What are the guidelines for patching a tire?

For a safe repair, the puncture must be 1/2 inch away or more from the edge of the tire tread where the internal steel belt begins. Any puncture less than 1/2 inch from the start of the internal steel belt on the shoulder or sidewall of the tire cannot be repaired (highlighted in red).

What are RMA guidelines?

Among several criteria the RMA recommends for performing a proper repair are: Repairs are limited to the tread area only. (No sidewall repairs.) Puncture injury cannot be greater than 1/4 inch (6mm) in diameter.

What is the minimum number of times a technician should drill the injury channel from the inside and the outside?

Beginning from the inside, ream the punc- ture channel a minimum of three times—repeat from the outside. Use a probe to check for any splits in the radial plies surrounding the injury.

What is the first tire repair procedure?

Step-by-Step Tire Puncture Repair Procedures

1. Consult information about repairability of tires.
2. Locate the injury and circle with a tire crayon.
3. Remove the foreign puncturing object and probe the injury with an awl to determine the angle of penetration.
4. Clean the area around the injury with cleaner fluid and a scraper.

How many times can a tire be patched?

On average, tire experts predict that a proper plug and patch can last from seven to ten years. Although tire patches can last a long time, a tire should never be patched more than once. It can negatively affect the speed rating and potentially cause blowouts.

Can a tire be patched on the sidewall?

A damaged tire can only be repaired if: Tire Repair Ann Arbor. The puncture is within the tread area* of the tire – sidewall punctures are NOT repairable. The tire puncture is ¼ inch in diameter or less.

When can tires not be repaired?

Puncture repairs are limited to the center of the tread area. If there are punctures or damage in the shoulder or sidewall of the tire, it is not repairable.

What is RMA A2?

Drawing designation “A2” tolerances indicate a precision molded rubber product. Molds must be precision machined and kept in good repair. While measurement methods may be simpler than with drawing designation “A1” high precision for molded rubber products, careful inspection will usually be required.

How big of a hole can be patched in a tire?

1/4 inch
Size of Puncture The maximum repairable injury size for passenger and light truck tires through load range E is 1/4 inch, or 6mm in diameter. If the puncture in your tire is larger than the allowable repair size, the tire must be taken out of service.

How big of a hole can a tire shop patch?

0.25 inches
Depending on the size of the puncture, the extent of the damage, and the tread of your tire, you may not be able to repair the tire with a plug. The size of the hole must be no larger than 0.25 inches and must be located on the tread of your tire.

What speed rating is R?

106 mph 170 km/h
Tire Speed Rating Chart

Can a patched tire blowout?

It’s completely different for the flat part of the tread, which basically doesn’t flex. I don’t think there is any blowout risk. The risk is that the patch comes lose and you lose air either slowly, or very slowly.