Chris' Automotive FAQ: Tire sizes for the All-Trac

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My Automotive FAQ - Tire sizes for the 1990-1993 Celica All-Trac and 2000 Celica GT-S.


Tire Aspect Ratio			40			45			50			55
Wheel Diameter (in)			15	16	17	15	16	17	15	16	17	15	16	17
Tire Section Width	205	( 8.1")	21.46	22.46	23.46	22.26	23.26	24.26	23.07	24.07	25.07	23.88	24.88	24.88
	215	( 8.5")	21.77	22.77	23.77	22.62	23.62	24.62	23.46	24.46	25.46	24.31	25.31	25.31
	225	( 8.9")	22.09	23.09	24.09	22.97	23.97	24.97	23.86	24.86	25.86	24.74	25.74	25.74
	235	( 9.3")	22.40	23.40	24.40	23.33	24.33	25.33	24.25	25.25	26.25	25.18	26.18	26.18
	245	( 9.6")	22.72	23.72	24.72	23.68	24.68	25.68	24.65	25.65	26.65	25.61	26.61	26.61
	255	( 10.0")	23.03	24.03	25.03	24.04	25.04	26.04	25.04	26.04	27.04	26.04	27.04	27.04

The key to selecting tires is to choose a tire that has a diameter as close as possible to that of the original size tire, which is 215/50-15 and 205/50-16 for the All-Trac and GT-S, respectively. My suggestions are highlighted above.

Generally speaking, you should remember a few critical points when selecting a tire:

1. Larger tires have the same effect as taller gearing, and thus result in slightly slower acceleration.
2. Smaller tires have the same effect as shorter gearing, and thus result in a slightly better acceleration.
3. Larger tires on taller 16" or 17" wheels will provide more protection against bent wheels.
4. Shorter tires on taller 16" or 17" wheels will likely provide your tire and wheel dealer with a continual revenue stream as a result of your bent wheels. Good luck! :-)
5. Larger tires will fill the wheel well and look good, but they may also rub against the chassis.

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