Complete Quick Change for Rocket XR1 Rear End Kit

When every lap counts on the dirt track, a weak link in your driveline will cost you races. This Complete Quick Change Rear End Kit for the Rocket XR1 eliminates guesswork by combining a proven Winters 10" quick change with 1-ton Wilwood Starlite hubs, REM-polished bearings, and gun-drilled floating axles—all engineered to work together seamlessly. You get a track-ready system that puts maximum power to the ground with minimal parasitic loss, so you can focus on driving.

What's Included:

• Winters XR1 thermally-coated rear end
• Wilwood 1-Ton Starlite 55 hubs (pair)
• REM-polished bearing & seal kits (pair)
• Gun-drilled floating axles (31.5" & 36")
• Axle tube lock nut kits (pair)
• Lightweight aluminum lug nuts (set of 20)

Winters XR1 Quick Change Rear End Specs:

• Overall width: 69.625"
• Ring gear: 10" diameter
• Pinion: Centered
• Material: Thermally coated aluminum
• Includes: Axle tubes, bearings, seals

Wilwood Starlite 55 Hub Specs:

• Rating: 1-Ton rear
• Material: Black aluminum
• Brake rotor pattern: 8x7"
• Wheel studs: 5/8-11" press-in
• Stud length: 1.38" extended

REM-Polished Bearing Kit Specs:

• Style: 1-Ton tapered
• Finish: REM polished
• Inner race: 2.15" ID / 3.35" OD
• Outer race: 1.95" ID / 3.13" OD
• Includes: Bearings, races, seal

Gun-Drilled Floating Axle Specs:

• Material: High-strength steel
• Splines: 31 inside / 24 outside
• Lengths: 31.5" and 36"

Axle Tube Lock Nut Specs:

• Material: Red anodized aluminum
• Thread: 2-16" left hand
• Includes: Nut, washer, lock ring

Aluminum Lug Nut Specs:

• Quantity: Set of 20
• Thread: 5/8-11" right hand
• Seat: 45-degree tapered
• Head: 1" hex
• Style: Double-sided, open end