Last Updated: 01/20/98
Stock GS-R 15x6 wheels weigh a very respectable 15 lbs. To see a noticeable
improvement I would recommend getting wheels that weigh at least 4 lbs less. For
autocrossing in the street prepared category, we want to get the lightest wheels possible and the smallest
diameter possible that will fit. By getting a smaller diameter wheel, you are
effectively raising your drive ratio, hence better acceleration and you'll be
able to stay in the upper revs better. You all know how important it is to stay
in the upper revs in an Integra right? In addition to the better gearing, the
lighter rotating mass also allows you to accelerate faster and stop faster.
For reference, I weighed the stock tire/wheel and they weighed in at 36
pounds ('94 Integra GS-R, 195/55-15 Michelin XGTV4 and six-spoke alloy wheels).
This is a case in point of why you shouldn't go to 17" wheels if you want
performance. Even though the wheel you're getting is going to be lighter (per
unit volume) than the original alloy wheel, the bigger tire
is going to weigh much more. In terms of
acceleration, it's not feelable because the tire is further away from the COR
and is more important weight wise than the wheel.
Will Larger Wheel Widths Fit?
Here are the dimensions of your brake hardware that you have to consider when
selecting a custom made wheel to fit your car. The diagram shows the dimensions
for a '94 GS-R's front brakes.
Notice how our brake calipers go beyond the hub surface. Also consider the
suspension arm which will limit the width of your wheel/tire combination. The
correct offset should be considered here.
From: Shawn Church
After mucking around the underside of my car, I
took some measurements to determine clearance for wheels and tires at the rear
(where clearance is tight on the leading suspension arm). In short, the results
say that you must be very careful when going to aftermarket wheels. With my
205/55 tires and the stock 15x6 wheels, there was very little clearance between
the leading arm and the tire. A 215/50 should fit, but I am very concerned about
how close a 7" wide wheel with the stock offset will come to rubbing. Based upon
the measurements, there should be enough room, but it will be close. Anything
wider than 7" with the stock offset will definitely not fit. I now
understand why many wheel sellers (Tire Rack for example) recommend 35mm offsets
for our cars. This will provide an additional 10 mm of clearance which should be
enough to go to at least 7.5" wheels. Of course, it also widens the track by 20
mm total (usually good) and will put a little more stress on the wheel bearings.
For those of you thinking about getting 8" or wider wheels for racing, be
sure to get spacers or have the wheels made with a large (smaller number) enough
offset to avoid rubbing the front/rear suspension components. If you get spacers, you'll probably need longer wheel studs too.
Race Wheels and Manufacturers
Paul Spruell Inc
Panasport makes two types of wheels:
- 38 mm offset
- 10.5 lbs
- $193 each
- single piece construction
- not recommended for street use; thinner aluminum used to save weight; not
designed to hit potholes
- 38mm offset
- 14 lbs
- $150 each
- single piece construction
- okay for street use, stronger than the Ultra-lites.
- they look just like the Panasports
- probably the same specs
- available in 13x7 and 13x8 unlike the Panasports
Keizer Aluminum Wheel
14" wheels not available
13" wheels weighs about 8 lbs
12 5/8 inside width of their 13x8 wheels
$161 per wheel (13x8)
$5 each for a steel plate to prevent the steel lug nuts from damaging the
$15 per set for precision boring of the center hub
outer rim half to make a 13x9 - $60
3 piece construction
Can be custom made
from the factory, the Keizer wheels have problems holding air in the tires;
a couple of applications of silicone around the mating surfaces seems to solve
Comments: Should probably fit with 0.25 inch spacer and a 35 mm offset.
(515) 276-2587 (fax)
- 14" wheels not available
- Will not fit without a 0.25 inch spacer.
- 3 piece contruction
- Can be totally custom made, ex. you can ask them to make the wheels a
little bit stronger for part-time street use (weighs more though)
- Costs about 25% more than the Keizers
- very helpful people
- Comments: They have available another set of wheels which can be custom
made and would not require the use of spacers to fit on the Integra. The
wheels are made on a contract basis by Monocoque.
I bought a set
of Keizers for my CRX and had problems. They didn't hold air until after two
applications of sealant and I had to build .300" spacers to get them to clear
the brake calipers in front. Fortunatly, I had access to a machine shop at the
time, but finding longer lug studs and replacing them was a real pain. I believe
Duralights custom build their center sections to fit the car.
Both the Duralights and Keizers are three piece wheels, however the design of
the Duralights is better. The Duralights are assembled with the center section
sandwiched between the rim halves. The Keizers have both rim halves clamped to
the center section. Crude ASCII cros section below:
RIM RIM RIM RIM
| | | |
The Keizer design puts twice as much shear force on the bolts - in the
treaded area. The fatigue life of the bolts is more then halved. Next time, I'll
pay extra and wait for the Duralights.
Monocoque Wheel Co
- will fit without spacer
- 3 piece construction
- around $240 each for the 13x7
- reputed to be the lightest wheels available
Racing Wheel Services
(215) 945-8949 (fax)
- one piece construction
- 12 lbs.
- strong enough for street
- $131 per wheel