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Wed, 14 Dec 2005

Lessons in drivetrain wear, again - 22:10
If you let your drive train wear out well past the point at which the chain should have been replaced, the cluster and chainrings also wear badly and eventually your drivetrain reaches the point at which the chain skips whenever much power to it.

The drivetrain on my hardtail was well past the worn chain point and into the realms of needing the cluster and chainring replaced also back in May. Today I paid the price for avoiding buying replacement equipment for so long. Every time I stood up or tried to accelerate fast on my hardtail today the chain would skip, on the instances when I was standing my knees made painful contact with the handlebars and on one occasion I almost crashed on bitumen while accelerating.

I guess I have been somewhat lay in replacing the equipment partly because I have two mountain bikes to ride, so I have not paid as close attention to wear on one or the other and to KM ridden. It is my normal experience that approximately every 5000Km on a mountain bike, if you are not replacing the chain more regularly, the chain, cluster and middle chain ring need replacing. Then every 10000Km (another 5000Km later) the same replacement is required but the large chain ring and probably the granny ring also will need replacing. Sure it is possible to avoid this by doing more regular cleaning and replacing chains more often, it is possible to get as much as 20,000 Km out of a cluster and set of chainrings on a mountain bike. I do not however hold to those rather stricter maintenance regimes.

Ahh well time I guess to buy a new drivetrain for the hardtail. The last time I had the knee pain induced by meeting the handlebars due to worn drive train was a few years ago, I had forgotten how much it can hurt.

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