Yamaha’s new 2012 Grizzly 300 has a lot going for it, with many modern features, an easy-to-ride personality and most notably an affordable price tag. STI Tire & Wheel is now making this new 2-wheel-drive utility ATV even more attractive with a new tire/wheel kit.

STI has conveniently pre-mounted Black Diamond ATR tires (23x8R-12 in front, 23x10R-12 in back) to a set of 12×7 HD2 alloy wheels. This combination—ready to bolt on and go—provides much more performance and style to the Grizzly 300. OEM dimensions are only 22-inch tires on 10-inch wheels.

The cross-terrain radial Black Diamonds are significantly more aggressive than the stock tires and work great in all conditions, plus they are one inch taller than stock, which increases ground clearance. And STI’s two-inch-larger HD2 wheels are obviously a major upgrade from the Grizzly’s stock black steel wheels in both style and durability—they look great, plus they’re covered by a lifetime structural warranty.

Grizzly 300 owners looking for an easy and effective way to customize their new ride need look no further than STI.

STI Grizzly 300 kits are available at finer ATV/UTV dealers everywhere, through MTA Distributing. For more information, to place an order or to locate an STI dealer, visit www.stitireandwheel.com or call: East (318) 255-0049; West (951) 272-0971.

STI Tire & Wheel has now released its new tire the Black Diamond. This super-versatile new ATV/UTV tire is designed to deliver crossover performance—an ideal choice for all terrain types and all seasons—at a value price.

The Black Diamond’s innovative “V” tread pattern bridges the gap between soft mud/snow/sand and hardpack surface capabilities. Its unique over-center tread elements provide a smooth, controlled ride on hardpack, while offering excellent traction and clean-out in soft conditions. The Black Diamond’s 6-ply radial carcass was developed specifically to provide the stability needed for side-by-side UTV applications, while retaining the plush ride characteristics favored by ATV riders. An extended-wear tread compound retains biting edges longer and greatly increases tire life.


The Black Diamond is now available in two models and more than 30 sizes. The Black Diamond ATR features a ¾-inch tread lug, while the Black Diamond XTR utilizes a more aggressive 1 1/8-inch lug depth.

The ATR model’s sizes are: 22x11R-9, 25x12R-9, 22x11R-10, 22x8R-10, 23x10R-10, 23x8R-10, 24x11R-10, 25x11R-10, 23x8R-11, 24x10R-11, 24x8R-11, 24x9R-11, 25x10R-11, 25x8R-11, 23x10R-12, 23x8R-12, 24x8R-12, 25x8R-12, and 25x10R-12.

The XTR model’s sizes are 25x8R-12, 25x10R-12, 26x10R-12, 26x12R-12, 27x9R-12, 27x11R-12, 26x9R-14, 26x11R-14, 27x9R-14, 27x11R-14, 26x9R-15 and 26x11R-15 (26x9R-12 and 26x11R-12 sizes are coming soon).

STI Black Diamond tires are available at finer ATV/UTV dealers everywhere, through MTA Distributing. For more information, to place an order or to locate an STI dealer, visit www.mtadistributing.com or call: East (318) 255-0049; West (951) 272-0971.