OTK Rear Hub Long 50x115mm

The OTK Rear Hub Long 50x115mm (part 0053.EA) is the long-length magnesium rear wheel hub in the OTK rear hub range. It mounts the rear wheel to the 50mm rear axle across OTK-based kart chassis and is a genuine OTK spare part.

Key Specifications

• OTK Part Number: 0053.EA
• Vendor: OTK
• Material: Magnesium alloy
• Axle bore: 50mm
• Hub length: 115mm
• Sold: Individually

Chassis Compatibility

• Tony Kart: Racer 401 RR, Racer 401R, Racer 401S, Racer 401 T, Racer 401 TDX
• Kosmic: Mercury RR, Mercury R, Mercury T, Mercury TDX
• Exprit: Noesis RR, Noesis T, Noesis TDX
• LN Kart: LN Four, LN Four T, LN Four TDX
• Redspeed: RX RR, RX T, RX TDX
• CS55 MY2025
• EOS
• Gillard: TG17 MY2025, TDX

Setup Notes

A longer rear hub increases the axle's effective gripping surface at the rear wheel, which tends to add rear-end stability and grip. The 115mm long hub is often selected on lower-grip or wet-condition tracks, or where additional rear stability is needed under acceleration. It is part of a four-length rear hub range — compare with the 77mm short hub, 92mm standard hub, and 148mm extra long hub.

Designed for use with the OTK 50mm Rear Axle. Wheel nuts, axle, axle key, and fixing hardware are sold separately.