The 1990 Jeep Wrangler tire size depends on trim: the Base, 2.5 E takes P205/75R15; the Base, 4.2 T, Automatic takes P205/75R15; the Base, 4.2 T, Standard takes P205/75R15; the Islander, 2.5 E takes P215/75R15; the Islander, 4.2 T, Automatic takes P215/75R15; the Islander, 4.2 T, Standard takes P215/75R15; the Laredo, Standard takes P215/75R15; the Sahara, 4.2 T, Automatic takes P215/75R15; the Laredo, Automatic takes P215/75R15; the Sahara, 2.5 E takes P215/75R15; the Sahara, 4.2 T, Standard takes P215/75R15, per the factory service manual.
Where to Buy & Install Tires for Your 1990 Jeep Wrangler
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Tire Rack
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