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STI Black Diamond XTR Radial ATV Tire
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    STI Black Diamond XTR Radial ATV Tire

    Our price: $87.99$139.88

    MSRP: $130.52 - $192.59 - You save up to $52.71 (27% off)

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    • "Customer service is priority #1 at Rocky Mountain ATV/MC. We value our customers and strive to be the best shopping experience- when you buy from us, you are buying lifetime service."

      -Dan Thomas, CEO and Founder

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    • Delivering crossover performance at a value price!
    • The perfect tire for all seasons.
    • Innovative "V" tread pattern bridges the gap between soft mud/snow/sand and hardpack surface
    • Unique over-center tread elements provide a smooth, controlled ride on hardpack, while offering excellent clean-out in soft conditions.
    • Specifically developed 6-ply radial carcass delivers the stability needed for UTV applications, while retaining the plush ride characteristics favored by ATV riders.
    • The STI Black Diamond XTR has a 6-ply rating with 1 1/8" tread depth.
    • DOT approved.

    STI Black Diamond XTR Radial ATV Tire Reviews

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    1 of 1 people found this review helpful.

    Great Tires

    Comments On Apr 24, 2016:I've had these tires on my quad for two seasons now and I can't be more happy with them! They rip through mud, sand, rocks and tackle hill climbs like nobody's business. Highly recommend!

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    0 of 1 people found this review helpful.

    Excellent tires

    Comments On Nov 16, 2015:Used these same tires on a 2011 Polaris Ranger RZR 800. Very good tires! Just ordered a set for the 2015 RZR 900 Trail.

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    2 of 2 people found this review helpful.


    Comments On Sep 30, 2015:purchased these to go on my scrambler 850. ordered them on a set of sti hd3 wheels. i went with 26x11x14 in the rear and 26x9x14 in the front. even with the same size tires the quad sits a little higher up and is a huge improvement from the terrible stock tires.

    Additional Comments On Oct 04, 2015:tires looked awesome and came quick but on the first ride they made it about 10 min before the side wall sliced in two places. I've never had a 6 ply tire rip so easily

    Additional Comments On Oct 12, 2015:now after two rides i have blown out another tire. riding with other people with the same quads and stock tires and not even on rocky trails. 2 tires in 2 rides and i have never blown a tire on these trails in my life. ill never buy these again.

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    0 of 1 people found this review helpful.

    confused about sizing

    Comments On Jul 02, 2015:The first thing is that my tires came in very fast. But when it came to selecting a tire, the more i read the more questions i had.I do not have any miles on these STI Black Diamond XTR tires ( 27x9x12 & 27x11x12) yet but they look good and i wanted to give everyone a idea on the sizing/weights.I had Bighorn 2.0 ( 26x9x12 & 26x11x12) with 500 miles on them and plugs in the sidewall. The tread depth on all 4 bighorns were 5/8".The tread depth on the STI are 1" not the 1 1/8" as stated. All 8 tires had 10 PSI in them for these measurements. The rear tires are the excat same diameter even with the tread depth difference. The front STI is 1/4" taller on total diameter. Also both of rear wheels weighed 39 lbs.The front STI was 36lbs and the 2.0 30lbs. The 2.0's with a steel wheels and the STI with a aftermarket aluminum. I guess this means these 27" STI's are actaually smaller than the 26" 2.0's not counting tread depth? Glad i went with 27's. Hope this helps someone.

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    1 of 1 people found this review helpful.

    Lacks control in hard turning.

    Comments On May 20, 2015:Doesn't hold up around cactus, even with Ride-On or Slime. Good traction in all conditions, but the softness of the tire is the weakness when turning.

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    1 of 1 people found this review helpful.

    Love these tires

    Comments On Mar 08, 2015:Very good tires do very well in the mud snow and rocky terrain here in wv everyone here likes the big horn maxxis but i would recomend the black diamonds over the big horn any day

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    0 of 1 people found this review helpful.

    Best tires I have ever owned

    Comments On Feb 27, 2015:I had these on. Kingquad on 26x12 and they run small measure 25.5 without a pouch. On my RZR 27x14's they measure true it size and are nearly as tall as mega mayhem 28's. Love these tires ride amazing and get you out of anything. True all around. Rock, snow, mud hardback tire.

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    0 of 0 people found this review helpful.

    good tire

    Comments On Nov 20, 2014:very aggressive tire works great in all conditions

    Additional Comments On Jan 06, 2015:this is a good tire but very slippery on snow and ice

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    0 of 0 people found this review helpful.

    black Diamond tires

    Comments On Dec 29, 2014:Needed more aggressive and taller tires for our trip to moab...these did the trick. After we got back 3 of my utv friends bought the same tires from rocky Mountain atv... great at tires.

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    0 of 0 people found this review helpful.

    Very grippy

    Comments On Dec 29, 2014:Took these bad boys out on hard dirt, mud, and sand. Extremly happy with how they performed. Clears mud out quickly, and grips like there is no tomorrow. Very happy with them.

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