Bent sprocket???

BigWaveMark said:

I had my bike in the shop to have my crankset replaced. On my next ride, just miles into it, one of my front sprockets bent. Anyone ever heard of this before??? I didn't even know this could happen.

I'm not sure if it was just like a defected sprocket or maybe the person who worked on my bike tweeked it a bit when they were fixing my bike.....

You mean one of your chainrings collapsed? Which one? How? If this happened during normal pedalling, then you should take it back to the store and have them fix whatever it is they did. You are right, this should, and could, never happen unless something is very wrong with the way the crankset was assembled.

Matters may be different if this happened during shifting. Then it all depends on the specifics. I would say that it is still execeedingly rare for somebody to bend their chainrings, but I suppose it could be done through some combination of bungled shifting and unreasonable force...

Maybe excessive cross chaining?

BigWaveMark said:

I had my bike in the shop to have my crankset replaced. On my next ride, just miles into it, one of my front sprockets bent. Anyone ever heard of this before??? I didn't even know this could happen.

I'm not sure if it was just like a defected sprocket or maybe the person who worked on my bike tweeked it a bit when they were fixing my bike.....

Okay, inquiring minds want to know -- what brand of crankset did you buy?!?

Was it the large ring that you bent?

What bike was it put on?

Post a pic, or two!

(thanks for the responses...)

I have a Giant Defy 3 with just about 350 miles.

Sorry for the wrong terminology, it was the smallest chain ring (front set). I was shifting from the middle gear to the smallest at the bottom of a steep hill so tension was high as I shifted.

I just took it to a local shop and learned I had other terminology wrong. Technically I had the bottom bracket replaced the day before I bent the chain ring.

They are going to look at it tomorrow but their immediate response was it was most likely just a freak accident. The replacement ring is only $15 but I'll upgrade that now.

This is the third time I had to take this bike into a shop and I've only been seriously riding for about the last month. First, the handlebars didn't move very easily. The shop where I bought it ended up adjusting bearings in the headset and that seems fine now. Then, I heard a small pop each time my left foot came up and it felt like I was slipping just a very little bit each time my left foot came up. That's how I ended up with a new bottom bracket. Now I bend a chain ring.

Good news is I'm learning a lot about road bikes. The only thing that really bothers me is I can't ride... I was on pace for 300 miles this month and all of these problems keep setting me back.