Published by Rims & Tires
Compiled & checked by the site's publisher from manufacturer, NHTSA & USTMA data · Updated 2026-08-01
A compact donut spare (the small, narrow tire in most car trunks) is designed for emergencies only — typically 50 miles max at 50 mph max. A full-size matching spare has no such restriction. Here's what you need to know.
How far and how fast can you drive on a donut spare?
Most compact spares are rated T-type (Temporary) with a max speed of 50 mph and a recommended range of 50–70 miles. These are printed on the sidewall of the spare itself — look for "TEMPORARY USE ONLY" and the max speed rating.
The donut is narrower and smaller than your regular tires, which affects handling, braking distance, and ABS/traction control performance. It also puts uneven stress on the AWD/4WD drivetrain if left on too long.
Don't take a donut onto the highway at 70 mph, don't forget it's there, and don't leave it on for weeks. Get the flat repaired or replaced as soon as possible.
How long can you drive on a full-size spare?
Indefinitely, if it genuinely matches. A full-size spare with the same size, speed rating, and load rating as your regular tires can stay on the car — the U.S. Tire Manufacturers Association's rule for any replacement tire is that same size, load index, and speed rating designation. Many truck and SUV owners run a full-size spare mounted on a matching wheel for exactly this reason.
Full-size non-matching spares (different brand, tread depth, or size) should still be treated as temporary — especially on AWD vehicles where mismatched tread depths can stress the center differential.
West Georgia Local
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What should you do after a flat in West Georgia?
Install the spare and drive to the nearest tire shop — don't drive more than necessary on a donut. Most shops will repair a repairable flat (nail/screw in the tread with no sidewall damage) for $15–30.
If the tire is not repairable (sidewall damage, large hole, run-flat damage), you'll need a replacement. Having your tire size handy speeds the process.
West Georgia has tire shops across Carroll, Douglas, Paulding, Haralson & Heard counties. Most open by 7–8 AM and several offer 24-hour roadside service.
Frequently asked
Can I drive on the highway with a spare?
With a compact donut: no, or very briefly at well below highway speed. With a full-size matching spare: yes, normal highway driving is fine.
What PSI should a spare tire be?
Most compact spares are rated for 60 PSI — check the sidewall. Unlike regular tires, the spare is often ignored for months or years and loses pressure. Check it now before you need it.
Do I need to get an alignment after a flat?
Not from the flat itself, unless the wheel hit a curb or pothole hard enough to damage the suspension. If the car pulls after the flat is repaired, get an alignment check.
Is a plugged tire safe to keep, or should I replace it?
A proper patch-plug done from the inside, on a nail hole in the tread, is a permanent repair that plenty of drivers run for the rest of the tire's life. What's not safe is a sidewall puncture or a gash near the shoulder. When in doubt, have a shop inspect it from the inside before you trust it again.
How much does it cost to replace a spare or donut?
A replacement donut usually costs less than a full tire, and a shop can often track down a used one cheaper still. A full-size matching spare runs whatever one of your regular tires costs. Either way, grab your tire size off the door-jamb sticker before you start calling around.
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Last updated 2026-08-01. General guidance only — confirm specifics with a local shop for your exact vehicle.