how fast can you drive on a donut

The general recommended speed limit for driving on a donut spare tire is usually around 50 miles per hour (mph). This speed limit is critical for safety due to the donut tire's smaller size, reduced traction, and quicker heat buildup compared to a regular tire. Driving faster than 50 mph increases the risk of a blowout, which could cause loss of vehicle control. Additionally, donut tires are intended only for short distances, typically no more than 50 to 70 miles, and should be replaced with a regular tire as soon as possible. Weather, road, and traffic conditions also impact the safe speed and use of a donut tire, with caution advised in adverse conditions. Full-size spares, if present, can generally be driven at normal speeds like regular tires, but the flat tire should still be fixed promptly.