Fitment knowledge · bronco-1g
1966–1977 · 3 documented findings, each backed by real builds and sources.
31x10.50R15 on a stock, uncut early Bronco fits with light rub at full lock and compression — the classic first upsize.
Heads up: Light rub at full lock and full compression, rear included; 30x9.50R15 is the no-drama stock size, and 2-3" of lift clears 31s reliably
5 documented builds · confidence 70%
33s on an early Bronco are a cut-fender proposition — uncut trucks should stay at 31" and under.
Heads up: Uncut fenders realistically cap out around 31"; 33s want cut-and-turned fenders with flares and 15x8 wheels around 3.25-3.75" backspacing
4 documented builds · confidence 65%
Cut fenders plus ~2.5" of lift is the documented recipe for 33s on an early Bronco.
Heads up: Cut-and-turn with flares, 15x8 wheels around 3.5" backspacing; watch rear compression rub
4 documented builds · confidence 65%
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