When shopping for new RX8 wheels there are a couple critical issues to
Weight. The Mazda RX8's fine handling and ride quality is very
sensitive to what is called "unsprung" weight (which can best be understood
as what hangs off the RX8 suspension rather than what sits on it). More
than most automakers, Mazda tunes and equips its sports cars with very light
wheels and owners should be very careful about keeping the weight down when
they select replacement RX8 rims. Most RX8 owners can feel a deterioration
of ride quality from a gain of as little as 3 pounds per corner in unsprung
weight. We therefore strongly recommend that you use only light weight
wheels for your RX8 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. RX8 wheel offset causes a lot of confusion. Here is
a simple explanation. If the rim is 8 inches wide, and the mounting surface
of that rim (backside of the bolt holes), is 4 inches from either outside
edge, 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
Japanese cars. The Mazda RX8 factory 18x8 inch wheel has an offset of 50mm.
A 40mm offset choice is moving the track wider by 10mm per side. RX8 owners
looking to stick to stock width can consider any of the offsets we offer
here, but RX8 owners looking to go with substantially wider tires should
stick to our 45 to 48 mm choices. For those looking to mount maximum tire
width for autocross or track events see our 45mm 18x9.5 RP-F1 alloys which
are lighter than stock wheels but allow 265/35, 275/35 and even 285/30/18s
to be mounted on all four corners of an RX8.
Shop our RX8 2004-2011 Wheels catalog by clicking below:
I just installed the Borla exhaust on the MX5. Sweeeeeeet!
Brian, just wanted tyou to know you've got another highly satisfied customer. I got my RoadstersportIII muffler on Friday, installed it in 20 minutes, looks and sounds awesome. I like the baffles out!! My new tires/wheels came Saturday, just got them on and test drove them. Fantastic!! And how they look--- just what I was after. I will add the front "mud flap" that looks like the rear one, for some stone protection, but the offset was just what I was working for. I'd love to send you some pictures for your photo gallery. If you'll send an adress via e-mail, I'll send some high-res photos showing clearances and side profiles, etc. The graphite spokes and polished rims really set well on my black car.
Thanks again, me and my wallet will be back!!