When shopping for new Miata wheels there are a couple critical issues to consider:
Weight....Add Lightness! The Mazda Miata is incredibly 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). I was surprised when I bought my first Miata in the early 90s when I ended up not enjoying the very first set of very nice wheels I picked because the ride quality became poor. Most Miata owners can feel a deterioration of ride quality from a gain of as little as 2 to 3 pounds per corner in unsprung weight. We therefore strongly recommend that you use only light weight wheels for your Miata like those we sell here. 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 lightness. For that reason, many of our listed weights here are slightly higher than the marketing weight listed on the wheel manufacturers' websites.
Offset and Size. Miata wheel offset causes a lot of confusion. Here is a simple explanation. If the rim is 6 inches wide, and the mounting surface of that rim (backside of the bolt holes), is 3 inches from either outside tire bead surface, that rim has a 0 offset. To the extent that a rim's mounting plane is offset from that zero position, that offset is measured in millimeters. For the 1990-2005 Mazda Miata the factory offsets are 45mm for 14 inch wheels and 40mm for factory 15s, 16s, and 17s. Lowering the offset number from 45 to 40 to 35 is moving the wheel further outboard. Stick to the range of 38-45mm for stock height to avoid concerns with fender lip rub. Those with lowered suspensions and 1.5 negative camber or better can pick a more aggressive offsets like 35-38mm and still clear factory fender lips easily with 195/50/15 or 205/50/15 tires. Offsets lower than 35mm will often require fender lip roll, particularly on the NA generation Miata (1990-1997). Those looking to have the wheels flush with the rolled fender lips will often pick even more aggressive 20mm to 30mm choices. Spec Miata racers are usually using 25mm offsets. We have numerous 15x9 choices for those racing with 225/45/15 and these wheels require changing stock suspension for more narrow coilovers (like our TEIN and Ohlins coilovers), in addition to fender lip rolling. Please contact us if you have any questions on appropriate offset for your intended use.
Mounting Tires. Note the Miata 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).
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. 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 Miatas here, helps keep them clean.
Shop our Miata 1990-2005 Wheels catalog by clicking below:
After reading many other positive reviews on both the GWR and Miata forums I finally decided to buy this product. My main concern for many months was whether or not I was up to the task of installing the header. But with the excellent instructions on Brian's forum as well as several Miata forum threads it turned out easier than I expected.
After receiving notice that the header would arrive on a Friday afternoon, I began the disassembly process. After about 3 hours I had the stock manifold out. Later that afternoon the new catted header arrived right on schedule. And it is a thing of beauty. I opted for the stainless version. Installation on Saturday morning took another 3 hours, although I could have shaved some time off of that but I was actually enjoying the process of double checking torque values and cleaning up my engine compartment. I already have the GWR catted midpipe, so that connection was a snap.
I put everything back together, reconnected my battery, and went for a drive. NO CODES! Nice throaty sound with my RSII muffler, and a significant boost in power and low/mid torque. Another happy camper here. I since have added a M-E tune and I feel I have realized all of the gains that Brian has achieved on his 2012 project Miata. I've put several hundred miles on my Miata since the install with zero problems. This is the car that Mazda should have built all along. Thanks Brian.
-- Ron P.
Hello Brian, the swaybar and endlinks came in today. I am very pleased with the packaging and it arrived on time. Also thank you for excellent customer service and correcting my order no-hassle. I will definitely be ordering from Good-Win Racing again.