Something wrong with the angle of the front wheel.

On a bike with a bent frame you can sometimes fix the pulling right
or left by deliberately angling the wheel in the dropouts. Conversely
if the wheel is angled accidently in a straight frame it will pull
left or right.

I don't think the rear wheel has much effect on pulling, though it can
make the wheels not track each other. It's a second-order effect
otherwise.
--
Ron Hardin


On the internet, nobody knows you're a jerk.