Now a commonly used fitment for the FD RX-7 that pushes the limits, and might require rolling the fenders a little, are the 18×10+50 wheels wrapped in 285/30-18.
Titan 7 offers their T-R10 wheel for the RX-7 in this size. This wider size sticks inward 5mm more than the 17×9.5+51 and extends another 7mm. While this setup is commonly-used, since this isn’t my car, I chose to be a little more conservative with a known width and offset package that will not having rubbing issues; a requirement from the owner. Plus, the EC Force tire is not available in this size and we wanted to try this tire, which is another reason we went with the 17” wheels.
For all of the FC guys out there, Titan 7’s Techna Bronze T-S5 were featured on Rob Dahm’s personal anniversary FC RX-7 in a 17×8 +37 front, and 17×9.5+57 rear using a 18mm rear wheel spacer for an effective rear offset of 17×9.5+29. He’s running a 225/40-17 and 255/40-17 tire fitment on these wheels.
After installing the wheels, we had the experts at FSE-Irvine set our car up with a performance street alignment intended for some track use. The front camber was set at -2.4* while the rear was set at -1.5*.
The wheels really ‘pop’ visually out in the sunlight. Especially the contrast of the exposed aluminum features.
It’s always fun to look at the size comparison of 90’s sportscars to modern sports cars. This new MKV Supra is 51” tall, 73” wide, and 172” long. That’s 2.6” taller, 3.7” wider, and 3.3” longer than the FD RX-7.
9 comments
Great article. I can’t wait for the track test. I am also looking at some Titan 7 made wheels for my 08 Miata. Evasive Motorsports has a custom line made for them by Titan. 17×10 +47 EVS Tuning 52R, which should need just a 3-5mm spacer to fit the NC properly. They are meant for S2000’s, but luckily that offset is very close to what the NC’s need, too.
Where are the Titan’s made?
Minor correction: the reinforced wheel is on the left, unreinforced on the right.
Valve stems are placed where they are most aesthetic on modern aluminum wheels, not on the heavy spot of the wheel. It’s nice to be consistent about aligning the dot on the tire with the valve stem but it really means nothing.
That’s all well and good but the author didn’t even mention the dot.
I think he was just saying that on pro race cars, they make a mark on the tire at the valve stem to keep an eye on slip.
Correct, it’s easy to make a small line with a paint pen to mark the valve stem position to monitor tire slippage on the wheel.
Why didn’t you use 265/35 tires? That would be much closer to stock diameter and would not be stretched over the 9.5″ wheel. Were you concerned about rubbing on the front fender? With a +51 offset, I would think a 265 would have plenty of clearance.
The Titan 7 T-D6 wheel is only available for the S2000/FD RX-7 (which have the same fitment) in 17×9.5 5×114.3 +51 square. This fitment makes the 255/40-17 an ideal tire for that wheel due to its 25.0″ OD, which is right in between the stock FD’s 24.9″ 225/50-16 front tire and 25.3″ 235/45-17 rear tire. I am assuming you are referring to a 265/35-18 tire size with it’s 25.3″ OD that matches the stock FD’s rear tire. For an 18″ wheel, the Titan 7 T-R10 18×10.5 5×114.3 +51 would be more preferable with a 285/30-18 tire.
Thanks for the reply. Yes I was referring to an 18″ wheel. You are correct, a 255/40-17 is closer to stock diameter than a 265/35-17.
I don’t love the T-R10 style as much, and 10.5″ even at +51 would need some camber, stretch or fender work to fit the front.
If I go to Titan 7’s site, they don’t let you view the wheels by size, only by fitment. It seems like there would be other fitments you could use with a stagger, but their site makes that very difficult to find.