WHEELS AND WHEEL FIT­MENT YOUR QUES­TIONS AN­SWERED More of your es­sen­tial ques­tions an­swered…

Performance Vauxhall - - VAUX TECH - WORDS Midge

We’re of­ten asked tech­ni­cal stuff via the medium of email, and Face­book about wheels and fitt­ments. Many of you will al­ready know al this stuff, but there are a lot of mis­con­cep­tions and down­right con­fu­sion over the is­sue. So we’ve grabbed a few min­utes with Mark Ewing­ton, the

PER­FOR­MANCE VAUX­HALL boss at Cades Wheels to an­swer all your ques­tions about wheels and wheel fit­ment. Well un­like most peo­ple imag­ine, it doesn’t come out of thin air, it’s ac­tu­ally pretty in­volved. Ev­ery wheel com­pany is dif­fer­ent in their ap­proach. We like to look at mar­ket trends in terms of style and siz­ing and then sketch some free­hand ideas. When we get one we like it has to be pro­fes­sion­ally ren­dered and drawn in 3D for the fac­tory. In the case of cast wheels, like stan­dard wheels and the vast ma­jor­ity of af­ter­mar­ket wheels, only then can we start making pro­to­types, moulds and fi­nal ver­sions. It’s not a cheap process and that’s why most wheels come in a lim­ited num­ber of sizes – you need a whole new mould for ev­ery one. Coilovers have slim­mer springs and cups than stan­dard sus­pen­sion so it’s prob­a­bly be­cause you need the clear­ance in­side the arches for the ex­tra girth. Then again it could be that off­set of the wheels is a lit­tle too high. Off­set is one of the most im­por­tant fac­tors in get­ting your fit­ment spot on, it’s ba­si­cally how far your wheels sit in the arches. Low off­set wheels that are too far in could foul on the sus­pen­sion or steer­ing com­po­nents, high off­set

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