- For widths not list here, following the centerline-to-mounting
face or mounting face-to-outside edge
dimension is preferable to using the backspacing specification.
Unfortunately, most wheels are sold by the backspacing
dimension, so the other dimensions must be calculated. (Tire Size
For machining reference, basic drawings of the front and rear Pin-drive hubs are here.
Note that the optional 4-piston Sierra/Wilwood/Coleman
brakes will not fit
in these wheels!
Halibrand has a similar wheel that may fit
the 4-piston calipers, but we haven't tried them.
Dimensional Comparison of 15" FIA and 427 Pin Drive
|Both the FIA (left) and 427 (right) are
shown. Note that the wheels on both cars
come very close to the bodywork. The 1/2" difference between
the wheel offsest will very likely make the wheel rub. At the
very least, it will look "wrong". ||
same problems occur in the rear.
17" Wheels: The backspacing is the same for
bolt-on and pin-drive designs except as noted.
The distance from mounting face and inner face
is critical for 4-piston caliper clearance.
wheels may be used with 275/40 and 315/35 tires.
Note! Bolt-on Wheels Only:
Add 0.3" to the backspacing when used with the ERA
wiring of the pin-drive-wheel wing nut shown here.|
important to note
that the under-car
exhaust cannot be used with wheels with
more than 3.88" backspacing.