Complete Quick Change for Rocket XR1 Rear End Kit

Gain a decisive advantage on the dirt track with this all-inclusive Quick Change Rear End Kit, engineered specifically for the Rocket XR1 chassis. This is not just a collection of parts; it's a fully integrated, track-ready system designed for maximum performance, strength, and serviceability. From the thermally-coated Winters rear end to the ultra-low friction REM-polished Wilwood hubs, every component is selected to help you put power to the ground reliably and efficiently.

This complete package removes the guesswork, providing everything you need for a professional-grade driveline installation. It combines robust, 1-ton rated components with precision-finished parts to withstand the brutal demands of dirt late model racing while minimizing parasitic horsepower loss.

Key Features & Benefits:

• Complete Race-Ready Solution: This comprehensive kit includes the rear end, axle tubes, gun-drilled axles, 1-ton Wilwood hubs, REM-polished bearings, axle tube lock nuts, and lightweight aluminum lug nuts.
• Superior Strength & Durability: Built around the proven Winters 10" quick change rear and heavy-duty 1-ton Wilwood Starlite 55 hubs to handle aggressive driving and rough track conditions.
• Optimized for Performance: Lightweight, gun-drilled axles reduce rotating mass, while REM-finished bearings and races create an ultra-smooth surface that cuts friction, lowers operating temperatures, and frees up horsepower.
• Precision Engineered: Every component is designed for a perfect fit and seamless integration, ensuring a smooth build and dependable performance lap after lap.

Component Specifications

Winters XR1 Quick Change Rear End

• Product Line: XR1
• Overall Width: 69.625 in
• Pinion: Centered
• Ring Gear: 10" Diameter
• Construction: Thermally Coated Black Aluminum
• Includes: Axle Tubes, Bearings, Seals, Hardware, Vent, Fill/Drain Plugs

Wilwood Starlite 55 Wide 5 Hubs (Set of 2)

• Race Style: 1-Ton, Rear
• Material: Black Aluminum
• Brake Rotor Mount: 8x7 in Pattern
• Wheel Studs: 5/8-11 in Press-In Style, 1.38" Extended Length (Non-Drilled)

REM Polished Wheel Bearing & Seal Kit (Set of 2)

• Style: 1-Ton Tapered
• Finish: REM Polished for Ultra-Low Friction
• Inner Bearing: 2.15" ID / 3.35" OD Race
• Outer Bearing: 1.95" ID / 3.13" OD Race
• Includes: Inner/Outer Bearings, Races, and Seal

Axle Tube Lock Nut Kits (Set of 2)

• Intended Hub: 1-Ton
• Material: Red Anodized Aluminum
• Thread: 2-16 in Left Hand
• Includes: 6-Point Nut, Keyed Washer, Lock Ring, and Hardware

Gun-Drilled Floating Axles

• Material: High-Strength Steel
• Splines: 31 Inside / 24 Outside
• Included Axles: One 31.5" and one 36"

Aluminum Lug Nuts

• Quantity: Set of 20
• Thread: 5/8-11 in Right Hand
• Seat: 45-degree Tapered
• Head: 1" Hex
• Style: Double-Sided, Open End