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The front hub CRG 40x80 mm (R2.0 range) in black aluminum is a part of the original manufacturer (Original CRG Share), specifically developed to meet the extreme constraints of the Queen category chassis Kz (gearbox).
With its dimensions of 40 mm inner diameter (for the large diameter rockets specific to KZ) and its 80 mm long, This hub of the R2.0 series offers an ideal support surface to stabilize the front train. In kz, the front braking and the motor torque require absolute stiffness: this CNC machined aeronautical quality aluminum hub enciesces these forces without flinching, avoiding geometric deformation in full support and guaranteeing a guidance of surgical accuracy. Its matte black anodized finish gives it excellent durability to the projections and the official factory team look.
The hub is delivered assembled and ready to install:
The hub body 40x80 mm in black anodized aluminum (R2.0 series).
2 high speed rocket bearings 40 mm already fitted.
The internal spacer aluminum calibrated to the thousandth.
The 3 wheel studs high strength for fixing the rim.
The clamping ring / locking screw integrated to index your settings.
* "Hi the artists of the gear lever! In kz, the front train undergoes patients' constraints, especially braking with 4-piston stirrups. The hub R2.0 in 40x80, it is the classic to have a rigid and direct front train.
My old old trick: never go up these big bearings of 40 to dry on your rockets. Clean nickel the rocket axis with brake degreaser and put a very fine graphic grease or white grease veil. If you go up that dry, with the huge heat released by the front brake discs right next door, the bearing will spray by electrolysis on the axle. To get it out of disassembly on Sunday night, you will cry !
And be careful at the tightening of the rim on the studs: we squeeze the torque crosswise, no need for extension on the key, the hub aluminum must work flat! "*
Place the kart on his carriage. Remove the 3 rim nuts and take out the front wheel. Unscrew the central locking nut of your 40 mm rocket.
Take out the old hub. Inspect the rocket axis and the front brake disc. Clean the axis using brake cleaner and clean cloth to remove burned platelet dust.
Place your rocket spacing rings according to the desired channel width. Apply the trick to Michel (fine lubrication), then dramatically slide the new complete hub CRG R2.0 on the 40 mm axis.
Replace the rocket nut in place. Tighten it firmly and then replace its pin or safety system. Launch the hub by hand: it must rotate without any suspect noise or hard point despite the presence of the brake disc in the caliper.
Q: Does this 40 mm hub adapt on a standard category kart (Rotax Max, x30) ?
A: Not. The category karts without box (single Speed) generally use 17 mm or 25 mm diameter rockets. This 40 mm hub is exclusively reserved for the massive rockets of the KZ (box) chassis, equipped with manual front brakes.
Q: What is the influence of the length 80 mm on the behavior of the kart ?
A: A length of 80 mm offers excellent compromise. The shorter (ex: 65 mm), the front train wins in mechanical flexibility and releases the kart if the track is too eager. Longer (ex: 95 mm), the front train stiffens to the maximum, which is perfect for giving instantaneous grip to the steering wheel on a cold or slippery track. The 80 mm is the most versatile intermediate size.
Q: Are the internal 40 mm bearings sold separately in case of wear ?
A: Yes, quite. Although this hub is delivered complete with its factory-mounted original bearings, the 40 mm bearings remain consumables you can replace later using a standard extractor, without the need to replace the aluminum hub body.
The front hub CRG 25x80 mm (R2.0 range) in black aluminum is a part of the original manufacturer (Original CRG Share), developed for the frames of the single categoriesSpeed high level like the KF, OK, OK or TAG (X30, Rotax) using 25 mm diameter rockets.
With its balanced dimensions of 25 mm inner diameter and his 80 mm longThis R2.0 series hub is an essential standard to refine the settings of your front train. Its 80 mm intermediate length offers the rigidity necessary to ensure a precise and direct front train, while maintaining the flexibility required to allow the chassis to work optimally in curve. CNC machined in aeronautical quality aluminum, it is anodized in matte black for maximum wear resistance and a sober and official racing look.
