Precision 0.5 Sprockets | The Behind the Scenes...

When every tenth matters, karting teams demand absolute precision. That’s why we developed the Precision 0.5 Sprocket. A game changing rear sprocket that allows for half-tooth gear ratio adjustments without sacrificing reliability or performance.

This blog dives deep into the technology, engineering, and advantages of the 0.5 sprockets and why they’re already making a big impact on track.

In karting, finding lap time often comes down to the smallest margins. Gear ratio selection is one of the most critical elements of tuning, and until now, teams have only been able to adjust in full-tooth increments. The Precision 0.5 Sprocket changes that, allowing half-tooth adjustments that provide a new level of fine control over your final drive setup without compromising reliability or performance.

So how does it work? The question we have received over 200 times by now…

So here is the blog that answers all of your questions. 

The sprocket is determined by circumference and not by the “half tooth”, when you design a 0.5 sprocket you can’t shrink the tooth nor can you have a half of a tooth so you are limited with what you can do to make sure its compatible with the current 219H Karting Chains on the Market. The Solution? Shrink the circumference of the sprocket between two whole sizes in a sequence e.g 72/73 for a 72.5. However if you only shrunk the circumference you would change the pitch of the sprocket tooth therefore would require a custom chain to fit the new pitch. This is why we have engineered the sprocket by laying the tooth profile back mathematically to be able to fit the current chains on the market. Leaving us with Zero Chain slip on the sprocket.

So does it have a half tooth? Nope a 79.5 Tooth Sprocket has 80 Teeth but we lay those 80 teeth back on a smaller sprocket circumference at an angle to have compatibility with the chains.

The Sprocket is made 100% by CNC as it can not be manufactured the traditional way due to the curvature and layout of the Sprocket CAD.

One benefit of using these sprockets is that if you are testing or racing and you need to go to a lower or high gear ratio but with more Precision. Typically you would have to change the Front Drum and Also the Rear Sprocket to achieve a 0.5/0.7 Increase having Zero Precision with your adjustment for example a typical change would be a Front Drum Change for a Minor Adjustment which is time consuming and can sometimes not be precise. 80/12 (6.66) Ratio
-> 81/12 (6.75GR) or 74/11 (6.72GR) but with the 0.5 Precision Sprocket you can achieve the middle of 80 & 81 with just one change! 80.5/12 (6.71GR)

Some might wonder why not just change the front sprocket instead. While changing the front can alter the ratio, it’s a much heavier adjustment. It also alters chain tension dramatically, loads the engine sprocket bearing more heavily, and requires more mechanical work. By keeping the front sprocket fixed and using the 0.5 sprockets on the rear, you maintain the engine’s natural torque characteristics, protect the drivetrain, and make fast, subtle changes that deliver results without major disruption to the kart’s setup.

The 0.5 sprockets also help protect the mechanical integrity of the kart. Front sprocket changes often increase chain angles and tension, leading to additional wear on chains, engine sprocket bearings, and even rear axle bearings. With Precision 0.5 Sprockets, you avoid this completely. Chain tension remains stable, alignment stays perfect, and power delivery feels smoother. That not only improves reliability across race weekends but also provides more consistent lap times and better driver feedback.

To create the 0.5 sprockets, we went through a rigorous development process. First, we researched the full range of standard sprockets and mapped out all available gearing options for 219 chain pitch systems. From there, we worked closely with our engineer (Max Hanford) to design the perfect half-tooth increments using CAD modeling. The key was to maintain perfect chain pitch engagement while allowing the teeth to “lay back” just enough to create the half step, without introducing slippage or chain binding.

Material selection was equally important. We chose high-grade aerospace aluminum to ensure a lightweight but extremely strong sprocket capable of handling the loads and stresses of competitive karting. After prototyping, we moved into track testing, working alongside some of the biggest karting teams in X30 & OK classes. These teams pushed the prototypes to the limit across different conditions, tracks, and engine packages.

The results were outstanding. Teams consistently reported smoother engine RPM control, better throttle response, higher corner exit speeds, and improved lap time consistency. Importantly, chain reliability remained excellent, with no slippage or premature wear seen during aggressive testing programs. The 0.5 sprockets didn’t just meet expectations, they exceeded them.

Now, after months of research, engineering, and track validation, the Precision 0.5 Sprockets are publicly available. They offer karting teams and drivers a unique advantage, the ability to fine-tune their setups with surgical accuracy while maintaining the reliability and strength required to win at the highest levels