Tires Flashcards
On a tire you see this:
LT245/75 R16
What does 245 refer to?
Tires width in mm
What is Tire Aspect Ratio?
Sidewall height is a percentage of the tire width
On a tire you see this:
LT245/75 R16
What is the aspect ratio?
75
Sidewall height is 75% of the tire width aspect ratio of this tire is:
245mm X 75% = 184mm tall sidewall
On a tire you see this:
LT245/75 R16
What does R16 refer to?
Wheel diameter in inches
What does DOT on a tire mean?
Date of Manufacture
DOT stands for The Department of Transportation
You see a DOT of 3920, how do you read this?
39th Week of 2020
True or False:
Tires can go anywhere on my car in whatever orientation I please! I could do it with my eyes closed!
False! Always check the proper rotation direction of your given tire as tread pattern may be directional
How often should tires be rotated?
Every 10,000km
Should you include your spare tire in the rotation?
Yes! If full size/matches set
What is the minimum legal limit for tread depth?
2/32” or 1.6mm
Over inflated or under inflated tires can cause what issues?
Under inflated tires: can sag and cause excessive wear on the edges of the tread
Overinflated: can puff out and cause excessive wear in the middle of tread
Can a leak or injury on a tire be replaced if on the sidewall?
No! Tire must be replaced
Holes less than __mm or __” can be plugged
Holes less than 6mm or 1/4” can be plugged
Can holes be repaired if bigger than 6mm or 1/4”?
Yes! A patch/plug combo can be used from the inside wall of the tire
True or False:
Wheel imbalance can cause premature wear on tires, suspension and steering
True
