widest tire on 15x10

[Shon]

What is the widest tire one can fit on these 71 trucks on a 15x10 rim with stock width axles and lowered 4-5 inches. no spacers.

going to need meat but not going to cut the truck.

[Super73]

Got a back space for us to work with?

[Shon]

15x10 T'stars with 5.5" BS

[Hart_Rod]

Is it tubbed? IF not, I think a 11-12" is about as big as you'll get. Tub it like my 68, and the sky's the limit, . I currently have a 12" wheel with a 15.5, but I'm looking to go to a 15" wheel with a 18...

[Hottrucks]

hey Rob I thnk we are stuck where we are with the 15.5's that tire will rub on the spring( see your second pic) or the bed..you pick..I have run the #'s and I can't make it work...check the section of the 18's and you'll see...the combo of the added 3" of rim and side wall bubble make it imposable with a stock suspention

[Ackattack]

Originally Posted by Hart_Rod

Is it tubbed? IF not, I think a 11-12" is about as big as you'll get. Tub it like my 68, and the sky's the limit, . I currently have a 12" wheel with a 15.5, but I'm looking to go to a 15" wheel with a 18...

What kind of back spacing do those 12" wide wheels have? And do your tires tuck into the fender wells?

I tubbed my truck too, and I'm thinking while at the track, I need clearance for the tires to tuck on hard launches (plus I'm lowered anyways)

I was thinking probably about 8 - 9" backspacing for a 12" wide wheel.

[Hart_Rod]

Originally Posted by Ackattack

What kind of back spacing do those 12" wide wheels have? And do your tires tuck into the fender wells?

I tubbed my truck too, and I'm thinking while at the track, I need clearance for the tires to tuck on hard launches (plus I'm lowered anyways)

I was thinking probably about 8 - 9" backspacing for a 12" wide wheel.

They have a 6" backspacing, which gives 7" out from the drum mounting surface (it's the wide rearend also). I'm about 6" lower than stock in the rear right now. I've got a couple more inches to tuck before their is any interference. I think with a 20" wheel and 29" tire that there would be less ballooning which would provide some additional clearance. How hard do you plan on launching?

R/

[Shon]

Originally Posted by Hart_Rod

How hard do you plan on launching?

As hard as it will with 100% throttle

[Hottrucks]

heres a pic of my tires..this is slammed with a 2 1/2" c notch..these are 31x15.5x15 and I build the truck for 29's so they rub about 1/2" from full dump..my rims are stock rallies with 4" added to the back space ( dumb ass I never measured before I put them on) when I switch to radials it will all clear fine...my tubs are 4" wider..if you look at the stock tub I moved it one hole to the center

[Shon]

Wondering if 325/50 DRs will work....
Tire Diameter 28.00 in.
Section Width 13.10 in.
Tread Width 11.60 in

[Hottrucks]

your going to have to pick a tire size and build the truck around that..in other words how low and wide you want it to look..also if you you find an older (pre70) rear axle you will end up with a little narrower trac which will help with rubbing

maybe you need to take some measurements from what you have then we can GUESS on a choice

[Shon]

I will just pick a tire that will fit and make it work.
only reason I mentioned the 325/50 is b/c a buddy had 2 sets i can use.

[Hottrucks]

Originally Posted by Shon

I will just pick a tire that will fit and make it work.
only reason I mentioned the 325/50 is b/c a buddy had 2 sets i can use.

then I would grab one lift you truck up ( by the axle) take your wheel off and see how it looks and fits......since your not going to tub you can get a good idea and rotate your tires at the same time..???

[prostreetC-10]

One thing that doesn't look like it's been mentioned is that certain width tired are designed to go on certain minimum width wheels. Just because the tire machine will get it on doesn't mean it's right or safe. In a perfect world, you want the edge of the tire tread to be parallel with the edge of the wheel. If you have a 12" tread width and a 15" center section on a 10" wheel. That is not good. Changes how the bead of the tire meets the wheel. really hard on the sidewall too and it will start to crack over time. Just a thought.

[Hottrucks]

^^^^ Good point^^^^

[68GMCCustom]

all true with todays lower profile tires. with a taller profile (70 up) you can get away with a wider tire/narrower wheel scenario...but not by much.

[SCOTI]

325-50's are a common size used on 10" wheels.

[Shon]

Originally Posted by SCOTI

325-50's are a common size used on 10" wheels.

these tires do fit on the 10" rears per Manfucturer's rec but do they fit a 71 in stock form with T'star 5.5" BS

[SCOTI]

5-5.50" back-spacing is common to 71-87's for a 10" wheel. You need to measure your truck to be certain they'll fit. What fits one may not fit another; always verify your set-up.

What is currently on the truck?

[ratrod67]

I have ran the 315/60's on 2 trucks. I used a 15x10 wheel with 5 inch backspacing both times.

72 LWB

[Shon]

Originally Posted by SCOTI

What is currently on the truck?

currently using BFG 275/50/15 on 15x10 rally, this tire is not going to work with what I got planned, I am going to need more meat!

[KQQL IT]

hoosier d/r 325/50 on 10 doing work.

[Shon]

right now with no suspension mods and the 26" BFG DRs it doesnt like to be hit out the hole with the 100 shot, I can hit it about 30-40' out and it is fine so I will be going to 28" tall tires for looks and to get more meat and I hope to eventually put 150-200 shot from a Nitrous Outlet Plate system. And while doing all of this it will eventually have heads and cam plus a GOOD stall TC (yank or vig/PI). If I follow the recipe of the others cars I have been involved in, I should be able to make 475-500 to the wheels on motor.

[Hottrucks]

better check your class regs before you get to carried away....I'm sure you know that the shorter the tire the harder it wil hit.....

more meat may not be your answer either pick ups suck at weight tranfer....theres a few guys here that know WAY more about getting these to hook up ( I need to learn too) I was thinking about mounting my battery under the bed in front of the DS wheel it will clean up the engine bay and move the weight...

[Shon]

Originally Posted by Hottrucks

better check your class regs before you get to carried away....I'm sure you know that the shorter the tire the harder it wil hit.....

more meat may not be your answer either pick ups suck at weight tranfer....theres a few guys here that know WAY more about getting these to hook up ( I need to learn too) I was thinking about mounting my battery under the bed in front of the DS wheel it will clean up the engine bay and move the weight...

Luckily I do not class race, I just go to TnT nights/days and track days that groups put together.
I thought about the same thing, moving battery for cleaning up things and gettin weight off the front, have not even started looking into it yet but might....
I will eventually get a tank relocated under the bed for some weight back there.