Drag Radials
 

I would like to know what size rims I should use with 9 by 30 drag radials. Hoosier says either 8 or 10 inch rims but I would like some input from users. Thanks, Jim

Re: Drag Radials
 

I am using a Weld 15x 8 x 15 4 1/2 on my nova had Goodyears Eagles on 30x9.0x15 that is the rims size I am running Rich

Re: Drag Radials
 

10 inch

Shawn

Re: Drag Radials
 

If 10 inch fit use them, i have 9 1/2 on my max wedge

Re: Drag Radials
 

I use a 9" Hole Shot rim with my Hoosier radials @ 3500 lb

Re: Drag Radials
 

Call Larry Hodge he is the wheel and tire guy for stock and super stock cars 217-677-2358

Re: Drag Radials
 

Thanks for the contact info/
Jim

Re: Drag Radials
 

I have the M/T wheels 8" with 4 1/2 back spacing. M/T 30x9 with 94" rollout. When I bought the car it had 10" convo pro's on it BUT it had wheel spacers on both sides...2 on drivers 1 on pass! I run no spacers now.

Re: Drag Radials
 

I have 10" Holeshot wheels with 9" lightweight Hoosier radials weighing 3,540+ lbs.
A wider rim should allow more for more pressure, stability and sidewall life.

Re: Drag Radials
 

x2, Larry is very knowledgible on many different makes and combinations.

Wade

Re: Drag Radials
 

I run mine on a 10 inch rim.

Coach

Re: Drag Radials
 

It seems that a 10" rim with a radial tire is probably the most popular combination being used right now. I understand the logic behind that, with increased air pressure and decreased rolling resistance, etc., but what about the somewhat old school approach of using a narrower rim and a tire designed to grow a significant amount, allowing the final drive ratio to raise as wheel speed increases. I seem to remember a time when some of the tire manufacturers offered "high-growth" sportsman tires. The variable ratio effect would seem to me to be a real advantage if utilized properly ( i.e. steeper gearing) or has the wide rim/radial tire combination actually been proven to be that much better?

Re: Drag Radials
 

The reason I brought this up is that at one time there was a theory that wide tires on a narrower rim would provide more "bite" at launch due to the flattening of the tire providing all 9 inches at the hit, also the tire growth on the other end.

The other theory was that a wide rim with a narrower tire planted the tire for a longer period as the car accelerated from the line.

Just wanted to hear which wheel everyone was using with the radial.

Re: Drag Radials
 

i am new to the stocker game as well. i have a 3500 lb chevelle with 8" rims and the hoosier light weight 92.5 roll out tires - any advise for the starting point on air pressure?

thanks
Ian

Re: Drag Radials
 

Ian;
Are you running the #18209.... 30.0/9.0R-15 Hoosier, radial?
If so, I would start at 21 psi and work my way down (no less than 18 psi).
What do you run for a 60' time?

Re: Drag Radials
 

15x10 draglites with Hoosier 30x9x15 radial slicks, 94.5 rollout, C07 compound.

Re: Drag Radials
 

A radial slick will grow very little because of the radial design and rpm's are always higher when switching from a like-sized bias ply. So the growth theory would apply to the bias ply, but if the sidewalls are deformed too much and/or too often, the deformation can extend to the tread surface of the tire reducing it's footprint as well as simply wearing out the sidewalls. Lower pressures and narrow rims can also cause issues on the top end. But I've heard a few people say it works for them.

Worth noting is that a radial is more sensitive to track conditions. A bias ply will be more consistent and predictable under marginal conditions. But a radial is faster. So one has to figure out his/her priorities/needs.

Re: Drag Radials
 

Excellent response as usual Myron.