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Thread: Bias and Radial ATV Tire Test

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    Bias and Radial ATV Tire Test

    We had a unique opportunity to test the DWT Moapa Bias ply tire and the Maxxis Bighorn Radial ply tire in the smoldering heat of the Arizona desert. Here's how it went.

    The information gathered from this test is from one day of riding. These results could change if tested over a longer period of time. Your results may vary depending on
    your vehicle, riding style and terrain. For more information on Radial and Bias constructed ATV/UTV tires check out the what's what article here: ATV Bias Ply Tires or Radial Tires
    My good friend Johnny and I met Haim Yanai, the US Director for TomCar, out in the Arizona desert north of Phoenix. Haim had two TM5 Tomcars waiting for us. One was fitted
    with the DWT Moapa (Bias) and the other with the Maxxis Bighorn (Radial).


    Testing Specs:
    Here are the sizes along with the specs for each tire model. The Brown car is equipped with DWT Moapa Bias ply tires and the Green car with the Maxxis Bighorn Radial ply tires.

    DWT Moapa: Bias Ply Construction
    Shop for DWT MOAPA Tires


    • 26x9-12 - 6 Ply
    • Weight - 23lbs.
    • Max load - 638lbs.




    • 26x11-12 - 6 Ply
    • Weight 29lbs.
    • Max load 737lbs.





    Maxxis Bighorn: Radial Ply Construction
    Shop for Maxxis Bighorn Tires


    • 26x9R-12 - 6 Ply
    • Weight - 23lbs.
    • Max load - 410lbs.




    • 26x12R-12 - 6 Ply
    • Weight - 30lbs.
    • Max load - 520lbs.





    We picked a harsh desert area north of Phoenix AZ which is favored for testing because of the vast area of terrain. This area is also known for chewing up tires with sharp loose rocks.
    Test #1: Short Hill Climb
    Our first stop was along a trail where there were several steep descents and inclines. We went up from the bottom of the hill in both vehicles, once in low and once with the rear
    diff locked, to try to feel the difference. I thought this would be a good place for a warm up as I had much bigger obstacles in mind but I needed to make sure the 2 wheel drive
    TomCars would be able to handle the really tough stuff.

    Both cars went up the hill and climbed equally well.
    Moapa Bias

    Bighorn Radial

    Test #2: Steep Hill Climb
    From here we went to a spot with a very steep hill climb that had some horrible ruts and loose rock. This obstacle would surely test the tires to their max. A couple of
    years ago I took some buddies down this same hill on quads. It's so steep that one of them rode with his feet on the front fenders (trying not to go over the handlebars!)
    while complaining about how steep and loose it was! Plus you have to make a few turns in the middle of the hill.

    Here's the sign you see as you get to the fun part of the hill climb.



    We decided that Haim and I would take 4 runs up the hill switching each time to see if we could tell the difference in the hookup/performance of each tire model.

    I let Haim go first as they are his cars. I watched in amazement as I could see one of his front tires in the air as he hit a deep rut on one of the steepest part of the hill.
    From behind it looked unsettling but from inside the car, as I would soon find out, it was quite smooth.
    Bighorn Radial



    Moapa Bias




    Now it was my turn to run before we discussed our thoughts as to which tire did better.

    My first run I had Johnny ride shotgun.
    Bighorn Radial



    Moapa Bias




    Wow, what a fun time running up and down this nasty hill. When we pulled up there were a couple of rock crawling buggies looking at us with a look like “you guys can’t
    make that hill with those 2 wheel drive Tomcars”. We sailed up the hills with no problem.

    As we took a break to discuss how the tires did it was amazing how close our thoughts were. After our first run up the hill in different vehicles we each thought "wow, this
    tire was great". Then after testing the other tire up the same hill our reaction was, again, "wow THIS tire is ALSO great". It was impossible to tell any difference in traction
    from one tire to the next. That is not a bad thing, but I did not expect them to be this close.
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    Re: Bias and Radial ATV Tire Test

    Test #3: Rock Crawl

    Now off to my favorite part, a short rock crawl. I picked a spot again that I have done on 4x4 quads before. It not only has ledges, but has loose shale type rock that is
    hard to get traction on.

