extreme chainring wear, is this normal?
so i was looking over my chainring (42T) on my single speed freewheel conversion and i've noticed about 4 teeth are mostly worn down. i put between 60 -100 miles a week on the bike and have been running single speed for around 3 months.
is this normal? i know i need to replace the chain, its old and has some links that are rusted (since it was the chain i got when i purchased this bike). i told the LBS where the conversion was done if the chain needed to be replaced to do it but he told me it didnt need it.
could that be causing an abnormal amount of wear and tear or did the LBS i went to sell and install some really low quality cranksets?