Question:
Tire Problems:
• Too much or little air pressure.
• Bad wear. You need at least 4/32 inch tread depth in every major groove on front tires. You need 2/32 inch on other tires. No fabric should show through the tread or sidewall.
• Cuts or other damage.
• Tread separation.
• Dual tires that come in contact with each other or parts of the vehicle.
• Mismatched sizes.
• Radial and bias-ply tires used together.
• Cut or cracked valve stems.
• Regrooved, recapped, or retreaded tires on the front wheels of a bus. These are prohibited.
[California Commercial Driver Handbook]
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