Tire expansion under throttle?

-
jrcr_15

jrcr_15

Well-Known Member
Joined
Jan 3, 2006
Messages
125
Reaction score
36
Hopefully this question makes sense.

I am looking at buying a new set of rear tires for my Duster. It is tubbed and I currently have a fairly large set of BF Goodrich Drag Radials on it. 345/55/15.

Published Specs
Tire diameter 29.8
Section width 14.6
Tread width 11.6

Unfortunately the same size is no longer available through BF G and I am looking at a set of Mickey Thompsons.

My concern is how much space I have in my wheel well with 'tire expansion'. Ie.. when I lay into it and the tires thins out and get taller. (Not sure if there is a specific term for this)

I guess my question is, is there a way to know how tall a particular tire will get when under throttle?


Side note.. if anyone has a set of said BF G tires mentioned above I would be interested in purchasing to save myself some work lol
 
FAQs

Click on “drag tires”
See “tire growth”

According to M/T, radial tires don’t grow.
Their slicks will grow 1” to 1.5”, unless it’s a high growth tire.

However, I believe any tire will have some growth at speeds....
 
If it is traction your concerned with the MTs wont need to be as wide as the BFs to get the same bite .
 
Approximately 1" in DIAMETER.

Keep in mind it will get slightly narrower as it gets slightly taller.

Unless you are ridiculously close to the front of the rear wheel opening you have very little to worry about.

This is a 28" wrinkle wall.

16378_10204960777488574_6317630999826702274_n.jpg
 
It also depends on the rim width, the wider the rim the less they grow
 
brian6pac said:
It also depends on the rim width, the wider the rim the less they grow
Click to expand...

And people OFTEN mount tires on wheels that are too narrow for the section width of the tire resulting in a wasted and ineffective tread width at any given PSI and in handling applications it equates to more sidewall roll.

The tire you see on my car are 28x12.50 MT Sportsman Pro tires. They are a 13.1 section width (advertised) They are mounted on 11.25" wheels. Most guys would mount those on 8-10" wheels.
 
MiradaMegaCab said:
FAQs

Click on “drag tires”
See “tire growth”

According to M/T, radial tires don’t grow.
Their slicks will grow 1” to 1.5”, unless it’s a high growth tire.

However, I believe any tire will have some growth at speeds....
Click to expand...
The deal is growth vs changing shape, the radial will change shape and the sidewalls/shoulders will stand up but if you taped it the overall diameter would have changed almost nothing. A slick by contrast will grow roughly 1-1.5 inches or so depending on the design etc. The problem is if you take out the technical jargon the radial is still basically getting bigger in certain areas like you suspect and if there is not enough clearance it can rub especially at the shoulders of the tire.
 
jrcr_15 said:
Hopefully this question makes sense.

I am looking at buying a new set of rear tires for my Duster. It is tubbed and I currently have a fairly large set of BF Goodrich Drag Radials on it. 345/55/15.

Published Specs
Tire diameter 29.8
Section width 14.6
Tread width 11.6

Unfortunately the same size is no longer available through BF G and I am looking at a set of Mickey Thompsons.

My concern is how much space I have in my wheel well with 'tire expansion'. Ie.. when I lay into it and the tires thins out and get taller. (Not sure if there is a specific term for this)

I guess my question is, is there a way to know how tall a particular tire will get when under throttle?


Side note.. if anyone has a set of said BF G tires mentioned above I would be interested in purchasing to save myself some work lol
Click to expand...
If are looking for a drag/dual purpose tire and not just some big radials to cruise with I would probably go smaller on diameter to make sure you have enough room. The manufacturer should be able to give you that info.
 
Here is an old one from the side
FB_IMG_1583384616027.jpg

Part of my issue is they fit so well i dont want to mess with the size if i do not have to
 
I can't see the rear of the wheelwell but the front seems to have ample space.
 
j par said:
Hells bells that isn't even close! I can barely stick a finger between my tire and the front of the wheel well with Hoosier slicks...
Click to expand...
Yeah thats ALOT more room then I have had on any of my street driven cars.
 
lead69 said:
Yeah thats ALOT more room then I have had on any of my street driven cars.
Click to expand...
That's after crafting a half-inch thick aluminum spacer between my front leaf spring shackle and the frame with longer grade 8 bolts. Had I not there would have been zero clearance LOL especially with 29 by 10 Hoosier slicks...
 
You must log in or register to reply here.
-

Back
Top