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STI Tire & Wheel


Garrin Fuller (45) and Levi Shirley (81) put STI tires and wheels through the paces.
Garrin Fuller (45) and Levi Shirley (81) put STI tires and wheels through the paces.
Duncan Racing has been a big part of ATV racing since before most current ATV racers were born (1977, in fact). And this team has won more races and championships than any other  — by a wide margin. That’s why, when a celebrated company like this, decides to include your product in it’s professional race program you can’t help but generate a press release.

STI Tire & Wheel is pumped to announce that it has become the official tire and wheel supplier of Duncan Racing throughout the 2013 season.

Duncan Racing — based in Santee, California (near San Diego) — will be focusing primarily on the west coast WORCS and Yamaha/STI Quad-X schedules, and may also make selected appearances at the east coast ATVA National MX Series events. The team has chosen STI Tech 4 XC tires front and rear for WORCS and Tech 4 MXs for Quad-X, all mounted on STI Pro-Lite Alloy and/or Pro-Lite Beadlock wheels.

Key riders to watch are Garrin Fuller and Levi Shirley. Fuller captured three class championships in 2012 WORCS racing (Pro-Am, Open A and Production A), and will be a rookie Pro in this series in 2013. Rising talent Shirley is concentrating on Pro-Am in 2013. Both rode STI tires last season.

An alliance like this is always highly beneficial to current and future product development. STI Tech 4 MX tires are already known for their light weight, excellent grip, responsive handling, confidence-inspiring durability and reasonable pricing. This all-around performance and value will only get better with feedback from a team like Duncan Racing. The same can be said for strong and light STI spun aluminum Pro-Lite wheels, featuring heavy-duty .170 wall construction.

We’re happy to be a part of this famous racing effort and look forward to seeing what the STI/Duncan Racing association will produce in the near and distant future.

For more information on Duncan Racing, visit

Photos by Pat Carrigan,


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