Karting 50mm x 1030mm Aftermarket Tony/OTK (Key Type) Axles
Karting 50mm x 1030mm Aftermarket Tony/OTK (Key Type) Axles
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🛞 50mm Ultra Soft Axle – CAD-Designed, CNC-Machined, Made in the USA 🇺🇸
The 50mm Ultra Soft Axle from Zero Error Racing is the powerhouse of your kart’s rear end. Precision CAD-designed, CNC-machined, and proudly made in the USA, this axle delivers the flex and finesse needed to dominate on low-grip tracks with heavier setups.
⚙️ Key Specs:
- Diameter: 50mm – ideal for enhanced stability and weight transfer
- Wall Thickness: 2mm – tuned for maximum flex without compromising strength
- Material: Aircraft-grade steel alloy
- Flex Rating: Ultra Soft (VS) – engineered for high rear grip and chassis movement
💡 Why Choose Zero Error:
- American Craftsmanship – built with pride and precision in the USA
- Race Proven – trusted by top-tier drivers in karting and Jr. Dragster circuits
- Consistent Quality – CAD and CNC technology ensures repeatable performance
🏁 Track Condition Guide – Axle Selection Made Simple
|
Track Condition |
Surface Grip |
Recommended Axle |
Driver Type |
Handling Goal |
|---|---|---|---|---|
|
Wet / Rainy |
Very Low |
Ultra Soft (VS) |
Light / Medium |
Max rear grip, easy rotation |
|
Cold & Dusty |
Low |
Ultra Soft (VS) |
Light / Medium |
Flex for tire bite |
|
Morning Practice |
Low-Medium |
Very Soft (S) |
Medium / Heavy |
Balanced grip, adaptable flex |
|
Midday Rubbered Track |
Medium |
Soft (S) |
Medium / Heavy |
Stability with slight flex |
|
Hot & Sticky |
High |
Medium / Hard |
Heavy |
Free up rear, reduce overgrip |
|
Race Day (Rubbered In) |
High |
Soft (S) |
Medium / Heavy |
Controlled flex, consistent grip |
💡 Tip: Start with a neutral axle during practice and adjust based on tire feedback and lap times.
🧰 Race-Ready Spec Sheet – Build Your Winning Setup
|
Component |
Spec / Recommendation |
Notes |
|---|---|---|
|
Axle |
50mm Ultra Soft (VS) |
Zero Error Racing, CNC-machined |
|
Lock Collar |
50mm 2-Piece Aluminum Clamp Collar |
8mm keyway, Zero Error or PKT |
|
Bearings |
High-speed sealed bearings |
Labyrinth seal preferred for durability |
|
Hubs |
Lightweight aluminum 50mm rear hubs |
Match bolt pattern to axle and brake setup |
|
Brake Carrier |
Zero Error anodized brake hub |
Clear or black finish |
|
Tires |
MG Red or Vega Blue (based on track grip) |
Softer compounds pair well with VS axles |
|
Driver Weight Range |
< 120 lbs |
Ideal for maximizing flex and grip |
Let me know if you'd like to build out the full 50mm axle lineup with Very Soft and Soft variants, or format this for print, web, or event display. I can even help you create a matching flyer or catalog page.
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