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Thank you to Toyo Tires for providing some of the graphics
on this page.
| The graphic at the right dissects
a tire sidewall quite nicely. Treadware, Traction and Temperature
ratings of less then 'A' probably are not desirable, and I doubt
any recent performance tire does not meet those specifications. |
What
the heck does all that junk mean on the side of my tires...
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| A demonstration of the 'plus-sizing'
concept, where the rim gets bigger and the tire sidewall gets
smaller, therefore the same tire diameter is maintained as closely
as possible. |
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Compute Backspace given rim width and offset. The A1 chassis can tolerate
between 4.5 and 5.1 inches of backspacing. Backspace is the amount of rim that's
behind, or inside of the mounting surface. Both positive and negative offsets are
valid, positive offset 'moves' the mounting surface towards the outside of the car,
negative offsets move it inward. A 0 offset puts the mounting surface right in the
middle of the rim. Often times, the offset in millimeters is stamped on the rim as the
'ET' measurement. Note that different offsets can work at the front and rear of the car, as
the rear track is slightly narrower and can tolerate higher ET, or slightly greater backspacing.
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