You should replace your vehicles tires approximately every 60,000 miles. Or when the tread on the tire is close to all gone.
As often as they require replacement. If the trailer or drive tires get to 2/32nds, replace them. Steers have to be at least 4/32nds.
Bicycle tires should be replaced every 1,000 to 2,000 miles, or if you notice signs of wear such as cracks, bulges, or worn tread.
In the average truck that does not haul large loads the tires should be replaced every 40 thousand miles. This is the best way to ensure that your tires are giving you the best gas mileage.
It depends on how old your tires are and how warn they are. The front tires will wear out first, so if they replace your tires regularly then you can get away with only replacing the front two. If you rotate your tires when you change your oil or don't replace your tires often enough then you will probably want to replace all four at the same time.
As long as all 4 match, the height difference between 65 and 70 should not cause a problem on most vehicles.
not too often unless they dont work
Bike tires should be replaced every 1,000 to 2,000 miles or when the tread wears down to ensure optimal performance and safety.
When your tires have 2/32" tread depth left you need to replace them.
P215/70R15 are alot tires. They will probably rub on most vehicles that call for P215/60R15. Most tire dealers should have the specs on your particular vehicle.
The 185-60-14 tires are general tires. They can fit most vehicles and are all season tires.
On average you should rotate your tires every 6000 mile or 6 months.
To determine the total number of tires needed for a fleet of 622 vehicles, you would multiply the number of vehicles by the number of tires each vehicle requires. Assuming each vehicle has 4 tires, the calculation would be 622 vehicles x 4 tires per vehicle 2,488 tires needed for the fleet.