18" drag radials
FWIW, I wouldn't put a free pair of Nitto 555 DRs on my car.
To calculate tire size: Divide the "big" number by 25.4, then multiply that by the aspect ratio, multiply times 2 (because there is tire on the top and bottom...lol), and add the rim height. Example for a 285/40/18 - 285/25.4=11.22 (width in inches); 11.22x.4=4.48; 4.48x2=
8.97; 8.97+18=26.97 - So that is approximately a 27x11.5x18.
MT makes the following sizes for 18"
245/40 - 26x9.5
315/30 - 26x12.5
265/40 - 27x10.5
305/35 - 27x12.5
345/35 - 28x13.5
305/45 - 29x11.5
Additionally, a company called M&H makes a drag radial in 275/45R18 and is a 28x10 equiv.
I would probably choose the M&H, they are also a great tire.
Both the M&H and MT are not really designed to be a DD tire, and they are not good in wet weather. That being said, I did get almost 10k miles out of my MT's and made regular trips to the strip. In my experience the BFG, Nitto, and Goodyear DRs do not provide as good nor as consistent of a result.
Usually the best prices come from either Jegs, Summit Racing, or Discount Tire.
Also, if you have the ability to have a second set of wheels just for your drag tires, I would recommend going with a 17" intead of an 18" for a few reasons:
1) The tires are easier to find
2) There are more sizes offered in a 17, and prices are cheaper
3) You can find 17" MT's used fairly easily
4) Taller sidewall does better for launching...there's a reason very few 9/10 sec cars have low profile tires.
5) You can fit a wider range of widths on a given rim, due to the taller sidewall.
For years I used 255/50/16 (26x10.5) MT ET Street Radials and had no problems running consistent mid 10's, so you don't need a huge tire.
If I can help you in any way, just send me a PM.
Last edited by FormulaZR; May 6, 2009 at 09:39 AM.



