Challenge of the Americas Offers ‘Crazy Andy’ Sale for CalSpeed

ROK GP and Mini ROK engine and entry deals for second event of series

The ROK Cup USA Challenge of the Americas opened up the 2020 season in Tucson, Arizona at the Musselman Honda Circuit on January 24-26. A total of 107 entries competed in the 10 categories, featuring a staggering 35 shifterkart entries. Numbers are expected to increase across the board for the second event of the series, set for February 21-23 at CalSpeed Karting in Fontana, California. The 2019 edition saw a record high of entries under the ROK Cup USA banner.

Factors surrounding the entry total in certain categories were the graduation of Cadet drivers to Junior, and Junior drivers moving to the Shifter Senior ROK category. To help fill the gap of the graduating drivers, Challenge promoter Andy Seesemann is providing a combination sale for the ROK GP and Mini ROK engines. Continue reading


ROK Cup International Final tickets on the line in three-event championship chase on west coast

ORANGE, CA (January 16, 2019) – In three weeks time, the Challenge of the Americas will be welcoming competitors from around North America as the 12th season begins for the premier winter series on the left coast. The 2019 season for the Challenge starts on February 8-10 at the CalSpeed Karting Center in Fontana, California. The nine categories competing, based on the ROK Cup USA platform – will be kick starting the championship chase that, for those drivers able to win or stand on the coveted COTA podium, will be on their way toward reaching the title and tickets to the ROK Cup International Final in Lonato, Italy. Continue reading


It has come to our attention that when servicing the Vortex ROK Shifter for regular maintenance, the piston ring clearance (Ring Gap) is not being set to factory specification. This is a very important procedure that is required by the piston manufacturer. Each piston box includes information containing minimum clearance guidelines (see picture); these guidelines must be followed to achieve the original high quality when sent from the factory.

Please make sure if you are having someone service your engines, they are fully aware of this procedure. Continue reading


ORANGE, CA (January 2, 2018) – The 2018 season is just around the corner and the new era for the Challenge of the Americas. With this comes a new prize package for its champions.

Rok Micro, Rok Mini, Rok Junior, Rok Senior, Rok Masters, Rok Shifter Senior, and Rok Shifter Masters Champions all earn a ticket to the Rok International Final in Lonato, Italy, October 10-13, 2018. As there is no Micro class at the Rok International Finals, the Rok Micro Champion will earn a ticket to participate in the Rok Mini category, (provided that the driver at least the minimum age of 9 for the class). All prize winners must be eligible to race the appropriate class at the event based on the rules of the event and the CIK.

1st place in all Rok Championships include: Usage of new chassis (OTK) and new engine, entry fee, one set of practice tires, race tires, fuel/oil and pit space at the event.  

2nd place in all Rok Championships will earn a ticket to compete at the Rok the Rio event Nov. 1-4, 2018 in Las Vegas, NV.

3rd place in all Rok Championships will earn an entry for the Challenge of the Americas 2019 season opener.   
“We have offered trips to compete at the World Finals since the inception of the Challenge of the Americas”, stated series owner Andy Seesemann. “This change to Rok gives us this same     opportunity. The chance to race at a true World Championship is a great honor and a fantastic achievement.” Continue reading


Rok engines available for single event or entire 2018 schedule for premier winter series on left coast

ORANGE, CA (December 13, 2017) – The 2018 season is just around the corner and the new era for the Challenge of the Americas will begin in six weeks. The series will make the move to the ROK by Vortex engine platform and Bridgestone tire line when the popular winter program fires up once again on the final weekend in January. Over the last nine months, Rok Cup Promotions and Challenge promoter Andy Seesemann have helped to put over 600 Rok engines into the hands of the racers throughout North America, which will provide a strong foundation for the program moving into the future. Solid local programs and support for the Rok engine in Northern California, Southern California and the Rocky Mountain region have set the groundwork for a bright future. Entries for the 2018 have been coming in steadily since registration was opened on December 4, and there is now another reason for racers to be part of the Challenge in 2018. Continue reading