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lmcchesney |
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Member ![]() ![]() Group: Members Posts: 488 Joined: 24-November 03 From: Ocala, Fl. Member No.: 1,381 Region Association: None ![]() |
I have not found a complete source of accurate information on this topic.
The 914 is listed as having a 108mm four bolt pattern. What measures 108mm? The offset of my empi's are about 100mm. Is this the true specs? I have read else where that offset is a incorrect term. My use of offset is the distance from the inner surface of the wheel to the edge of the wheel rim projected down to the center line. Is this correct? Wheels are measured as 15 x 6.5. How do you measure the with of the rim? Is it from outer (curb surface) to outer or within the bead to bead? If you were to place your ruler on the rims, from what point to what point would you measure? What bolt dia and length and thread patern are standard? Ebay has a set of bolts that are 2 3/8" or 60mm in length and 1 1/2 inch or 36mm thead length. This allows about 50mm engaged inside the rotor hubs. What length should the bolts be inside the rotor hubs to be safely secured? Thanks, L. MCChesney |
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Revolution Wheels |
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Newbie ![]() Group: Members Posts: 28 Joined: 2-April 04 From: Kingman, Arizona Member No.: 1,879 ![]() |
The other important specification to check is the Center Bore so the wheel will be hubcentric.
The 4x130 cars will need a 78.6 center bore while the 5x130 six cylinder and converted cars will need a 71.6 center bore. The backspace dimension will vary dependent on wheel width and offset. For example, a 7" wide wheel with a 35mm positive offset will have a backspace dimension of 135mm, while a 6" wheel with the same offset will have a backspace dimension of 121mm. The backspace dimension may vary slightly with different makes of wheels due to differences in rim flange thicknesses and design, but it usually not by very much. |
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