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Tech Forum => Workshop => Topic started by: Green Jeep on September 08, 2009, 09:04:40 PM

Title: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: Green Jeep on September 08, 2009, 09:04:40 PM
I have two sets of tyres, one 34" Super Swampers (narrow 8" tread) and 33" Maxxis Buckshots 285/75 R16, like BF muds.

When competing in punch hunts I can see big advantages to either, clearly the Swampers are awesome in thick mud, but on wet rocks the Maxxis rock.

I've seen comments where people have run a mixture of tyres and wondered if anyone could offer any thoughts...

At mo drivetrain in stock, 4" lift, LSD in rear, I have a Aussie Locker for the front... all ideas welcome, thanks in advance Maf

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Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: Bishops Finger on September 08, 2009, 09:31:41 PM
Maf

From what Ive read it can lead to transmission/diff wind up issues....
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: Nosebolt on September 08, 2009, 09:34:47 PM
heard the same, even to the extent of worn at one end and new at other can cause windup, don't know how true but def seen it some where
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: greggmo on September 08, 2009, 09:55:40 PM
all four boots must have the same diamiter or you will break stuff you dont want to.
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: isle of man on September 08, 2009, 10:12:21 PM
Some of the mud runners in America have different axle ratio to make the front spin faster than the rear - go figure?
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: Panic mechanic! on September 08, 2009, 10:26:48 PM
I beleive that is done to help lift the front tyres clear of the mud and help it skip over the surface. its fine when you are in super slippery mud, not on anything else.
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: Dave69 on September 09, 2009, 04:46:31 PM
34" rear and 33" front = something bust in the driveline or transmission.

would wide at the rear and narrow at the front be a benefit ? but keeping the same overall diameter
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: Panic mechanic! on September 10, 2009, 06:14:28 PM
 :017: it may help understeer dave......... :017:
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: Dave69 on September 10, 2009, 06:28:10 PM
a heavy right foot helps that as well
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: Bubba on September 10, 2009, 09:06:50 PM
i have seen over the years directional tyres fitted the wrong way round to maximse traction in both  directions used to be common trick on ex army timber tracktors and have seen it on froaders
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: isle of man on September 10, 2009, 09:23:59 PM
i have seen over the years directional tyres fitted the wrong way round to maximse traction in both  directions used to be common trick on ex army timber tracktors and have seen it on froaders


Confirmed.
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: doublej on September 10, 2009, 10:46:11 PM
i dont care what the side wall says, what does a tape measure read on them? an inch diff between them cause something to break? id call BS on it real quick. how does front tires half full of water sound to ya? but im still young and dumb.
the ideas you are getting into are part of test and tune. its gonna depend on you, the rig, and how you work it. try it and let us know. cause i know other people do it
Title: Re: Running different tyres front and rear for off roadin... YJ Wrangler
Post by: JamesH on September 16, 2009, 06:14:05 PM
I don't see that you'd break it that quickly on slippery surfaces but it's not something I'd try. Different tyres are better at different things. I've heard SS Iroks and the original TSL do well at both mud and rocks. I just accept that my cooper stt's aren't up to swamper or simex ability in the mud but enjoy their advantages on other terrain, including the road.

I'd go with Double J's idea of test&tune, try a load of different combinations one day out on site and see what happens.