Quote:
Originally Posted by TurboLag23
This has me super excited - you guys have done an excellent job with the R&D on these!
Question: I am in the crowd who has 17x9's with 245/40R17 BFG Sport Comp 2's. Will stay with this wheel and tire size indefinitely, but may switch compounds in that ~300 treadwear zone. Currently stock everything else, but am strongly considering the suite of mods that basically make up your "Big Grip Pack". My car is a daily primarily, which sees relatively frequent spirited canyon drives and the very occasional autocross. I have zero concerns regarding ride height - a touch lower would look nice but I like being able to get over driveways with zero hassle and these cars look great regardless  But for reference on your numbers, what is pinch weld height on OEM suspension?
Given that wheel/tire pairing and prescribed use, would the street spring be the move? Or would you recommend going one step firmer with the springs to account for the larger wheel/tire? I notice that your Miata Xidas have spring options galore - will the 86/BRXidas be the same way? |
Decision comes down to:
Equal or better than OEM ride quality - Street Spring Pack
or
Max grip, who cares about spilled latte's - Race Spring Pack
Both handle better than stock, Street springs run out of rate for the grippiest tires. Race springs perfect for the grippiest tires.
3rd option is custom rates of your choice which would add roughly $200 to kit.
OEM pinch weld height on OEM tires is 150/165mm depending on year/brand/model. This assumes OEM tires. Most track rats run a taller 25" 255/40/17 vs the OEM 24.5" 215/45/17