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Old May 16th, 2018, 07:46 AM   #1
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Default wheelbase

what is a good all around / ideal wheeling center axle to center axle wheel base for 38"-42" tires ?
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Old May 16th, 2018, 07:57 AM   #2
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IMO, 106" - 115" I'm 106 with 39's and observing others when wheeling, I'd like to be 108 to 110. My observation is that any longer starts creating break over issues. However, I get around pretty decent at 106.
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Old May 16th, 2018, 08:00 AM   #3
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117"
Just saying that because thats what i'm at lol. But i feel like they all have ups and downs. Too long is awesome on climbs but shitty for trails and turning, then the opposite is true. I always feel like people building buggies try to be 110-122.
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Old May 16th, 2018, 08:09 AM   #4
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117"
Just saying that because thats what i'm at lol. But i feel like they all have ups and downs. Too long is awesome on climbs but shitty for trails and turning, then the opposite is true. I always feel like people building buggies try to be 110-122.
Depends on tire size and the type of wheeling you want to do. No way I would want to be that long on 39's and rock crawling. Now, if all you want to do is run high speed at the dunes or be a hill killer, that's a different story.
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Old May 16th, 2018, 08:10 AM   #5
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I'm going from 105" to 109". With a belly height of about 19" I'm worried 109" is going to be to long but I'm pretty much forced to do it with my new front end set up.

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Old May 16th, 2018, 08:17 AM   #6
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Depends on tire size and the type of wheeling you want to do. No way I would want to be that long on 39's and rock crawling. Now, if all you want to do is run high speed at the dunes or be a hill killer, that's a different story.
Yeah i was figuring with 40+ tires and standard midwest wheeling. I have a 21" belly and i dont find myself getting caught up on too much stuff. there is no perfect number, but goatbuilt specs out 110wb for their kits.
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Old May 16th, 2018, 08:22 AM   #7
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38-40 tires rockcrawling I'd say < 106-110 wheelbase and 19-20 belly
42-43 tires rockcrawling I'd say 112-118 wheelbase and 20-22 belly

Seems like the guys wanting big climbs over getting through tight trails add 8-10" of wheelbase and have a bit more belly to help with breakover
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Old May 16th, 2018, 08:23 AM   #8
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Yeah i was figuring with 40+ tires and standard midwest wheeling. I have a 21" belly and i dont find myself getting caught up on too much stuff. there is no perfect number.
I guess we need @siettas81 to define what type of wheeling he wants to do.

Here is something to think about. The Ultra4 guys run a combination of high speed desert to extreme rock racing. (not technical crawling) Most of them are running 40" tires and most of them are < 115" wheelbase. If you are going to drop > $150,000 on a dedicated race rig, you would probably design around the best wheelbase for your rig.

The technical rock crawling guys run about the same, maybe a little shorter.

Now go to the other extreme to the rock bouncers. They are all running > 42" tires and have much longer wheel bases.
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Old May 16th, 2018, 08:30 AM   #9
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I guess we need @siettas81 to define what type of wheeling he wants to do.

Here is something to think about. The Ultra4 guys run a combination of high speed desert to extreme rock racing. (not technical crawling) Most of them are running 40" tires and most of them are < 115" wheelbase. If you are going to drop > $150,000 on a dedicated race rig, you would probably design around the best wheelbase for your rig.

The technical rock crawling guys run about the same, maybe a little shorter.

Now go to the other extreme to the rock bouncers. They are all running > 42" tires and have much longer wheel bases.
this is the internet. We aint got no time for real information and sound advice Make it 140" with 54" tires and 4 wheel steer!!
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Old May 16th, 2018, 08:32 AM   #10
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That's about what my RC car is scaled at. LOL
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Old May 16th, 2018, 09:44 AM   #11
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Quote:
Originally Posted by whiterhino View Post
I guess we need @siettas81 to define what type of wheeling he wants to do.

Here is something to think about. The Ultra4 guys run a combination of high speed desert to extreme rock racing. (not technical crawling) Most of them are running 40" tires and most of them are < 115" wheelbase. If you are going to drop > $150,000 on a dedicated race rig, you would probably design around the best wheelbase for your rig.

The technical rock crawling guys run about the same, maybe a little shorter.

Now go to the other extreme to the rock bouncers. They are all running > 42" tires and have much longer wheel bases.
just looking for input, this winter i am stripping parts / drive line from my truck and putting them onto a new cab i bought to be smaller and not fool size anymore, would like to be decent at hills, rock crawling but still be able to rip about dunes. planning to build somthing close to ultra 4 style rigs with straight axle, coilovers and by passes on all 4 corners with trailing arm 4 link in rear
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Old May 16th, 2018, 09:45 AM   #12
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been thinking 108-110 range
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Old May 16th, 2018, 09:47 AM   #13
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Tire size?
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Old May 16th, 2018, 10:08 AM   #14
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Tire size?
39.5-42s
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Old May 16th, 2018, 11:36 AM   #15
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all around wheeling? 113. tighter trails and rocks, 108.
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Old May 16th, 2018, 12:50 PM   #16
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I agree with most of the ranges stated here. It comes down to personal preference, but also how the rig is built. The shorter it is the more suspension geometry and overall balance will matter. My TJ is relatively short at 103", but it's stable as hell and can climb a lot more comfortably/safely than a lot of longer wheelbase rigs because it's set up well. Sometimes more wheelbase is a bandaid for a bad setup. If your rig tries doing a wheelie every time you're climbing under throttle you don't necessarily need more wheelbase, you need to correct your geometry and possibly your shock setup. Even with good setup there's obviously a limit for safe climbing or easy maneuverability, that's where the ranges mentioned come in.
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Old May 16th, 2018, 01:15 PM   #17
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If your rig tries doing a wheelie every time you're climbing under throttle you don't necessarily need more wheelbase, you need to correct your geometry and possibly your shock setup.
I often see too little separation on the chassis side of the rear 4 link. Causes the rear axle to roll and hop when loaded on climbs. Too much separation is better than too little.
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Old May 16th, 2018, 01:24 PM   #18
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Love to see this kind of tech talk on GL. Who says this forum is dead
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Old May 16th, 2018, 01:35 PM   #19
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^ X2

When I was building my junk, the people on this forum went out of there way to help keep me from screwing it up.

I do not have experiance with many rigs at all, but my jEeP at ~103" climbs pretty good and has not felt to short yet.....
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Old May 16th, 2018, 02:26 PM   #20
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Love to see this kind of tech talk on GL. Who says this forum is dead
Yeah, it's too bad there's not a sub forum for this stuff...
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