Wheel Backspacing Measurement Tool
This tool was designed and developed by Castle Works Motorsports. It is used to determine proper backspacing when ordering custom wheels.
It is adjustable to fit 15" - 20" diameter tires and select-able wheel widths from 7"-12"
This tool comes standard with one bolt pattern plate of your choice. Additional bolt pattern plates are available as an accessory.
Standard Bolt patterns:
5 Lug Wheel Plate:
5x4.75"
5x4.5"
5x5"
5x112mm
6 Lug Wheel Plate:
6x5.5" (139.7mm)
6x4.5"
6x135mm
8 Lug Wheel Plate:
8x170mm
8x180mm
8x6.5"
Additional bolt patterns available on request.
Tool comes complete with all hardware, instructions and is ready to use.
Rigid case with foam inserts, sold separately,is a perfect way to protect the tool during transport. Case is waterproof and very rugged.
Wheel Fitment Tool
Tire Fitment Tool
Wheel Backspacing Tool