These bones are made from specially treated Ti 6Al-4V grade 5 titanium alloy, these parts offer exceptional strength and a substantial reduction in rotational inertia. They ensure quick acceleration and deceleration, giving stock racers a crucial competitive advantage.

Application: 

• 71mm length bones are needed when using the 81mm Rear Arm and -4mm Rear Hub options. 
• These ultra-lightweight bones are optimized for stock racing, specifically for the 21.5 to 17.5 classes.

Key Features and Specifications:

• Ultra-lightweight at just 6.54g for the pair
• In-house ultra-high precision tight tolerance swiss machining
• Made from treated Ti 6Al-4V grade 5 Titanium alloy
  
• Improved acceleration
• Better braking response 
• Increased power transfer 
• Better agility and responsiveness when cornering
  
• Lower overall vehicle weight
• Laser-etched logos and identification markings

Includes:

• Two CVA bones

Replaces: HD CVA Bones, 71mm # 92549

Fits the following when using the 81mm Rear Arm and -4mm Rear Hub option:

• RC10B84
• RC10B84D
• RC10B7
• RC10B7D

For optimal performance, use with:

900144 R1WURKS (B7 Series) Ultra Lightweight Rear CVA Axle, Titanium

990063-1 R1WURKS CVA Barrel, Titanium

Always grease and service CVA joints before every race or practice day: Use R1WURKS Black WS2 Grease at the joint and drive cup during assembly