Square Body K5 Blazer biggest tire size: stock and lifted
The biggest tire owners run on a Chevrolet K5 Blazer (1973–1991) at every lift height, with the trimming it takes, the wheel specs you need and the lift kits that get you there.
About 32 inches. Hogback Fabrication says on CK5 that a stock K5 fits 32s without trimming and 33s with minor trimming. Other owners report 33s rubbing the inner fender at full lock and full bump, but fine on the road. On 16-inch wheels, 285/75R16s are commonly said not to rub. Wheel width and backspacing matter: one member suggests 15x8 wheels at about 3.5 inches of backspacing as the easy fit for 33x12.50s.
Biggest Square Body K5 Blazer tire at every lift
| LIFT | BIGGEST TIRE | WHAT IT TAKES |
|---|---|---|
| Stock | 32 in (33 in with minor trimming) | Hogback Fabrication on CK5: a stock K5 fits 32s without trimming and 33s with minor trimming. Other owners report 33s touching the inner fender at full lock and full bump. On 16-in wheels, 285/75R16 is reported not to rub. For 33x12.50s, one member suggests 15x8 wheels at about 3.5 in backspacing. |
| 3 in | 33x12.50R15 | Offroad Design's 1988 Suburban (same chassis) ran 33x12.50R15s on 15x8 steel wheels with 3 in of lift at the front and 4 in at the rear, plus a dropped pitman arm and 4.5-in bump stops. |
| 4 in | 33 in (35 in with trimming) | CK5 members: 33s clear without rubbing on a 4-in lift, while 35s rub and need some trimming. Plenty of owners run 35s on 4 in with modest trimming. |
Square Body K5 Blazer wheel and tire specs
| Bolt pattern | 6x139.7 (6x5.5") on half-ton K5s; 8-lug on one-ton axle swaps |
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Lift kits, wheels and tires for the Square Body K5 Blazer
New springs fix decades of sag and clear 33s. A 3–4 inch lift with a dropped pitman arm is the usual setup.
Fitment comes from owners and specialists; wheel width, offset, trimming and bump stops change what fits. Check clearance at full lock and full flex before you buy. Some links are affiliate links.