Is there high or low friction on a bikes tire?

Answer 1

it depends if your tyre is fully pumped or halfe pumped and weather it is a thin tyre or a fat on

a thin tyre wouldn't -less surface area

a fat tyre would-more surface area is on the ground

so really it depends

Answer 2

You don't want a low friction tire at either place. Low friction means that the tire will slip, which will lead to loss of control and possibly a crash.

If you can't avoid it, low friction is a little less disastrous at the back than at the front. The front wheel getting away from you is more certain to lead to crash than a rear wheel slip.