they are only 3/8" long. not long enough to make the tires leak. the knobbier are 1/2" or so tall. had 1/2" ones in my tracked grizzly. they did well. didn't throw any. but i am sure if you are trying to break it loose it could. my buddy runs them in his atv too. screws in the front chains in the rear. they are good for about 4-5 years is what i have seen. till they start getting dull. but if you replace them then you need to glue them in. or you will loose them. i only use them in the winter ice fishing.