Good-Win Racing is the only wheel dealer actually owning, daily driving, and weekend racing a Fiat 124. We also stock THOUSANDS of wheels and have developed fitments that are exclusive to us. Thus, nobody is better prepared to get you setup with the right setup.
Mazda designed the chassis under the Fiat 124 so much of what we learned from owning and racing the 4th generation "ND" MX5 got us a head start with the Fiat. Just like the MX5, the Fiat 124 responds best to lightweight wheels like the ones we offer. Our favorite Fiat 124 street tire currently is the Continental ECS (ExtremeContactSport), for it's excellent mix of good grip, ride, and low noise, and good in dry or wet.
Stock tire sizes are 195/50/16 on 16x6.5 and 205/45/17 on 17x7, which means the stock tire diameters range from 23.6 to 24.3 inch. Within that range there are interesting upgrade sizes to consider. If potential rub of the plastic fender liner at full steering lock is going to concern you, then your max size is a 45mm offset 17x8 with 215/45/17. Nonetheless, we prefer 235/40 since potential rub is just at full steering lock and just on plastic fender liner and we don't care about that since full steering lock is for slow parking lot turns. Despite racing weekends on 17x9 wheels we don't daily drive wheels that wide for obvious reasons of ride quality and increased tramline behavior, etc. If you go 17x9 for weekend racing, YOU must check clearances to items like fender lip on the outside and brake lines to the inside, rubbing plastic fender liners with any tires of 225/45 or wider is considered normal. For track use and tire sizes of 225/45 or 235/40 we suggest our coilovers with starting heights of 13.25 front, 13.5 rear (measured center of wheel up to fender lip). Konig and Advanti wheels include center caps, but not valve stems or lugs or hubcentric rings. Most our Enkei wheels include center caps AND valve stems unless otherwise noted. We consistently recommend folks do suspension mods BEFORE the bigger wheel and tire package because bigger wheels and tires need additional roll resistance, and lowering springs and/or coilovers provide access to more negative camber that tips the top of the tires inward under the fender lips for easier fit.
See tabs below for more answers to the most common questions when shopping wheel options for the Fiat. All our Konig and Advanti wheels include center caps, but not valve stems or lugs or hubcentric rings. Most our Enkei wheels include center caps AND valve stems unless otherwise noted.
WEIGHT: ADD LIGHTNESS!
Like the Mazda MX5 it shares the chassis and suspension with, the Fiat 124 is very sensitive to what is called unsprung weight (which can best be understood as what hangs off the Miata suspension rather than what sits on it). Mazda designed the chassis under the Fiat 124 for LIGHT weight wheels. The MX5's BBS 17x7 wheels start at just 15 pounds, but Fiat went for style and stock Abarth wheels are ridiculously heavy at 22 pounds each for just 17x7. The good news is Fiat 124 owners have the opportunity with a change to lighter wheels to improve ride quality and make the Fiat 214 handle even better.
Unlike other vendors who rely on overly optimistic wheel weights as listed by the wheel manufacturers, we weigh each wheel that we sell to verify the weight that we list!
Mounting Tires
Note the Fiat is VERY sensitive to wheel balance issues and many shops do not have equipment that can balance the combination precise enough. Therefore, we suggest finding a shop near you with a Hunter Road Force Balancer (Just google Hunter GSP9700 and enter your zip code in their locator). Torque lugs to 85 ft/lbs and check that torque again every week for first month of owning new wheels or lugs. We ended tire service, the Fiat is just uniquely too sensitive to wheel balance issues and we came to realize Customers are best served by getting tires local with a lifetime mount and balance deal that most shops either include or have as an option these days. We can send perfectly balanced sets, 'road force balanced' which is what the Fiat needs, but over time with wear you need another re-balance often with the Fiat and sometimes just a little rock bouncing up from the road knocks off the balance weight and you need that re-balance yet again to avoid the dreaded Fiat 'shimmy' at 60mph. If the Fiat was not a convertible it would be a lot stiffer, a lot less prone to this issue, but we all love it because it's a convertible so consider getting tires local and re-balanced as needed yearly as worth it for the fun factor. Note our site will let you ship wheels direct to your top local tire dealer if you like.
