If the tires are moving in opposite directions when you try to move the mower there is one of two things happening. Either the mower is stuck in gear or the brake is hanging.
The more common is that the brake is hanging. If you can, have someone on the mower with it NOT running. Have them press down the brake pedal while you are watching under the mower and on the rear axle. There is a rod that goes to the brake assembly. The rod is pushing the brake linkage. Usually the bracket is stuck. You can pull it back forward and the brake will release. If it happens frequently you will need to lubricate the linkage without getting any lubrication on the brake discs themselves.
Changing a small lawn mowers tires will require you to first purchase new tires. Then loosen the bolts on the old tires. You can then take off the tires. Put on the new tires and replace the bolts.
Lawn mower tires are the specific tires that go on a lawn mower. The kind of lawn mower you drive. They are not as heavy duty as car tires, but they make it so you can drive around your lawn easily and mow your grass.
Pins on the brake disk on transaxle are rusty and stuck.
The bearing or the bearing shaft of the front wheels are not aligned and the wheel balance alos could be a reason that tends to wear out the front tires.
How to Change the Tires on Self-Propelled lawn Mower
I am not sure what kind of lawnmower you own, and tires do vary for the various lawnmowers. I did find a site that specializes in all kinds of tires including lawn mower tires as well as garden tractor mower tires. Hopefully this will be helpful: http://www.specialtytiresusa.com/lawn-and-garden/lawnmower-tires/
When the transmission is in gear and the tires are off the ground they go in different directions when spinning by hand Nothing is wrong - the same thing happens to cars and trucks.
If you are referring to a riding lawn mower, the manual specifies 12 - 14 psi in each tire.
i believe you are thinking of the Head and Shoulders commercial where the man riding the lawn mower says he is going to make tires with zero death ctystals. you can watch it here... http://www.youtube.com/watch?v=VzTXxZ3sNUI
Park the mower on level ground and (1) check the air pressure of the tires (use a gauge for correct readings) and inflate to correct psi. (2) with a ruler, measure the distance of the mower deck to the ground in an X pattern and adjust as necessary. (3) raise the mower and inspect the blades to ensure there is no damage (bent, etc.)
YOu can get replacement lawn mower tires online by going on to either of the following websites www.ebay.com or www.amazon.com for low prices and a wide selection
A ride on a mower typically has four tires, two on the front and two on the back. It is similar to a four wheeler in the size, but it rides much higher than a four wheeler.