Has anbody mounted GT5 wheels on a standard Pantera hub with standard (i.e. 1.2") studs? Will they work or do you have to replace the studs with longer ones?
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Quite a few owners have converted '71-74 Panteras to the GP 4 or GP 5 look, using 10-hole 10" & 12 or 13" wide factory wheels. Never heard of any stud length problems. If the wheel flange is the same thickness as the std Campy, there's no reason to use longer studs... unless for some reason the wheels you want are not factory and/or have thicker flanges, or you need spacers. Stock studs have large heads, and all the available replacements have smaller heads, so there may be some adaption required. With care, Porsche studs are longer & will fit in spite of being the next-larger metric thread (so none of your lug nuts will work).
lee yes!! you have to use LONGER STUDS
i did i street car to GR4 and had to get the longer studs, i got them from hall http://www.pantera.go.cc
i did i street car to GR4 and had to get the longer studs, i got them from hall http://www.pantera.go.cc
I believe there may be several types of GT-5 wheels out there as far as the bolt holes in the wheel. Some have straight holes and some may have tapered seats? I have been running a set of 10's and 13's Campys using stock wheel studs and aftermarket straight shoulder metric mag wheel lug nuts. The wheels I had (I think) came from the Kleinpeter racing stable and had straight 0.750" dia. holes in them. I could not find anybody that supplied the straight shouldered lug nots to match the stock Pantera threads to a 0.750 hole diameter. Its been a while since I did this, so I do not remeber all the specific details, but I believe these lug nuts had a diameter of 0.655" if I remember correctly. I sleeved the lug nuts with .049 wall x .750 dia. stainless steel tubing insets. You have to ream out the seam on the ID of the tubing insets or once you press the sleeves on the lug nuts, the diameter maybe a thousand or two larger than the hole diameters in the wheels which would make for a tight fit of the square shoulded "modified" wheel nut into the wheel lug nut hole. Even with lug nut washers, the thread engagement was more than with the stock wheel, wheel nut setup, so no problem with stock stud length with this arrangement.
SUMMIT RACING SUPPLY HAS 12.5MM X 1.5 PITCH LUG NUTS FOR MAG WHEELS, 3 TO 4 DIFFERENT LENGTHS. THATS WHERE I GOT MINE WHEN I WENT TO RACING MAGS. GOOD-LUCK, MARLIN.