DO YOU NEED HUBCENTRIC RINGS?
Hubcentric rings ensure that the wheel is centered on the hub, even before the lug nuts are tightened down. It's a nice bit of low-cost piece of mind knowing that you can't end up with a wheel off-center due to incorrect lug nut tightening. However, hubcentric rings are NOT mandatory. The lug nuts seats are conical for a reason; as long as you tighten the lugs correctly (done by hand and in a criss-cross pattern) then the wheels self-center as the lugs are tightened. However, some shops don't take the time to correctly tighten lugs, they just zap them on with an impact gun and the Miata is too sensitive to imbalances for that to be good enough. So, you don't have to use them, but they won't hurt and they're cheap insurance. As a rule of thumb, the racers know they don't want hubcentric rings because they know what they're doing and the rings just become an extra thing to worry about... but if you're asking if you should get hubcentric rings, then the answer is probably "yes" for you. Note that all our hubcentric rings are sold as sets of four, so order just quantity one for a set of wheels.
WHEEL CARE
Most modern wheels are clear coated just like the paint on your car. Therefore, do NOT use anything on your wheels that you would not use on your Miata's paint. Only clear coat safe products should be used on wheels. We like to put a coat of fresh car wax on new wheels before we put them on our cars here, helps keep them clean.
BRAKE DUST: Brake dust can be corrosive. Some brands and compounds in particular are known for eating up the finish on wheels, especially if the dust gets sprayed on the wheels when hot at the track and then left there for 24 hours or more, particularly with some overnight dew/moisture or lots of UV gets added to the mix. Some brands' compounds are less corrosive than others, but as a rule of thumb it is always best to keep your wheels clean. Nothing more than normal soap and water is needed. Before leaving the track we'll seek out a garden hose in the pits to fully rinse the dust off before the drive home.
TPMS SENSORS
TPMS operates off ABS system with the ND, that means NO sensors in the wheels to worry about for most Fiat 124 (though oddly the Abarth version alone has sensors in the wheels that will need to be transferred to new wheels or replaced).
15" Wheels?
most 15 inch wheels do NOT clear the big brake calipers, even on cars without the Brembo upgrade, and the effective offset to make 15 inch clear the brakes will usually put the tire outside the fender lip (and the fender arch on ND/Fiat 124 is bigger than prior Miatas, doesn't look right with 15 inch anyway). Thus, we do NOT suggest 15 inch choices on the Fiat 124.
16" WHEELS
195/50/16 tire size fits within the fenders on wheels down to about 35mm offset. For customers seeking more performance in 16 inch sizes consider 205/50/16 up through 225/45 on 16x7 and 16x8 wheels with higher offset. See product description for 16x8 Enkei RPF1 for pictures of this popular choice on our own Fiat 124.
17" WHEELS
With stock size 205/45/17 tires you can run offsets as low as 40mm and still fit in factory fenders with 1 degree negative camber or better, we have run 38mm with more camber. An easy upgrade in 17 inch is 215/45/17 and that fits with our wheel choices that are 42mm to 50mm offsets.
MAX TIRE SIZE
Maximum tire size that will typically get used in stock fenders is 235/40/17 using our 45mm offset 17x8 or 17x9, as long as you have about 1.5 degrees of negative camber or more. If the car is lowered and/or raced, this size will typically rub the plastic fender liners inside the wheel well at full steering lock and/or over big bumps/dips in turns depending on amount of lowering and amount of lowering and amount of negative camber (same story with taller 225/45/17). This is all even more true for 245/40/17, which can be used by SCCA STR competitors with a fender roll. Picture above is our own Fiat 124 with our 17x8 Bronze 6UL wheels and 245/40 tires, and lowered with KONI SPORT shocks and our Race Spec Springs.
LUG TORQUE
Torque lugs to 85 ft/lbs and check that torque again every week for first month of owning new wheels or lugs.
