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Unformatted text preview: Automotive Chasis Systems 5 th Ed. Chapter 21 Questions Name ___john barton _________________ 1. What are the TWO purposes tires serve? Shock obsorbtion, traction 2. Typical tread depth for new tires is? 1 1/32 3. What is the purpose of wear bars? So it is visible when tires are down to their legal limit. 4. What are sipes ? Lateral slits in the tread that help the tire grip the road. 5. What is a tires bead? It is steel wire coated with copper and rubber that is the lip of the tire that contacts the inside of the wheel and hols the tire on the wheel. 6. What are body plies ? The layers of material between the two beads and under the tread 7. What is a tire belt? Two or more layers of material on topof the body plies and under the tread tht help the tried stay attached and last long. 8. What does the dot mean that is put on a tire by a manufacture? To mark the spot of largest diameter. 9. Explain what a 50 series tire is (aspect ratio) Its aspect ratio is 50% 10. Define to following designations: LT, T, M+S, TR....
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This note was uploaded on 02/02/2012 for the course AUTOMOTIVE AUTO155 taught by Professor Spratling during the Spring '10 term at BYU - ID.
- Spring '10