SuperNats XXVIII

TBA

2026 Winter Series

TBA

2025 Pro Tour

3DAYS

SKUSA Mexico

10DAYS

2025 PKC

18DAYS

2025 TSRS

66DAYS

Next ProKart Challenge Event


PRE-ENTRY OPEN NOW

Will close April 8 at 11:59 PM PDT

Round 3 - SPRING MOUNTAIN KARTING April 12-13, 2025
Spring Mountain Karting
4767 S Highway 160
Pahrump, NV 89048
(702) 302-9462
springmountainkarting.com
Google Maps
 

California ProKart Challenge

2025 ProKart Challenge Classes
  • Spec Fuel/Oil for all classes:  Sunoco 112 Supreme / Elf HTX909
  • Push back bumper will not be required for any classes of the 2025 Pro Kart Challenge.
  • (1) Set of 2025 PKC Stamped Evinco Race Tires per round allowed. Sticker tires are recommended for each round, but not required (used tires ok if they have 2025 PKC stamp).
  • Due to the lack of participation over the past several years, we will no longer being offering any X30 classes.

IAME SWIFT CLASSES

Micro Swift
sponsored by Sanner Racing
Engine: IAME Mini Swift 60 + 16mm factory header
Age: 7-10
Weight: 220 lbs
Tires: Evinco Blue 'SK-H2' from SKUSA
Additional Equipment: Neck brace & SFI-approved chestprotector required
Kart # 200-299
Mini Swift
sponsored by HRT Driver Development
Engine: IAME Mini Swift 60
Age: 9-13
Weight: 245 lbs
Tires: Evinco Blue 'SK-H2' from SKUSA
Additional Equipment: Neck brace required; SFI-approved chest protector required for drivers 12 & under
Kart # 100-199
 

IAME KA100 Classes

KA100 Junior
sponsored by SuperSpeed Bearings
Engine: IAME KA100 + 22mm factory header
Age: 12-15
Weight: 320 lbs
Tires: Evinco Blue 'SK-H2' from SKUSA
Additional Equipment: Neck brace required; SFI-approved chest protector required for drivers 12 & under
Kart # 800-899
KA100 Senior
sponsored by Formula Works
Engine: IAME KA100
Age: 15+
Weight: 355 lbs
Tires: Evinco Blue 'SK-H2' from SKUSA
Kart # 900-999


 
KA100 Master
sponsored by Mike Manning Karting
Engine: IAME KA100
Age: 30+
21-29 (200 lb racing weight of driver)
Weight: 390 lbs // 400 lbs (21+)
Tires: Evinco Blue 'SK-H2' from SKUSA
Kart # 400-499
 

SSE/KZ CLASSES

Pro Shifter
sponsored by Precision Works Racing Engines
Engine: SSE/KZ
Age: 15+
Weight: 390 lbs
Tires: Evinco Red 'SK-M2' from SKUSA
Kart # 1-99
Master Shifter
sponsored by Mega Power Engines
Engine: SSE/KZ
Age: 30+
Weight: 405 lbs
Tires: Evinco Red 'SK-M2' from SKUSA
Kart # 600-699
 

LOCAL OPTIONS CLASSES

  • *Spec Honda and Rok Shifters can race in the FZ125 Spec Shifter class using Evinco Blues at 390lbs.  Once we have a better picture of the Honda/RoK landscape, we can make any necessary adjustments.
  • We've officially created an FZ125 Master class. If you raced at K1 in Masters we have created a matching 400 number reservation for you. If you want to run a different 400 number, please contact This e-mail address is being protected from spambots. You need JavaScript enabled to view it . See the classes page on our website for complete details.
Mini Shifter
sponsored by Precision Karting
Engine: FZ65
Age: 9-13
Weight: 255 lbs
Tires: Evinco Blue 'SK-H2' from SKUSA
Additional Equipment: Neck brace required; SFI-approved chest protector required for drivers 12 & under
Kart # 700-799
Junior Shifter
sponsored by Nash Motorsportz
Engine: FZ85
Age: 12-15
Weight: 340 lbs
Tires: Evinco Blue 'SK-H2' from SKUSA
Additional Equipment: Neck brace required; SFI-approved chest protector required for drivers 12 & under
Kart # 500-599
FZ125 Spec Shifter
sponsored by P1 Engines Inc
Engine: FZ125
Spec Honda/RoK Shifter
(See note above)
Age: 15+
Weight: 390 lbs
Tires: Evinco Blue 'SK-H2' from SKUSA
Kart # 300-399
FZ125 Master Shifter
sponsored by P1 Engines Inc
Engine: FZ125
Spec Honda/RoK Shifter
(See note above)
Age: 30+
Weight: 405 lbs
Tires: Evinco Blue 'SK-H2' from SKUSA
Kart # 400-499
 
We reserve the right to make additional modifications to our rules as experience dictates.