Front Size: 8-9.5
Offset: 50-65 mm
Backspace Equation (inch): (width/2)+2.5
Tire Size, 245/45/17. 245/40/18

Rear Size (275-295): 9-10.5
Offset: 40 mm
Backspace Equation (inch): (width/2)+2
Tire Sizes: 275/40/18, 285/40/17, 295/35/18, 295/30/19

Wide Rear Size (305): 11-11.5
Offset: 46 mm
Backspace Equation (inch): (width/2)+2.25
Tire Sizes: 305/30/19

Extra Wide Rear Size (335)” 12-13
Offset: 52 mm
Backspace Equation (inch): (width/2)+2.25
Tire Sizes: 335/35/17, 335/30/18

Notes:
1. Wheel width is the advertised width measured at the tire bead
2. Factory Rear wheels use spacers provided with 275 tires for best fit
3. Max. recommended tire diameter is 25.9” (from 335/30/18) – fitment of larger sizes is unknown and not recommended.

GTM Alignment Specifications

Front:
Toe In (inches): 1/8
Camber (deg): -0.25
Caster (deg): 2.5

Rear:
Toe In (inches): 3/16
Camber (deg): -0.5
Caster (deg): N/A