--- product_id: 297506429 title: "Shimano EW-SD300 Di2 12 Speed eTube Wire" brand: "shimano" price: "€ 47.54" currency: EUR in_stock: true reviews_count: 9 category: "Shimano" url: https://www.desertcart.hr/products/297506429-shimano-ew-sd300-di2-12-speed-etube-wire store_origin: HR region: Croatia --- # 12-speed Di2 compatibility Internal routing optimized Reduced size & lightweight Shimano EW-SD300 Di2 12 Speed eTube Wire **Brand:** shimano **Price:** € 47.54 **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your ride with invisible power and precision. ## Quick Answers - **What is this?** Shimano EW-SD300 Di2 12 Speed eTube Wire by shimano - **How much does it cost?** € 47.54 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/297506429-shimano-ew-sd300-di2-12-speed-etube-wire) ## Best For - shimano enthusiasts ## Why This Product - Trusted shimano brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Featherlight Design:** Compact, reduced-size electric components that shave grams without sacrificing performance—because every gram counts. - • **Future-Ready Expansion:** Built to support evolving Di2 system capabilities, keeping your ride ahead of the tech curve. - • **Sleek Internal Routing:** Designed specifically for clean, hidden cable runs that elevate your bike’s aesthetics and aerodynamics. - • **Firmware Update Made Easy:** Simplifies wired firmware updates on wireless shifters—never get caught without the latest tech enhancements. - • **Seamless 12-Speed Integration:** Effortlessly compatible with Shimano 105, Ultegra, and Dura-Ace Di2 systems for next-level shifting precision. ## Overview The Shimano EW-SD300 Di2 12 Speed eTube Wire is a lightweight, compact cable designed for seamless integration with Shimano’s 12-speed Di2 electronic shifting systems, including 105, Ultegra, and Dura-Ace models. Engineered for internal routing, it enhances bike aesthetics and aerodynamics while enabling easy firmware updates to keep your drivetrain future-proof and performing at its peak. ## Description This Shimano EW-SD300 Di2 12 Speed eTube Wire is compatible with Shimano's 12-speed Di2 systems, including 105 R7150/R7170, Ultegra R8150/R8170, and Dura-Ace R9150/R9170. Its more compact design reduces the size and weight of new electric components, potentially enhancing the future capabilities of Di2 systems, and is ideal for internal routing use. Review: Di2 wire for new build or to help update firmware on wireless shifters - If you have new wireless DI2 drivetrain that is well hidden in the frame it can be difficult or just plain time consuming to pull out a powered wire long enough to reach the shifters to perform a firmware update that requires a wired connection. Combine this wire with a coupler and you can attach it to your front derailleur wire. Get two wires if you want to update firmware on both shifters at the same time. The wire worked great for the shifter update and is now safely stored in a place where I know where it is for the next update when I will inevitably dig around for it in every corner of the house, don’t find it and then order another wire and coupler, but then find the old wire when I am looking for a safe place to store the new wire and go to the same obvious wire storing place I overlooked when looking for the old wire. Then I’ll have three sets of wires which seems like a waste, but maybe a friend will need one and then I can just donate it to them and seem all altruistic when in fact I’m just getting rid of an extra wire and don’t really care if I’m helping my friend out as long as my wife stops berating me for buying another “useless” thing for my bike. Clearly she doesn’t know the need to update firmware or the pleasure of seeing oil slick titanium bolts shining like bright personal nebulae on a black bike frame. I should just start smoking cigarettes instead of cycling so much. At least my wife would be happy I’m spending time at home instead of biking all over the place enjoying nature, improving my mental status and enjoying fresh clean air. It will be a shorter life with complications of emphysema, smelling like smoke, which I abhor, but at least my wife can stay by my bedside in the hospital as I slowly expire, gasping for air as I use to do when pounding out the watts on a steep mountain pass under a blue sky. I might cry a few final tears at that image. It will be in that moment that my loving