The short front hub CRG 17 mm high precision aluminum is a part of the manufacturer origin (Original CRG Share), specially developed for the chassis of the range Mini (Mini 60, minimal, cadet) of the group CRG (CRG, Maranello, Dr. Kart).
The "short" version of this hub is an essential setting piece to refine the behavior of your front train. By reducing the contact and clamping surface on the rocket, this hub brings a greater mechanical flexibility by the front train, offering the young driver a brighter direction, a more incisive train and better registration in tight turns. CNC machined in a high quality aluminum block, it guarantees maximum strength for minimal weight.
The front hub CRG 25x80 mm (R2.0 range) in black aluminum is a part of the original manufacturer (Original CRG Share), developed for the frames of the single categoriesSpeed high level like the KF, OK, OK or TAG (X30, Rotax) using 25 mm diameter rockets.
With its balanced dimensions of 25 mm inner diameter and his 80 mm longThis R2.0 series hub is an essential standard to refine the settings of your front train. Its 80 mm intermediate length offers the rigidity necessary to ensure a precise and direct front train, while maintaining the flexibility required to allow the chassis to work optimally in curve. CNC machined in aeronautical quality aluminum, it is anodized in matte black for maximum wear resistance and a sober and official racing look.
The front hub CRG 40x96 mm (R2.0 range) in Magnesium (mg) is the ultimate factory piece (Original CRG Share), Developed specifically for the Queen category Kz (gearbox).
With its solid inner diameter of 40 mm and its maximum length of 96 mm, this hub of the R2.0 series is designed to bring a extreme rigidity at the front train. The choice of magnesium instead of aluminum is a high-level technical choice: it reduces the suspended weight while offering exceptional properties of thermal dissipation, which avoids overheating your rocket bearings and stabilizes the temperature of the rims during the overpowering braking of the kz. The length of 96 mm offers a maximum lever arm on the rocket, ideal for literally planting the front ground train and get ultra-direct behavior in the sinuous.
The front hub CRG 25x80 mm (R2.0 range) in black aluminum is a part of the original manufacturer (Original CRG Share), developed for the frames of the single categoriesSpeed high level like the KF, OK, OK or TAG (X30, Rotax) using 25 mm diameter rockets.
With its balanced dimensions of 25 mm inner diameter and his 80 mm longThis R2.0 series hub is an essential standard to refine the settings of your front train. Its 80 mm intermediate length offers the rigidity necessary to ensure a precise and direct front train, while maintaining the flexibility required to allow the chassis to work optimally in curve. CNC machined in aeronautical quality aluminum, it is anodized in matte black for maximum wear resistance and a sober and official racing look.
The front hub CRG 40x80 mm (R2.0 range) in anodized finish Gold is a part of the original manufacturer (Original CRG Share), specifically developed to meet the extreme mechanical stresses of the Queen category chassis Kz (gearbox).
With his Inside diameter of 40 mm (adapted to the large diameter rockets specific to KZ) and its 80 mm lengthThis hub of the R2.0 series offers a perfect seat for your front train. In kz, the power of the front braking and the motor torque require absolute rigidity. This CNC machined aeronautical quality aluminum hub enciesive these lateral forces without flexing, ensuring a Surgical directional precision in full support. Its superb gold anodized finish protects the aluminum from corrosion while bringing the official "racing" look of the group's high-end chassis.
The front hub CRG 17 mm in size m (Medium) is a high-end frame of the original manufacturer chassis (Original CRG Share), specially developed to refine the guidance of 17 mm rockets (currents on the chassis of the categories Mini, minimal, cadet, mini 60).
The great particularity of this version lies in its internal architecture to double bearing. Unlike standard hubs that only use one bearing at each end, this model integrates two juxtaposed bearings on each side. This technique makes it possible to double the contact surface on the rocket, offering a Distribution of colossal loads and increased rigidity of the front train. By limiting the flexion of the rocket axis during large supports or passages on the vibrators, this hub guarantees a perfect and constant geometry of your front tires.
