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question: large tires in the rear/smaller tires for the front on a 4WD

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question: large tires in the rear/smaller tires for the front on a 4WD

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Old 01-19-2008, 07:54 PM
  #1  
ekimusman2
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Default question: large tires in the rear/smaller tires for the front on a 4WD

im thinking about taking some larger than stock e savage tires and putting them onto the back of my truck and keeping the stock tires in the front

i've seen some cars with this setup, but what are the effects of this move?


thanks
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Old 01-19-2008, 08:07 PM
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Default RE: question: large tires in the rear/smaller tires for the front on a 4WD

That's a no-no with 4WD vehicles that do not have a center diff. The reason is in a locked transmission (or even locked center diff), the front and rear driveshafts spin the same amount. If you put smaller tires on the rear, the rear shaft will attempt to spin faster than the front, but it cannot because it is physically locked to the front.....so something in the trans or center diff will ultimately break. This would also apply if you wanted to run smaller tires up front and larger in the rear. Simple answer is don't do it unless you have a unlocked center diff.
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Old 01-19-2008, 08:16 PM
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Default RE: question: large tires in the rear/smaller tires for the front on a 4WD

omg thank you i was totally gonna try and bash around with that setup tonight

whew
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Old 01-19-2008, 08:25 PM
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Default RE: question: large tires in the rear/smaller tires for the front on a 4WD

Yeah, bad idea. VERY slight differences can sometimes be used on low traction surfaces, but generally its a no no
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Old 01-19-2008, 09:00 PM
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Default RE: question: large tires in the rear/smaller tires for the front on a 4WD

what about on a rear wheel drive car like a stampede?
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Old 01-19-2008, 09:06 PM
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Default RE: question: large tires in the rear/smaller tires for the front on a 4WD

Im glad I read this thread. I was about to run proline maxx paddles on the rear(5.5 inch), and stock MGT tires on the front(6.75 inch), but now I'll have to reconsider that thought. thanks guys!
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Old 01-19-2008, 09:16 PM
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Default RE: question: large tires in the rear/smaller tires for the front on a 4WD


ORIGINAL: ekimusman2

what about on a rear wheel drive car like a stampede?
Makes no difference on a RWD. Some understeer with smaller tires up front, but it will not damage anything.
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Old 01-20-2008, 02:31 AM
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Default RE: question: large tires in the rear/smaller tires for the front on a 4WD

even with an unlocked center diff its a no-no, because it will wear out the diff, since it will constantly be turning when you drive, and they arent made for that....
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Old 01-20-2008, 04:30 AM
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Default RE: question: large tires in the rear/smaller tires for the front on a 4WD

on a truck with a center diff the CD is always turning anyway, as soon as you hit the gas all the weight go's to the back wheel and all the power go's to the front, it won't make a difference in diff life.
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Old 01-20-2008, 05:39 AM
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Default RE: question: large tires in the rear/smaller tires for the front on a 4WD

no most of the time the front and rear wheels are turning pretty much the same speed, so there is very little diff action going one other than when the diff unloads to the front or rear....
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Old 01-20-2008, 10:45 AM
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Default RE: question: large tires in the rear/smaller tires for the front on a 4WD

Ya just off the launch the center diff has alot of action unless you have a serious mill in a vehicle with a center diff. Same applies with 1:1 scale vehicles you need all four wheels to be equal in diameter.
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