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Tires for old Mudpuppy / Multimobile

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  • Tires for old Mudpuppy / Multimobile

    So, I bought this old Mudpuppy / Multimobile a couple years back, and I have been rebuilding it from the ground up with some modifications. I only need a few parts before I start assembling it, which I hope to do over the winter.

    I am ready to buy tires, wheels and hubs. Trouble is, the original tires were 20" and there are only 22" between the axles, so options are very limited.

    This 6x6 is very lightweight and has relatively weak axles. I think it only weighed about 335lbs. when new. It will be somewhat heavier now, and I don't want to add heavy 4 ply tires if I can help it. Soft tires would reduce impact on the axles and give a better ride, and less traction would be easier on the drive train. I do want it to swim, but not at any cost. This will be for puttsing around with my young kids, not heavy duty use.

    My main concerns, in no particular order:

    Lightweight, because it is not a powerful or heavy duty machine.
    Soft for a better ride and to reduce shock on the puny 3/4" axles.
    Cost. I will not pay Argo tire prices for this old tub.
    Appearance.
    Swim ability.

    Also, I plan to use 4-4 hubs because I can't find any 5-4.5 hubs to fit the 3/4" axles, and I don't want to make them. So whatever tire I use, it has to be compatible with a wheel that I can get with 4-4 bolt pattern.

    I really wanted to use Maxxis m910 tires, but can't get the size I need. Then I thought I could use Caribou CS15, but same problem. Carlisle AT101 21x11-8 might fit, but they are a little heavier / stiffer and I think they would be a rough ride.

    I know most people here don't care too much for these old pieces of junk, but I like them. And I also know I could just go buy an Argo and forgo the hard work and expense, but it is a labor of love and opportunity to use my skills fixing things. I also have a Kadoo II I plan to do after this.

    Any helpful suggestions about the tires would be appreciated.
    Last edited by Zach; 10-05-2020, 03:50 AM. Reason: I wrote something wrong.

  • #2
    If you want some ultra light cheap tires. Deestone https://simpletire.com/paid?v=1&tire...97e37c2193f28a
    D402 tires are a little over 17" and will give great traction, should even swim a little being V tread. They are a bit in the narrow side compared to normal AATV tires, but at this machines weight that won't be an issue.

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    • #3
      Well, the price is right, that's for sure! But I think they would be too stiff and a rough ride. I will probably use the AT101, but I appreciate your suggestion. BTW, is that a Quadractor in your avatar? I can hardly see it but it looks like it. I sure would like one of those. Been looking on and off for a long time, but never see any when the time, location and $ is right lol.

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      • #4
        Hard to say, they may be stiff. The AT101 should work fine, these balloon tires are very dependent on inflation PSI for their size, so if they are a tad too big you could always decrease the PSI and they should shrink.
        Good eye, yep that's a Quadractor. You can see videos of it on my youtube channel https://www.youtube.com/watch?v=w7AJ83UA6yc
        Currently having engine issues. Not sure if I want to rebuild the engine or convert it to electric.

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        • #5
          Yeah, I think I will have to go with the AT101. Not my first choice, but stopped by Discount Tire today to see if they could order the M910 I wanted. The said they could before, but are no longer able to. So I guess the AT101 is probably what I will do. Still not 100% sure. I built a 24V electric tractor - or I should say, I am building and electric tractor. It's nearly complete, but I need to make an idler pulley / clutch / brake system and make a "throttle" assembly. But it seems to all work pretty good. If I had to do the Mudpuppy over again, I think I would have made that electric. It has an interesting original design, but I never thought it was very efficient, and there is no space for a bigger motor than the one I m using, so I think electric would have been a good option. I had to reconfigure the frame for the motor and I also installed a reverse gear, so it's not like I'm keeping it all original anyway. It would be interesting to see an electric Quadractor, I hope you do it. I like the quiet of these electric vehicles. Thanks again.. Going to go watch your video now.

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