Maintenance; Wheels - Factory Five Racing MK4 ROADSTER Assembly Manual

Maintenance

Check the items on the race car check sheet in the Appendix on a yearly basis or before track days depending on
how hard the car is driven.

Wheels


Only 7"-9" wheels are recommended for the front. If using a wheel wider than 7", FFR front lower
control arms are needed to prevent the wheels rubbing the control arms.
Below is a chart indicating the REAR wheel sizes and backspacing that are possible using the Mark IV kit:
*Can be used up to 10.50" wide wheel
OEM 17"x 8" FRONT/REAR
AFTERMARKET 17"x 9"
AFTERMARKET 17"x 10.5"
The max rim width for a 3-link is a 10.50"
If you have any questions please call the Tech department at 508-291-3443.
If a modern look is what you're after, you may want to try the 17" Cobra-R or FR style wheels. If using the
standard width 1987-93 rear, it is possible to use aftermarket 10.5" wide, 27mm offset wheels. If using a rear
end that has been converted to 5-lug using the "Cobra" brake kit use two (4) 5.95" backspace wheels.
Left: FFR car using late model 17" Cobra-R rims. Right: Ford Racing Cobra R 17" wheels and 12" Cobra
Brakes.
Max Tire
width 87-93
(Width/2)+1
275mm*
315mm (Width/2)+1.625 (Width/2)+2.5625 (Width/2)+3.25
99-04
5.72
-
-
www.factoryfive.com
Rear Wheel
Backspace
Equations
94-98
(Width/2)+2
94-98 87-93
MAX TIRE WIDTH 245/45 R17
5.72 5.72
MAX TIRE WIDTH 275/40 R17
6.00 6.00
MAX TIRE WIDTH 315/35 R17
- 6.80
499
508-291-3443
99-04
(Width/2)+2.75