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Chainring question

G-Cracker

Monkey
May 2, 2002
528
0
Tucson, beatch!
Hey all...

I was closely examining my new (used) bike and it's crankset. On the large chainring, I noticed that two of the teeth are smaller and angled differently than the rest of the teeth. It is the original Shimano STX crankset for my Raleigh M-7000.

I thought that it was maybe they were broken or worn badly but it was just those two teeth.... the rest seem fine. When I shopped online for a new replacement STX crankset (Nashbar has it on sale :cool: ) I noticed that it also has the same two different teeth.

I know I'm showing my glaring newbie-ness here, but is this normal? I can only assume it helps in shifting, yes?

Thanks for your help!