

⚙️ Upgrade your ride with precision – don’t let a worn axle slow you down!
The Shimano Ultegra 6870 Di2 and 6800 Rear Derailleur B-Axle Assembly is a genuine OEM replacement part designed for seamless compatibility with Shimano’s high-performance Ultegra rear derailleurs. Weighing only 22.68 grams and measuring 4 x 2.5 x 0.75 inches, this precision-engineered axle ensures smooth shifting and reliable durability, making it an essential upgrade for serious cyclists aiming to maintain peak drivetrain performance.
| Item Package Dimensions L x W x H | 4 x 2.5 x 0.75 inches |
| Package Weight | 0.05 Pounds |
| Item Dimensions LxWxH | 4 x 2.5 x 0.75 inches |
| Item Weight | 22.68 g |
| Brand Name | SHIMANO |
| Number of Items | 1 |
| Manufacturer | Shimano |
| Part Number | Y5YC98010 |
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