914 wheels

[vrauba]

I suppose this info has been posted somewhere on the site, but I can't seem to find it. What is the bolt pattern on a 1973 914 4 bolt wheel and what is the length of the lug bolts (threaded area) and tread pitch? If I remember correctly, the way to measure bolt pattern spacing is to measure the diagonal distance between two opposite lug hole (centers), but if I do that, I get 4X130mm but that doesn't sound right...I think 4X100 or 4X112 are more the industry norms, but then again, I know how Porsche always tries to do things differently so that they'd be unique and thus could charge a premium. Also, if I wanted to widen the tires/rims are fender flares absolutely necessary, or could I just change the offset to accommodate the additional width? I'm thinking of trying to go from 15X5.5 to 17X7. Thanks.

[bryanc806]

4x130 is correct. Only two mass produced cars use this pattern: the 914-4 and the Volkswagen bug.

The Bug has a different offset though.

In general, going to larger wheels means changing to the Porsche 5 bolt patern (5x130). This can be done on the rear hubs by drilling and inserting studs. The fronts can be drilled, but the better option is to switch to a 911 front suspension.