Back
in the good old days (pre-80's), just about all car
manufacturers used wheel studs and lug nuts as a
means of attaching wheels to the car's hubs. Many US
and just about all Japanese car makers still use
studs although the Europeans (Alfa, Audi, BMW,
Ferrari, Mercedes, Porsche 996/Boxster, Saab, VW
& Volvo) are fairly unanimous in their use of
wheel bolts.
Using
lug bolts avoids stud and wheel damage when mounting
the wheels onto the car. However, aligning the
wheel's bolt holes with the matching holes on the
hubcentric hub can be difficult, especially when
using wheel spacers or mounting today's larger sized
wheel and tire combinations. When the wheel slips off
the hubcentric hub ring as you try to align the
holes, it can damage the wheel or caliper finish, the
backing plate or injure the person doing the work as
their hands become covered with brake soot. Try
changing today's large diameter (17"- 20"
wheels with tires) without this tool and you'll see
what I mean.....its a lot easier to simply phone for
"roadside assistance".
Manufacturers
have recognized these problems to some degree and
have included factory tools, apparently as a casual
afterthought considering the quality of these
products, to help guide the wheel onto the hub. BMW
uses an arbor drift with a plastic tip (try holding
the arbor, the wheel and the lug bolt with only 2
hands), Audi offers a plastic threaded hanger (I've
got 2 with the threaded ends snapped off) and
Mercedes includes an aluminum threaded guide with
their sedans (a little weak in my opinion....Mercedes
must think so too as they don't include one with the
current M-class trucks).
The
Ultimate Garage wheel installation guide tools are
made from 300 Series stainless steel and include a
knurled ring to grip the hanger when installing or
removing the tool. If the tool becomes stuck, there's
an end slot for use of screwdriver. The tool has a
distinct thread stop to stabilize it in the hub when
installed.