Factory Five Racing Mk3 Roadster Assembly Manual page 187

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 Motorsport Cobra R 17" wheels and 12" Cobra Brakes
17"x 9" and 17"x 10.5" FR style wheels.
1994-1998 rear end
Use two (4) 9" wide, 5.95" backspace wheels in the front and the rear. If you would like a wider tire than
this in the rear it is possible to use aftermarket 10.5" wide, 27mm offset wheels if the axles and caliper
brackets are changed so that the rear is the same width as the 87-93 rear ends. See the table above for
different width wheel backspacings.
1999-2003 rear end
Because of the width of this rear end, custom wheels are needed if 10" or wider wheels are wanted. Use
two (2) 9" wide, 5.95" backspace wheels in the front. See the table above for different width wheel
backspacings.
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