Cycling: New chain and chain rings

I’ve finally got around to replacing my worn chain and chain rings/cogs on my bicycle. I have gone for 2 extra teeth on the front and one less on the back. This means I’ll be getting a few extra turns of the wheel for each turn of the pedals. 

Before putting the new chain on, I compared the two, and the old one had stretched by nearly 2 links over the whole length. No wonder the teeth were wearing away so much, and making so much noise when pedalling. 
On my test ride this afternoon, I noticed it was running a lot smoother. Though it does appear that the hub requires to be pulled apart again to be fully re-greased, though I’m maybe thinking that it will need to be replaced due to the wear.
There are a couple of photos of the old cogs below. Take a look at how worn they are.

Old worn chain ring Compaing old and new chain rings


  1. Those are seriously worn cogs. They should have been replaced about six months ago. The chain was overstretched as well. I usually replace my chain about every two months, but then again, I ride about 1,000 miles in that time span. The hub may need a rebuild, but not due to the chain problem. I think this is due to weather, possibly rain, were water is getting into the hub and contaminating the grease.

  2. Unfortunately 6 months ago I couldn’t afford to buy the new cogs and chain otherwise I would have replaced them. As I have an internal gear hub with no derailleur gears, I should be able to get more than 1000 miles out of the chain and cogs.

    Unfortunately I’m not currently tracking my distance travelled. Maybe it’s time I built an app similar to iTunes, just for gps tracks instead.

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