33's or 35's w/ profab???

Run the largest tire that the rules will allow. This will get you the most traction. With your setup you won't have to worry about broken parts. Good luck wtih the new truck.
 
bubba2400 said:
Run the largest tire that the rules will allow. This will get you the most traction. With your setup you won't have to worry about broken parts. Good luck wtih the new truck.
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Ya hopefully there are no issues. Thats why I went this way with the drop box and rockwell. Start saving my money in broken driveline parts now and put that elsewhere.
 
CR785 said:
I dont know why it would be so different if you were running a 5spd and t-case verse your setup, i mean instead of changing tranny gears you are just changing drop box gears. To me i dont know why it would be so diffrent beside having differsnt ratios to choose from between both setups. But the whole tire thing versus taller gear thing makes you think a little bit.
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Not such a big jump. I can run a gear that is a very little bit faster/slower rather than dropping/upping an entire gear in the tranny. So ive pretty much got mixed response from it that it isnt to critical. If I had no tires go with 35s but since I already have 33s its not really worth buying new tires. Right?
 
2Tone12V said:
Not such a big jump. I can run a gear that is a very little bit faster/slower rather than dropping/upping an entire gear in the tranny. So ive pretty much got mixed response from it that it isnt to critical. If I had no tires go with 35s but since I already have 33s its not really worth buying new tires. Right?
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Seems reasonable to me. And, once you run the 33s and they become no longer effective due to the edges being gone or whatever and you need new tires, maybe then you could try the 35s. Then you'll know which is better and can continue to buy whichever size you felt was best from then on.


It's pretty cool seeing you get this thing together "in front of everyone" whereas many of them just get them together and you don't know or see much of it til you're at the pulls. Not so many "big time" builds done in the public's eye. So, hats off to you for sharing this with us. I thoroughly enjoy your threads asking all these questions.



C-ya
 
SmokeShow said:
Seems reasonable to me. And, once you run the 33s and they become no longer effective due to the edges being gone or whatever and you need new tires, maybe then you could try the 35s. Then you'll know which is better and can continue to buy whichever size you felt was best from then on.


It's pretty cool seeing you get this thing together "in front of everyone" whereas many of them just get them together and you don't know or see much of it til you're at the pulls. Not so many "big time" builds done in the public's eye. So, hats off to you for sharing this with us. I thoroughly enjoy your threads asking all these questions.



C-ya
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Well the only actual build Ill be doing is the motor. Everything else was already done other than some interior fabs. I have lots of questions. This is my first time in a truck of this nature. I dont why some people think that these type of things are secrets. Its available for everyone if you have the cash is the way I look at it (which i dont). Motor mods is something I keep confidential to a certain extent. I look at it like this. If all of us had the money. We can have a truck just like the mod guys. Pay to have it done and there ya go. That is definately not a shot at those guys. Great rigs. Just takes some serious bank!!
 
2Tone12V said:
Not such a big jump. I can run a gear that is a very little bit faster/slower rather than dropping/upping an entire gear in the tranny. So ive pretty much got mixed response from it that it isnt to critical. If I had no tires go with 35s but since I already have 33s its not really worth buying new tires. Right?
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I agree about the tires, my itpa truck runs 33's right now. I am getting ready to weld in the rockwell but am not sure if i am going to through the dough to the reverser and drop box yet. I want ot but i think i might wait, unless i totally destroy the tranny or t-case. At least i wont have to worry about the rear end:rockwoot:
 
Very true you deffently need to have a good cash flow.I myself have to fab everything up my self.You did it the rite way if you built that truck up from scratch you would have alot more in it.My opinion is if the tires you have are in good shape why spend more money on new ones put that money to motor parts.

Dale
 
But what if the 35's werent going to cost me any money. Are they better than running 33's? Seems mixed still.
 
35's will give you more traction. You should not have a problem keeping driveline under the truck with what you have. So that being a non issue the only thing you need to think about is power. Do you think that your motor will make enough power to spin 6 35" STS's? I would guess your going to need 1000-1100 hp to do it.
 
JerrodGlover said:
35's will give you more traction. You should not have a problem keeping driveline under the truck with what you have. So that being a non issue the only thing you need to think about is power. Do you think that your motor will make enough power to spin 6 35" STS's? I would guess your going to need 1000-1100 hp to do it.
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That shouldnt be an issue!:rockwoot:
 
Well anythony, what are you going to do? Just let me know about the tires.
 
2Tone12V said:
That shouldnt be an issue!:rockwoot:
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usually a 35x12.5 will have a marginally wider track than a 33x12.5, plus a larger diameter tire (even if width is exactly the same) will have a larger contact patch at the same PSI.

The only thing that starts to come into play is sidewall. A larger diameter tire on the same size rim obviously has more sidewall. Depending on the rim size and/or tire construction that can be an advantage or disadvantage.

The more sidewall you have the more PSI has an effect. Just for reference on my gasser (LOL:doh:) I have run 33's on a 16" rim and 35's on a 15" rim (after removing half the Dana 60 caliper with a grinder) and with both tires being a similar construction, the 35's are MUCH more sensitive to PSI changes. Before that I was running 35's and 33's on 16" rims and both behaved very similar to PSI changes. It was only a 1" change in rim size (less than the actual difference in tire sizes), but it had a big effect.

FWIW (and that probably isn't much), I would run 35's if possible and you have the motor (which it sounds like you do). I would run bigger tires on my diesel but I don't have the room (damn stock height GM) or the power at the moment.

Good luck whichever way you go.
 
I've seen trucks with 33/12.50 sts duals out back but maybe experiment with that since mounting such a wide tire on a narrow (dually)wheel will make it taller than if it was on a 16x10 or thereabouts. So maybe dually 33x12.50's out back and a 35 up front.

-Tom
 
Just to throw this out there, I think picking the correct gear (dropbox) is more important and perhaps more of a deciding factor than whether your running 33's or 35's. With enough motor and the right gear many trucks with 33's have come out on top.

-Tom
 
255/85 or maybe a 285/75 on back, with the 33 12.50 up front.
 
They don't make STS's in a 285 or a 255. I think he was wanting to run them in the back.

-Tom
 
Tcolesanti said:
Just to throw this out there, I think picking the correct gear (dropbox) is more important and perhaps more of a deciding factor than whether your running 33's or 35's. With enough motor and the right gear many trucks with 33's have come out on top.

-Tom
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Im thinking i agree
 
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