Raceseng Circuit Sphere 150 - M12x1.25mm

The Circuit Sphere 150 fuses function, form and style together to create an unparalleled, performance enhancing and confidence inspiring shift knob.

The ergonomically designed and textured sphere grip was designed for overhand shifting. The sphere grip features a flattened top that nestles into the palm of your hand and allows your fingers to wrap over the sphere for a firm shifting grip.

The stainless steel handle is appropriately weighted to remain delicate on your shifter linkage assembly and to prevent the numb feeling commonly found when the weight is set too high in the grip.

The 150mm height reduces your hand’s travel distance and time between shifts while increasing your mechanical leverage and reducing the effort required for each shift throw. The shift knob was designed to reduce fatigue during repetitive lateral arm and shoulder movement between the steering wheel and shift knob.



The birth of Raceseng dates back to 2005 when a father and son were inspired to merge their combined design, engineering and manufacturing skills with their passion for racing. With a legacy of racing history dating back to 1957, the driving goal was to create a company that embodied their passion and knowledge to completely design, develop and manufacture a line of high performance automotive products. Ever since then, we have set out on a journey being well aware that its going to take many years of hard work to build out our vision!


The Circuit Sphere spawned from the idea of creating a functional, well designed and aesthetically pleasing shift knob intended for competition driving on the track or street. The marketplace is littered with competition shift knobs which lack engineering, testing and refinement to provide the best option to enthusiasts. We knew we could provide what the real competition driver is looking for so we set out to create a competition shift knob that delivers unparalleled performance and features compared to anything else on the market.



Besides the steering wheel, the shift knob is the most driver interactive interior accessory but can have the least amount of integrated design. The Circuit Sphere flips that script and features a grip that has pure functionality integrated with visually stunning design language. The delrin grip has a sphere profile with a flattened top that allows your fingers to wrap over the sphere for a confident grip. The bead blasted texture enhances the grip, all while remaining cool to the touch. We designed an intentional tangent line around the grip which provides a subtle contour to unite your hand to the grip faster and easier. The final touch is a contrast cut Raceseng icon which visually pops against the satin finish of the delrin grip.



The 150mm height increases your mechanical leverage and reduces the effort required to make those quick shifts while on track or the street.



By decreasing the distance between the steering wheel and shift knob, you can to keep your hands on the wheel more and reduce the time spent locating the shift knob.

Each car has a different height relationship between the center console and the steering wheel. We suggest keeping the top of the shift knob between the steering wheel’s 4 or 5 o’clock position.




Machined from 303 stainless steel for its high weight ratio and brush finished by hand, the handle is the solid foundation of the shift knob.


We utilize advanced manufacturing techniques to create an ergonomic and visually stunning sphere from black delrin which has been bead blasted for a textured surface and remains cool to the touch.


The satin anodized and laser engraved billet aluminum ring is the finishing touch and a mark of Raceseng’s design and quality.



  • COLLECTION | Circuit Series
  • PROFILE | Tall Sphere Profile
  • OPTIONS | Black, Blue and Red Rings
  • FINISH | Brush Finished Handle, Satin Anodized Ring and Bead Blasted Grip
  • MATERIAL | 303 Stainless Steel Handle, 6061 Billet Aluminum Ring and Delrin Grip



  • DIAMETER | 2 in - 51 mm
  • HEIGHT | 5.9 in - 150 mm
  • WEIGHT | 1.2 lbs - 544 grams
  • COUNTERBORED | For Reverse Lockouts and Shift Boot Retainer


Vehicle Fitment

  • 2004+ Subaru STI
  • 2002+ Subaru WRX
  • 2013+ Subaru BRZ
  • 1993+ Subaru Legacy
  • 1998+ Subaru Forester
  • 2000+ Subaru Outback

warning_symbolWARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to https://www.P65Warnings.ca.gov/passenger-vehicle.

More Information
SKU CircuitSphere150-M12x1.25mm
Product Type Drivetrain, Interior and Safety
Drivetrain Shift Linkage and Bushings
Interior and Safety Accessories
Brand Raceseng
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