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STI Black Diamond XTR Radial ATV Tire
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STI Black Diamond XTR Radial ATV Tire 25x10-12

Part# 1333160002

Our price: $99.97

MSRP: $144.81 - You save $44.84 (31% off)

View Product DetailsSee stock sizes for your machine (Machine Specs)

5+ In-Stock

  • "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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Special Notes:

  • Please note: Tire sizes vary by machine please check your current tire and wheel size before ordering.
  • 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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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

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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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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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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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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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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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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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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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Very Nice

Comments On Dec 18, 2014:Tires are great...the service, shipping, delivery from rocky mtn. ROCKS!!!

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Hefty and beefy tire! Good buy for the money.

Comments On Dec 17, 2014:Purchased these from, had them mounted on original aluminum rims on my Suzuki KQ500. What a difference nice radials does to your ride, does extremely well in snow when plowing. Rides better when air pressure is lowered to 2.5-3# on the KQ so the sidewall will "pudge" a little, a tip I got from Doug Meyer from ATVTV.COM's video. I have 1000 miles on mine, and the rubber lugs are only showing slight rounding of the edges, these will last for thousands of miles on gravel and rocks. The only thing I would "complain: about, is wobble on the tires at high speed, I cannot for the life of me get local tire installers to force balance these! I am sure that would cure most wobbling problems.

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