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⚡ Power your ride with invisible precision!
The Shimano Ultegra Di2 Internal Routing Junction Box (SM-JC41) is a lightweight, compact hub that connects all Di2 electronic shifting wires inside your bike frame. Compatible with Ultegra 6770, 6870, and Dura-Ace 9070 groupsets, it enables a clean, professional internal cable setup, enhancing both aesthetics and performance. With a mere 13.6g weight and a 2-year warranty, it’s the must-have upgrade for serious cyclists seeking flawless electronic shifting.
| ASIN | B005DTRW0E |
| Best Sellers Rank | #579,941 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #369 in Bike Cables |
| Brand Name | SHIMANO |
| Color | One Color |
| Customer Reviews | 4.5 4.5 out of 5 stars (62) |
| Date First Available | July 21, 2011 |
| Item Dimensions LxWxH | 3 x 4 x 2 inches |
| Item Package Dimensions L x W x H | 4.4 x 2.2 x 1.3 inches |
| Manufacturer | Shimano |
| Material | Plastic |
| Model Year | 2012 |
| Number of Items | 1 |
| Package Weight | 13.61 g |
| Part Number | SH4255 |
| Size | Internal/SM-JC41 |
| Sport Type | Cycling |
| Suggested Users | mens |
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