I have a bent chain ring on my bike, but luckly its the 25t ring. When I rode Thursday night, I went to shift down to it climb a good hill and it kept throwing the chain and I thought it was the derailleur. After look at it Friday I notice it was bent so I took it to the LBS and she was able to straighten it out. I rode yesterday, and went to shift down to it and it threw the chain. So i walked the bike up the hill since it was a group ride. I rode again today and I went to shift back to the granny gear and it threw the chain again. I noticed that the ring is bent again. Should I replace it or try to have it straightened out again? I rarely use it but its nice to have on steep hills.