Not sure of the largest, but I'm running a 275/50 DR in my stock fenders right, thats roughly a 26x10.5 slick. On very large bumps the outside fender lip will rub, since they aren't rolled back yet.
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1989 Mustang LX Notch
5.0L, T-5, 1969 351W heads, cut & welded stock plenum, F-303 cam, Mac 1 5/8 full length headers, Cat'd H-pipe, 3.73 gears, Underdrives, SSM lift bars, E-Fan, 3G Alt, Custom Chip, Autometer gauges, Weld Draglite wheels , M/T ET Street Radials
Best 1/4: 13.33@101.53MPH
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