CKT CLASS STRUCTURE: Overview

The Colorado Karting Tour is a regional racing series for competitive, high-performance go kart racing in the state of Colorado. The sport of karting has traditionally separated racing classes on the basis of two primary factors:

  • Age of the driver
  • Minimum weight (of kart and driver together)

Together, these two factors have driven karting class structure for nearly 6 decades.

Thanks to the dedicated work of renown sanctioning bodies such as the FIA, the International Karting Federation, and SKUSA, the class structure present today with CKT has been tailored to provide a progressive, safe, and reasonable progression for kart racers from the age of 5 and upward.

At The Colorado Karting Tour, we do our best to provide a racing class for all ages, experience level, and racing budget. Below is our 2020 list of racing classes, with a place for anyone age 5 and up to race.

*Note: ‘LBS’ denotes the minimum weight that the kart and driver must weigh upon exiting the racetrack after each racing event (driver, kart, and all safety equipment are weighed together).

Questions about a racing class? Contact us to learn details about any class listed.

2020 Colorado Karting Tour Approved Categories. Includes info on each category, age ranges allowed, engine platform utilized, primary rule set governing the category, minimum weight, tire compound, tire size, and fuel / oil required.
Category AgesEngineRule set
Min. Weight (lbs.)
Tire CompoundTire Size(s)Fuel / Oil
Kid Kart5-8Honda GXH50IKF150*(1 set)*
Evinco Blue
4.5 x 10-5 VP MS 93 / 10w30 Synthetic
Junior 17-13Briggs 206
(Blue Slide)
IKF 240Evinco Blue
4.5x10-5VP MS93/ 4T
Junior 212-16Briggs 206
(Black Slide)
IKF 310Evinco Blue
4.5 x 10-5 Front
6.0 x 11-5 Rear
VP MS93/ 4T
Micro Max7-11Rotax FR125 Rotax 2020235Evinco Blue4.5 x 10-5VP MS 93 / XPS
Mini Max 10-13Rotax FR125 Rotax265Evinco Blue
4.5 x 10-5VP MS 93 / XPS
Junior Rotax12-16Rotax FR125Rotax320Evinco Blue
4.5 x 10-5 Front
7.1 x 11-5 Rear
VP MS 93 / XPS
Senior Rotax15+Rotax FR-125Rotax
364Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
VP MS 93 / XPS
Masters Rotax32+Rotax FR-125Rotax
395Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
VP MS 93 / XPS
Open Tag15+125cc 2-Cycle
or 250cc 4-Stroke
IKF365Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
Unaltered Race Fuel / 2-Stroke Oil
100 Senior15+IAME KA 100 SKUSA365Evinco Blue
4.5 x 10-5 Front
6.0 x 11-5 Rear
VP C-12 / Motul KGP 2T
100 Senior15+ROK VLR 100ROK CUP USA365Evinco Blue4.5 x 10-5 Front
6.0 x 11-5 Rear
VP C-12 / Motul KGP 2T
Shifter 15+CR125 (Stock Moto)SKUSA385Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
VP C-12 / Motul KGP 2T
Shifter15+CR125 (Mod)IKF395Evinco Red4.5 x 10-5 Front
7.1 x 11-5 Rear
VP C-12 / Motul KGP 2T
Shifter15+ROK ShifterROK395Evinco Red4.5 x 10-5 Front
7.1 x 11-5 Rear
VP C-12 / Motul KGP 2T
Shifter15+IAME 175cc / KZ SKUSA 405Evinco Red
4.5 x 10-5 Front
7.1 x 11-5 Rear
VP C-12 / Motul KGP 2T
206 Light15+Briggs 206
(Black Slide)
IKF 345Duro HF242
4.5 x 10-5 Front
7.1 x 11-5 Rear
Shell V91 / 4T
206 Heavy15+Briggs 206
(Black Slide)
IKF385Duro HF242
4.5 x 10-5 Front
7.1 x 11-5 Rear
Shell V91 / 4T
206 Masters40+Briggs 206
(Black Slide)
IKF385Duro HF2424.5 x 10-5 Front
7.1 x 11-5 Rear
Shell V91 / 4T