Rim 1
All truck rims are made of single pieces of metal.
True or False
False 913
What is unique about the lugs on the left side of trucks?
They are left hand thread.
Why do most learning environments not replace wheel seals?
They are expensive. 962
What can the wide-base singles also be called?
High floatation, super single, wide-body, duplex, and jumbo wheels. 916
How often should the tire cage be used when inflating tires?
Every time. 918
What two types of disc wheels subdivision are there by the means used to mount them?
Stud piloted, Hub piloted. 913
How do you know if the lugs are left hand thread or not?
Have an "L" stamped on the end of it.
How many steps are there for installing wheel bearings?
7. Page 956
Radial tires are?
The body cords are placed perpendicularly across the tread from bead to bead. 919
Bias tires are?
The body ply cords lie in a diagonal direction from bead to bead. 918
What two general types of wheels are used?
Cast spoke wheels, disc wheels. 913
What is an advantage of cast spoke wheel?
You can change a tire without having to remove the whole assembly.
What is step number 5?
Final back off 956
What are the good things about wide-based tires?
Reduce overall wheel end weight, reduce tire rolling resistance, increase payload potential, spreads the axle permitting lower center of gravity and greater stability. 920
How many percent of rolling resistance does each axle divide into?
Steer axle 16%, Drive axle 44%, trailer axles 40%. 920
How many spokes does each design have?
Three, five, and six. 914
How many spoke designs are there?
Three. 914
What causes there to be pieces of tires on the road all the time?
Tire pressure is so low that it causes the tire to either explode or throw the retread off of the tire.
What are the three categories of highway truck tread designs are?
Rib, Lug, High-traction lugs. 919
What does the first number in tire size stand for?
The width of the tire.
What does the number after the letter “R” stand for in tire size?
The size of rim it fits
What is a disadvantage of the cast spoke wheel?
Harder to keep the tire balanced.
What are the advantages of using the same tread design on dual tires?
Tire life greatly increases when tires are properly matched in tread pattern, diameter and circumference. Improperly matched tires cause costly mechanical problems due to differential carrier failure resulting from constant differential action. 918
What does the second number stand for?
Aspect ratio. 922
What is one problem in getting drivers and service personnel to maintain that causes excessive wear on tires?
Air pressure. 923