouging on the splines causing the cog to sit angled. So I tried filing off the worst parts. But this didn’t help, causing the lock ring to be angled on the cog.

So, the only option is to replace the whole freehub, and luckily I had a spare wheel available. So a quick change over, and ensuring the lock ring was REALLY tight, which should go some way to completely clamp the cogs down, keeping any movement to a minimum, hopefully should be the end to cassette wear.

Chain woes

Recently, I decided to replace both the chain and cassette on my bike. The chain was worn, it could be lifted off the large chainring, and thought I’d do the cassette at the same time as it too had worn.

I didn’t however check the chain ring. I’d last changed the inner ring back in 2017. Now, almost to the day, it’s needing changed again. I immediately recognised the sound, but it wasn’t as bad as last time, but the same grind noise I heard back then, so realised the chain ring was clearly on the way out.

Riding, gives a distinct metallic scraping noise from the front chain rings and looking at the teeth you can see a wear pattern. The new chain has trouble meshing with the wear, giving a scrape as it tries to settle in.

So, it might get better as the chain beds in, but I’ll change the ring.

A good clean out of the bikes drive chain and a new bottom bracket, as you might as well while your crankset is off.