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post #1 of 2 Old 03-24-2014, 01:41 PM Thread Starter Fanatic
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Biggest tire size on stock 20s

What's the biggest tire that can be put on stock 20x8 wheels without a lift on an '07 FX4?

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'07 CC/SB FX4
XDP Coolant Filter
Blue Spring Mod
High Idle
4" Turbo Back Exhaust
200* Mishimoto T-Stat
EGR Delete
Leveling Kit
Billstein 5100s
Pro Comp Dual Steering Stabilizer
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post #2 of 2 Old 03-26-2014, 01:27 PM Rookie
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Ive got 37x13.50r20s on a stock wheel on an 06 F250. Ive got a leveling kit in the front and blocks in the rear and i barely rub. Ive run two sets of this size and never had issues with wear or sidewall roll. Ive never felt unsafe doing it either. I believe since you have an Fx4 you can run 35x12.50's on a stock wheel. It may rub but trimming does wonders. I know with a leveling kit 35s do not rub at all.

2006 F250 King Ranch SRW CCSB
Powermax Turbo
4in Straight Pipe
Airaid CAC
SCT X3 from Innovative Diesel running Xtreme Street
3in Leveling kit w/Bilsteins and 37" Toyos
Edge Insight
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