Corona, CA (1/14/2015) - For the 2015 race season, STI Tire & Wheel announces its title sponsorship of the STI QuadX & UTV Racing Series, as well as the expansion of the series allowing UTV racing competition. 

The five-race series kicks off January 25 at the famous Glen Helen Raceway in Southern California. A combined $3,000 prize purse plus 100-percent Pro payback is allocated for ATV Pro and UTV Pro competitors. Additional prizes are available for holeshot winners and a range of racing categories. Amateur classes include several youth divisions, plus racing classes for Women, Seniors, modified machines, production machines, two-strokes and more. 

2015 STI Quad X Racing Series Schedule
Date	Round	Location
January 25	1	Glen Helen Raceway - San Bernardino, CA
March 21	2	Glen Helen Raceway - San Bernardino, CA
May 2	3	Glen Helen Raceway - San Bernardino, CA
June 27	4	Glen Helen Raceway - San Bernardino, CA
July 25	5	Glen Helen Raceway - San Bernardino, CA

The STI QuadX & UTV Racing Series is presented by Yamaha. Media sponsors include Dirt Wheels and ATV/UTV Action magazines. The following companies are also providing sponsorship support: H&M Motorsports, GYTR, DR.D, Vertex Pistons, Hot Cams, MTA Distributing, Big Kid Racing, AC Racing, Hot Rods, IMS Products, Scott, Triumph Motorsports, Cometic Gasket, Cylinder Works, Hinson Racing, South Point Hotel, CV4, Millenium Technologies, FMF, Works Connection, and Pivot Works. Additional sponsorship opportunities are still available. 

Check www.quadxseries.com and www.glenhelen.com for more information.