Question about deep dish wheels

[UrbanRedneck]

How do they achieve the extra lip? Do they manage to just tuck the spokes in closer to the brakes (like different angle), or do they stick out further than normal wheels (that is the most logical answer)?

If they stick out further, anyone that has them have you noticed an increase in rocks and whatnot hitting the sides of the car and possibly chipping paint? I love the look of the black deep dish Bullitt wheels, but I daily drive my car and don't want to cover it with rock chips from tires sticking way out.

 

[Frank07GT]

Most of the wheels for the S197s are designed like you described at first. The spokes go outward to clear the brake calipers, then they tuck in toward the tire bead. That is the way they obtain the deep dish look. This is even apparent on the GT500 wheels.

The attached pic of my Razors should help the explanation make more sense.

View attachment 54696


The important thing to watch out for if you buy new wheels is the offset. I am no expert on the topic, but I learned from research that most aftermarket wheels for our car need to have +40MM offset in order to avoid having the wheels stick out beyond the fender flares.

My 20x9s (+40MM) do not stick out much (if at all) further than the stock tires, so I haven't noticed any increase in stones being carried up into the paint.

Hope that helps!

 

[TRIBALMAN23]

Did you have to upgrade your brake system to install the 20's?
I have been looking at getting new wheels and tires and was going to go with 18's, 19's are to hard to find and almost twice the price of 18's. Plus do you know if the 20's will scar if you are cornering to hard, I drive mine as a daily driver too and play with it a least once a month! I don't want to spend money on wheels that are too big and risk scaring them while cornering aggressively..

What offsets should I look for in 18's compare to 20's?

 

[Frank07GT]

TRIBALMAN23

There is no need to upgrade brakes in order to put larger wheels on your car. There is typically more space behind the aftermarket wheels in case you DO choose to upgrade your brakes in the future. If you look at the factory 17" bullet wheels, you'll notice the GT calipers are extremely close to the wheel - not much room for bigger brakes.

I don't know what you mean by them scarring? I drive my car very aggressively and have not noticed any damage to them, if that's what you're asking.

I would suggest you search around on this site for more threads covering wheel offset to get a more definitive answer about the offset you need with 18s.

As far as aftermarket wheels (such as 20s) being too big, the outside diameter of the wheel / tire combination is almost exactly the same size as the stock 17" Pirellis. There is simply more wheel and less rubber

 

[UrbanRedneck]

What mods were done to the car in your sig when you ran that 13.1 @ 107? That MPH is good for mid 12s... What track were you at, Byron?

 

[Frank07GT]

UrbanRedneck,

I ran that time with only the mods listed in the sig (SCT tune, C&L CAI) I had the Steeda lower control arms on as well, but they obviously didn't help with the MPH! If I had better 60' times, I would likely have dipped into the 12s that night.

I ran it only that one night - at Great Lakes Dragaway in Union Grove, WI.

Since then I added the Steeda underdrive pulleys. Next time I get a chance, I want to see if I can do any better up there.

 

[UrbanRedneck]

Wow, that seems a tad faster than most cars with the same mods. Then again I guess that Brenspeed went 12.9 with just a CAI/tune, but on slicks.

I plan to soon get a CAI and tune, and I will be using MT ET Street Radials, I wonder if I can get close to the 12s. At Byron last week the best I could do was 14.2, but everyone was running slow, it was over 80 degrees, and I only had 3 runs for practice.