Tony Kart TDX S

Shared technology

A PROVEN FORMULA

The TDX shares its main technical features with the Racer 401 TS, the benchmark model in the Tony Kart range, and shares its main technical solutions while retaining its distinctive chassis made entirely from 32 mm-diameter tubing. The “S” evolution benefits from targeted component updates: the Direct Drive version adopts HFT stub axles, while the Shifter version uses HFZ stub axles. These are joined by new 180 mm floating brake disc and, for the shifter version, a new chain tensioner. The M11 fairings and BWD and BWZ braking systems remain fundamental elements of the design, while the sticker kit features an updated design.

HFT and HFZ stub axles

PRECISION AND ADAPTABILITY

Among the updates introduced on the TDX S are HFT and HFZ stub axles, intended for the Direct Drive configuration and Shifter version respectively. Developed by OTK Kart Group’s R&D Department in cooperation with the Tony Kart Racing Team, these new components are designed to optimise front-end behaviour, giving the driver more immediate feedback and a more intuitive understanding of the kart’s reactions. This development contributes to improved drivability and allows the chassis to perform with greater versatility as track conditions change.

BWD braking system

THE BEST FOR SINGLE-SPEED CATEGORIES

The BWD braking system is one of the defining features of the Direct Drive configurations. Its main components are the master cylinder and brake caliper, both made from top-quality materials carefully selected by OTK Kart Group’s R&D Department. Their design improves heat dissipation, significantly reducing brake fluid temperature and providing the driver with consistent braking feel. Among the updates introduced with the “S” evolution is the adoption of a 180 mm floating brake disc. This solution delivers more effective and consistent braking performance over time while also helping to reduce brake pad wearing.

BWZ braking system

TOP-LEVEL BRAKING FOR SHIFTER

The development programme that led to the BWD system for Direct Drive classes also gave rise to the BWZ braking system, specifically designed for shifter categories. Its main characteristics remain unchanged, with a master cylinder and rear brake caliper following the same design philosophy as the single-speed version.

The brakeforce distributor and front brake calipers have also been revised compared with the previous version, both in their forged and machined components. They now feature an innovative design, consistent with that of the master cylinder and rear caliper, incorporating optimised fins and thicknesses to further improve heat dissipation and structural rigidity. The BWZ version also adopts a 180 mm-diameter rear brake disc.

M11 bodywork kit

WIND-TUNNELLED DESIGN

Aerodynamics play an increasingly important role in karting. For this reason, OTK Kart Group’s R&D Department has devoted particular attention to this aspect, continuously developing innovative solutions and validating them through a combination of computerised CFD simulations, wind tunnel testing and, ultimately, on-track testing with the Tony Kart Racing Team. The M11 fairing kit, compliant with current FIA regulations, is the result of this development process. It includes a new-design front number panel spoiler and front bumper, paired with M10 side bumpers. The complete aerodynamic package is finished with a new sticker kit which retains the colours of the Prevalle-based brand for a more striking chassis appearance.

Pedals and steering wheel

FOR AN IDEAL DRIVING POSITION

The new TDX brings many updates while keeping several established features. Among them are the highly regarded fully adjustable pedals which, together with the inclined steering wheel hub —unchanged from the previous homologation—ensure an optimal driving position and allow quick and easy adjustment of the seating position. Completing the driving position for drivers of all sizes is the HGS steering wheel, also retained, featuring a high-grip covering that significantly reduces driving effort. Its development was gained from testing by the official drivers of the Tony Kart Racing Team.

DD2 version

DETAILS THAT MATTER

Like the Racer 401 TS, the TDX S in its DD2 version features some of the solutions introduced for Model Year 2027: the HFZ stub axle and the BWZ braking system with the new 180 mm-diameter floating brake disc. Specific to the chassis designed for the DD2 category is the removable support system for the exhaust support, developed for the engines used in this category.

	OK	KZ	DD2
FRAME MATERIAL	Molybdenum chrome steel	Molybdenum chrome steel	Molybdenum chrome steel
TUBES Ø	32 mm	32 mm	32 mm
WHEELBASE	1045 mm	1045 mm	1045 mm
AXLE Ø	50 mm with CIK-FIA stamp	50 mm with CIK-FIA stamp	40 mm
BRAKING SYSTEM	BWD with stub axles evolution type and DOT 5.1 lubricant	BWZ with stub axles evolution type and DOT 5.1 lubricant	BWZ with stub axles evolution type and DOT 5.1 lubricant
INCLUDED ACCESSORIES	Magnesium components, MXJ wheels, front torsion bar, standard aluminium pedals	Magnesium components, MXJ wheels, front torsion bar, standard aluminium pedals	Magnesium components, MXJ wheels, front torsion bar, standard aluminium pedals
BODYWORKS	M11 spoiler M11 front spoiler with CIK-FIA homologated connections M10 fairings stickers kit with new graphics	M11 spoiler M11 front spoiler with CIK-FIA homologated connections M10 fairings stickers kit with new graphics	M11 spoiler M11 front spoiler with CIK-FIA homologated connections M10 fairings stickers kit with new graphics

A PROVEN FORMULA

PRECISION AND ADAPTABILITY

THE BEST FOR SINGLE-SPEED CATEGORIES

TOP-LEVEL BRAKING FOR SHIFTER

WIND-TUNNELLED DESIGN

FOR AN IDEAL DRIVING POSITION

DETAILS THAT MATTER

Gallery

Axle

Tubes Diameter

WHEELBASE