The piston with original band Rotax is an essential component for engines Rotaxdesigned to provide optimal performance and exceptional durability. This piston is suitable for multiple engine models Rotax, including the Rotax Micro max, Rotax Mini max, Rotax Junior, and Rotax Max (senior). Fabricated Rotax, a brand recognized for its quality and innovation in the karting world, this piston is ideal for demanding drivers looking for reliable and efficient solutions for their karting engines. In addition, Magickart offers this piston at a more competitive price than that of French and Italian competition, allowing you to benefit from the best quality at the best price.
The piston with original band Rotax is an essential component for engines Rotaxdesigned to provide optimal performance and exceptional durability. This piston is suitable for multiple engine models Rotax, including the Rotax Micro max, Rotax Mini max, Rotax Junior, and Rotax Max (senior). Fabricated Rotax, a brand recognized for its quality and innovation in the karting world, this piston is ideal for demanding drivers looking for reliable and efficient solutions for their karting engines. In addition, Magickart offers this piston at a more competitive price than that of French and Italian competition, allowing you to benefit from the best quality at the best price.
The CRG Kt2 is the versatile chassis par excellence of the Italian manufacturer. Unlike the Rébec Road (more rigid), the KT2 uses a frame compound full of tubes of 30 mm in diameter. This architecture offers controlled flexibility, ideal for freeing the engine in categories without gearbox like the OK, Iame X30 or the Rotax Max.
Its geometry allows fast adaptation to all track conditions (high grip or green track "). Featuring the last components of the range CRG RacingHe combines exceptional motor skills at a surgical front train accuracy.
The CRG KT2 2026 Version Kz redefines the standards of the Queen category. While the Road Rebel (32mm) remains the choice for the tracks with very high grip, the KT2 in 30mm Has become the favorite weapon of Kz pilots looking for more agility and ease in the support changes.
For 2026, CRG Reworked the composition of chrome-molybdenum steel to provide a better response from the front train during degressive braking. This KZ version stands out for its localized structural reinforcements and its integral front / rear braking system, essential to stop the power of 50 horsepower engines
The hub of 35 mm long is considered a "short hub". In karting, The choice of hub length is a fundamental adjustment tool:
Short hub (35 mm): It offers less contact surface with the axle than models of 75 or 90 mm. This usually allows to have a "freer" behavior of the rear train, Helping the chassis to be free from curve, Ideal on tracks with a lot of grip (adhesion).
The hub of 40 mm long is often considered the "standard" or "versatile" value on adult karts equipped with a 30 mm (x30, axle, Rotax, Kz, ok). Unlike very long (75-90mm) hubs that considerably rigidify the rear, or the very short (35mm) that fully freed the chassis, the 40 mm Offers neutral and healthy behavior, ideal for starting a setting session before refining.
The hub of 85 mm is a "long" adjustment room. In karting, the choice of the hub length is directly related to the leverage exercised on the axle:
Stability and Grip: With 85 mm, you increase the rigidity of the rear train and removing the load outward. This is the ideal tool for more moving output output or to expand your back path without stacking spacers (which weakens the assembly).
R2.0 version: This name indicates an evolution of design at CRG (best machining, optimized weight and anodized finish "Gold" for higher resistance to corrosion).
The front hub CRG 40x80 mm (R2.0 range) in black aluminum is a part of the original manufacturer (Original CRG Share), specifically developed to meet the extreme constraints of the Queen category chassis Kz (gearbox).
With its dimensions of 40 mm inner diameter (for the large diameter rockets specific to KZ) and its 80 mm longThis hub of the R2.0 series offers an ideal support surface to stabilize the front train. In kz, the front braking and the motor torque require absolute stiffness: this CNC machined aeronautical quality aluminum hub enciesces these forces without flinching, avoiding geometric deformation in full support and guaranteeing a Guidance of surgical accuracy. Its matte black anodized finish gives it excellent durability to the projections and the official factory team look.
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