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STI Black Diamond Radial ATR Tire
STI Black Diamond Radial ATR Tire

$69.99 - $109.99
15% Off - Save up to $19.00

See the OEM Sizes for your ATV
Description See Also: 11 Reviews 6 Questions Fitment Part Numbers
Item #SSI0002

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11 Reviews
4.9 out of 5 stars
5 Star   10 4 Star   1 3 Star   0 2 Star   0 1 Star   0
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All Reviews
Verified Purchaser
Reno Nevada
Durability5/5Ease of Installation5/5Performance5/5Style5/5
Great tires!

I like the Black Diamonds so much Im putting them on another quad. They are great o n rock, dirt and if you drop pressure to 3-4 lbs, work almost as well as paddles on drifting sand.

Verified Purchaser
Cave Junction, OR 97523, USA
Durability5/5Ease of Installation5/5Performance5/5Style5/5
Awesome Any Terrain Tires

First Radial ATV tires I ever owned. I am not your average rider as my ATV is also my Off Road Wheelchair. I was a Wildland Firefighter until I got injured. before my injuries I loved to hike but now I can't walk so needless to say I ride my ATV in very remote areas and I require a Great Tire that can handle from Mud to Pavement and everything inbetween. At first I ran them at 2 to 2.5 psi but they proved squiggly and clunky in the ride so I did 3 psi then 4 psi but after some trails mud rocks and pavement I have come to find 5 psi works the best for me. I have rode about 250 miles on them so far on some very rough and nasty rocky to mud bog trails, done some serious rock crawling and about 25 miles on the pavement and not a nick or cut one so I am very impressed with the STI Black Diamonds.

Verified Purchaser
Durability5/5Ease of Installation4/5Performance4/5Style4/5
Good product ,,,great service

Good sturdy tires ships fast. And great customer service thru take cRe if their customers

Verified Purchaser
Bandera, TX 78003, USA
Durability5/5Ease of Installation5/5Performance5/5Style5/5
Diamonds in the rough

I purchased two full sets of tires for my Honda Ranchers. The tires were mounted easily and look great. My son in law and I took the units out for a test drive in the Texas Hill Country. We treked through heavy brush, extremely loose river rock, and rock hopped a few hundred yards. The tires performed great and gripped when it mattered most. I highly recommend Black Diamonds.

Verified Purchaser
Durability5/5Ease of Installation5/5Performance5/5Style5/5
Great tires

Recently installed a set on my 2015 Polaris Ranger. Ride is smooth on hard pack and tires handle the mud with ease. Even surprised with how quiet the ride is. I would recommend these tires to everyone.

Verified Purchaser
Durability4/5Ease of Installation4/5Performance5/5Style5/5


Verified Purchaser
Kansas City
Ease of Installation5/5Style5/5
Nice Tires

I don't know about the durability yet but they appear to be well made and look as advertised.

Verified Purchaser
hayden, Idaho
Durability5/5Ease of Installation5/5Performance5/5Style5/5
Motorsport tires for ATV

Can't say enough good things about the tires or the service. When I talked to Jake after we had problems with one of the tires; he couldn't have been more helpful and he promised a replacement tire as soon as he could get one in stock and it didn't take long. It came today and I was totally shocked that it got her so fast. I am totally pleased with your company and especially kudos to Jake. Thank you
Al Koenig

Verified Purchaser
Best ATV tires on the market

For the money these radials are the best for off road as well as on pavement riding I have found. You just do not have any problems with them.

Verified Purchaser
Idaho, USA
Durability5/5Ease of Installation5/5Performance5/5Style5/5
Best tire buy I have ever made.

I am so glad that I bought these tires because they really grip well and ride smooth on hard pack and being 6 ply the will hold up to the rocky terrain that we have here. Put these tires on the front of my 2002 Polaris 500 H.O. 4x4 and plan on getting a set for the back, can't beat Motosport's prices and free shipping.

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6 Questions
Answered:   6
Not Yet:   0
Q: I have a 1987 Yamaha BW350.  Rear OEM Tire is 23x11x9.  Front is Larger.  I have a Road Title for this Bike and Ride Roads Often.  Found a Radial for Front. Want One for Rear.  Will the 22x11x9 Work for Me??
2 months 16 days ago
Top 25
2 months 16 days ago
A: Yes that size will work, it will be one inch shorter than stock.
Q: Can you put them up front on a two wheel drive
1 year 4 months ago
Top 10 Contributor
1 year 4 months ago
A: Yes you can.
Q: Am I purschasing just one tire?
Over 3 years ago
Expert MotoSport Staff
Over 3 years ago
A: the STI Black Diamond Radial ATR Tire is sold individually.
Q: How is this tire in light to medium mudding
Over 4 years ago
i have a 1998 big bear 350 4x4 and I'm going to get stock size of theese tires but I also was wandering about how this tire would affect power loss since it is a heavier tire than the little do pops that I have on it now thanks:)
Expert MotoSport Staff
Over 4 years ago
A: The STI Black Diamond Radial ATR is a great all around tire and does well in soft mud, snow, sand and hardpack. Feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
Q: How much air pressure?
Over 4 years ago
I've heard that for a comforable ride 2lb - 2.5lb of air is the most you want to use because of how stiff the tire is. Is this correct?
Top 500 Verified Purchaser
Over 4 years ago
A: STI recommends starting at 7 lbs and dropping from there. They don't recommend going below 5 psi as your sidewall is not protected
MotoSport Staff
Over 4 years ago
A: It's hard to say. 2lbs of pressure is really low. I would recommend starting at the pressure your manual recommends, then dropping air pressure in .5lb increments until you get to where you feel comfortable.
Q: The STI Black Diamond ATR 25x10x12(R) and 25x8x12(F). Shouldn't these tires be approx 25" dia? Tire spec chart says 22.2". ???
Over 5 years ago
Over 5 years ago
A: match the tire you have on the machine if 25's then buy 25's.
STI Black Diamond ATR
Expert MotoSport Staff
Over 5 years ago
A: I'm not sure which tire spec chart you are refering to but According to STI's tire spec chart on this tire, both the 25x8-12 and 25x10-12 tires would be 25 inches in diameter.


See all bikes that this part fits...

See Fitments
# Part Numbers
Product Variant Manufacturer Part #
22x11-9 STBD0921
23x10-10 N/A
23x10-12 N/A
23x8-10 STBD1038
23x8-11 N/A
23x8-12 STBD1238
24x8-12 N/A
24x9-11 STBD1149
25x10-12 N/A
25x8-12 N/A