Taking SCARY out of used bikes, one bike at a time.

I have found several bad pulley’s on bikes this year. They are sometimes easily overlooked and the bike will shift okay.
It’s not a expensive fit, pulley’s range from $15-$30 in most cases. Plus it’s pretty easy to install. Just make sure it is the right speed and pulley’s are designed to be upper and lower.
A worn out pulley can cause bad shifting and could damage other parts of the drivetrain.