Based on the search results, tire shaving is a process of removing some of the tread from a tire to make it rounder and better balanced. It is commonly done on bias-ply tires for traditional hot rods or race cars. Here are some details, positives, negatives, ingredients, or materials related to tire shaving:

Details:

• Tire shaving is also known as truing.
• Few bias-ply tires are perfectly round or well-balanced, and tire shaving can help improve their performance.
• Tire shaving is not commonly done on modern tires, which must be round.

Positives:

• Tire shaving can improve the performance of bias-ply tires on traditional hot rods or race cars.

Negatives:

• Tire shaving can be expensive.
• Tire shaving can void the manufacturers tread wear warranty.
• Tire shaving can decrease the life of used tires.

Ingredients or materials:

• Tire shaving requires specialized equipment, such as an Amermac shaver.

Overall, tire shaving is a process that can improve the performance of bias-ply tires on traditional hot rods or race cars, but it can be expensive and void the manufacturers tread wear warranty. It is not commonly done on modern tires.