This weekend's riding was cut very short by a broken chain, and when I was looking at putting the new one on I noticed my old crankset was missing some teeth and a little banged up and could really stand to be replaced.
I goog'd some info on replacing the crankset, and realized my bike predates most of the info I could find. I feel more than comfortable in replacing it myself, but I don't want to buy replacement that won't fit.
So here's some pics. It's an older Diamondback Response, with a 3×7 Shimano gear set. The crankset is a 42/34/22, I'd like to find something similar. TIA.
by SpicyNuggs42
3 Comments
You don’t have to replace the entire crankset, just the chainrings. You can usually find new old stock 5-bolt chainring sets on ebay. Just look up how to measure the ‘BCD’ before ordering.
You don’t appear to have any missing teeth. Those two shorties on the left side of photo 1 are shift aids. That crankset only has two shift gates, so I suspect you have the symmetrical short teeth hiding behind your crank arm.
Those rings were never great (very early shift aid designs), but are in very good condition. In a perfect world replacing the rings would be the cheaped option, but it’s likely cheaper to buy an entire new 9sp triple crankset. Not that I would, because like I said I believe those teeth are near mint.
In the second image of the bike, the crank looks cracked near the bolt at the 4 o’clock position. It could be dirt or a scratch.