Looks like I may be keeping GP 1512 rather than selling it, so I'm off to make the ride more like I want it (more compliant). I've been researching wheel/tire combos and it looks like 16 inch may give me the best combination of ride quality, choice of tires and decent performance. I looked at 15" but there don't seem to be many choices in that size.
Here are OEM tire specs:
Dunlop Sport 01 DSST 205/40-18
Diameter: 24.4" Revs/mile: 840, section width: 8.3" (Based on 7.5 Wheel width")
I'm currently running:
Toyo Proxes 4 205/40-18 - (Based on 7.5 Wheel width")
Diameter: 24.5", Revs/Mile: 847, inflated width: 8.7"
I prefer to not lower the car any further with a smaller tire diameter due to the frequent scraping of the flexible splitter flap at current height. I understand the JCW
suspension on the GP results in lowering over stock height of about .6".
I am considering the following sizes:
Wheels: 16x7 or 16x6.5 with offset of approx 37-44mm. As I understand it, I am better off going towards the 44mm offset spec so the tire will not rub on the outer fender lip.
205/55-16 is appealing to me as it is slightly taller than OEM spec (less scraping of the front splitter flap), but Alex at the Tire Rack is recommending the 205/50-16 as a safer choice as there is a chance for rubbing at the top of the wheel well with 205/55-16.
Looks like 205/50-16 would fit with no issues, but gives me a lower height and greater difference for revs/mile.
Dunlop Direzza Sport Z1 StarSpec:
205/55VR16 - Diameter: 24.9", Revs/Mile: 837, Sec Width: 8.4" (Based on 6.5" Wheel width)
205/50VR16 - Diameter: 24.1", Revs/Mile:865, Sec Width: 8.3" (Based on 6.5" Wheel width)
If I go with a 205/50-16 is there a way to adjust the speedometer to be accurate?
Any advantages/disadvantages to 6.5" vs. 7" wheel width?
Any other opinions/recommendations?