    Haim again went first and took Johnny along.

    Bighorn Radial











    Moapa Bias







    Once again we talked after we both had our turns in each vehicle. My first thought as I watched Haim having some problems with the Bighorns Radials was that the
    Moapa’s Bias ply did better since I breezed through the rocks. Then I switched to the Bighorn Radial and made it look equally as easy. I believe I just happen to take
    a better line. Both tires grip the rocks extremely well. I would have no problem running either tire on my vehicle. I navigated the 2 wheel drive machine up a couple of
    ledges that I didn't think was possible in 2 wheel drive but both tires flexed on the jagged rocks and gave me all the grip I needed.

    Test # 4: Cornering

    As we were heading back towards our staging area I stopped where the road makes a 90 degree turn. The road at this spot was fairly smooth with a loose granite surface.
    I asked Haim if he would take each TomCar and see if he could get them to slide. He made three passes with each tire and for the first time said he could feel a difference.
    He said the Moapa Bias ply tires did not slide and wanted to track around the corner.



    The Bighorn Radial on the other hand could be pitched sideways and slid around the corner.

    The difference does not make one better than the other, just different. There are situations where you may want the tire to either stick or slide depending on what you are looking to do.



    Test #5: Sand

    For our last test of the day we headed over to some small sand hills. We tried them again back to back with the same results. We were able to go about the same
    distance with each tire before digging into the soft sand. On one run in low with the Bighorn Radial, I went until I was digging in and engaged the diff-lock lever then
    floored it. We started moving but were soon buried to the frame.



    It was fun though, throwing a huge roost of sand. Oh well, Haim was there to pull me out. We did one last run with each machine in low and with the diff-loc engaged.
    Both machines made it with ease.



    Test #6: Visual Inspection

    When we arrived back at the trucks we inspected the tires for any damage. The only thing we found was that the Maxxis Bighorn radials showed some signs of wear/chunking
    on the tread blocks. I say this was probably due to a few instances during our rock crawl test. The rocks in that section of the test were very jagged and sharp. The DWT
    Moapa bias tires showed no signs of wear from this ride.

    Bighorn Radial



    Moapa Bias



    Final Thoughts/Conclusion:

    Both tires performed remarkably well for the extreme conditions we put them through. Our original thoughts were that we would see some very stark differences between
    the Bias ply and Radial ply tires but for our test we found very little difference. We even remarked if we were blind folded when we got in the vehicle and never look at
    the tires we would not be able to tell which tires we were riding on.

    If we look at the prices there is a pretty good difference between these two models (Moapa being less expensive). Given the very similar performance characteristics we
    experienced here the Moapa may be a better buy if you are on a budget.

    The two biggest factors that may have affected our results are the TomCar's suspension and weight. The Tomcars we were testing have 17 inches of travel so they can soak
    up a lot of bumps and imperfections in the terrain. Also, the TomCars tested weigh in at 1848 lbs dry. These two factors help give the Tomcar an exceptionally smooth ride
    but may have made it difficult for us to feel subtle differences between these two tires.

    The only spot where we felt there was discrepancy between the two tires was trying to slide the machine sideways. The Maxxis Bighorn Radial would slide through the turn
    but the DWT Moapa Bias ply did not want to slide. They would grip and pull through the corners rather than slide.

    We would not be disappointed with either of these tires after seeing the results of our testing. They both held up very well, especially considering we were trying to see if we
    could destroy them. Future tests on other vehicles may be down the road.

    Discount Tire guarantee's the lowest delivered price on both the Maxxis Bighorn and the DWT Moapa. Please contact Discount Tire Direct for any of your fitment needs or if
    you need a specific size. We would be glad to help you find the correct ATV/UTV tire for your particular riding style or terrain.

    Remember to always ride within your comfort zone, be safe and have fun.

    Don McNeilly
    Discount Tire Direct[/SIZE]
    Low Prices! More Choices! FREE Shipping!
    At The Store: discounttire.com
    To Your Door: discounttiredirect.com

    Sales and Technical: 1.888.459.4080

    Useful Links:
    Shop ATV/UTV Tires
    Shop ATV/UTV Wheels
    Current Promotions

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