These are smaller and lighter than regular tires. They are designed only to get you to a repair shop.
When selecting a spare, you must ensure it matches your vehicle's specific requirements:
If your car lacks a spare, you may need to purchase a mounting kit, jack, and lug wrench separately. 3. Spare Tires vs. Inflation Kits
Any replacement tire should be no more than 3% taller or shorter than your original tires to avoid damaging the drivetrain or affecting speedometer accuracy.
Check your spare's air pressure at every oil change, as they lose pressure over time even when not in use.
Most temporary spares are designed for no more than 50 miles of travel at a maximum speed of 50 mph .