wife will tell me she wished I had taken better care of myself so we had more time together. And also, she’ll tell me she found that old Di2 wire I was looking for all those years ago. She’ll place it on my chest and I will reach for it in a vain effort as if holding it will help me recapture my health. Review: Update possible - Got cable plus connector. Was able to update software with no issues. ## Features - Shimano 105 Compatible: R7150/R7170 - Shimano Ultegra Compatible: R8150/R8170 - Shimano Dura-Ace Compatible: R9150/R9170 - Reduced Size: Lighter Electric Components - Potential Future Expansion: DI2 System Capabilities - Internal Routing Use: Designed for Internal Cable Routing ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08X1CC6KK | | Best Sellers Rank | #42,970 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #15 in Bike Cables | | Brand Name | SHIMANO | | Color | Silver | | Customer Reviews | 4.8 4.8 out of 5 stars (121) | | Global Trade Identification Number | 00192790635101 | | Included Components | Cables & Extensions, E-Tubes | | Item Length | 1 Meters | | Item Weight | 0.07 Pounds | | Manufacturer | Shimano | | Manufacturer Warranty Description | Limited Warranty | | Material Type | Multi | | Nominal Wall Thickness | 1.725 millimeters | | Outside Diameter | 3.45 Millimeters | | UPC | 192790635101 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** SHIMANO - **Color:** Silver - **Item Length:** 1 Meters - **Item Weight:** 0.07 Pounds - **Manufacturer:** Shimano - **Material:** Multi - **Nominal Wall Thickness:** 1.725 millimeters - **Outside Diameter:** 3.45 Millimeters - **Specific Uses For Product:** Bicycle internal cable routing - **UPC:** 192790635101 ## Images ![Shimano EW-SD300 Di2 12 Speed eTube Wire - Image 1](https://m.media-amazon.com/images/I/41zWQY4loEL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Di2 wire for new build or to help update firmware on wireless shifters *by D***S on December 31, 2024* If you have new wireless DI2 drivetrain that is well hidden in the frame it can be difficult or just plain time consuming to pull out a powered wire long enough to reach the shifters to perform a firmware update that requires a wired connection. Combine this wire with a coupler and you can attach it to your front derailleur wire. Get two wires if you want to update firmware on both shifters at the same time. The wire worked great for the shifter update and is now safely stored in a place where I know where it is for the next update when I will inevitably dig around for it in every corner of the house, don’t find it and then order another wire and coupler, but then find the old wire when I am looking for a safe place to store the new wire and go to the same obvious wire storing place I overlooked when looking for the old wire. Then I’ll have three sets of wires which seems like a waste, but maybe a friend will need one and then I can just donate it to them and seem all altruistic when in fact I’m just getting rid of an extra wire and don’t really care if I’m helping my friend out as long as my wife stops berating me for buying another “useless” thing for my bike. Clearly she doesn’t know the need to update firmware or the pleasure of seeing oil slick titanium bolts shining like bright personal nebulae on a black bike frame. I should just start smoking cigarettes instead of cycling so much. At least my wife would be happy I’m spending time at home instead of biking all over the place enjoying nature, improving my mental status and enjoying fresh clean air. It will be a shorter life with complications of emphysema, smelling like smoke, which I abhor, but at least my wife can stay by my bedside in the hospital as I slowly expire, gasping for air as I use to do when pounding out the watts on a steep mountain pass under a blue sky. I might cry a few final tears at that image. It will be in that moment that my loving wife will tell me she wished I had taken better care of myself so we had more time together. And also, she’ll tell me she found that old Di2 wire I was looking for all those years ago. She’ll place it on my chest and I will reach for it in a vain effort as if holding it will help me recapture my health. ### ⭐⭐⭐⭐⭐ Update possible *by G***N on February 2, 2026* Got cable plus connector. Was able to update software with no issues. ### ⭐⭐⭐⭐⭐ Just fine *by C***Y on February 17, 2026* Worked. Needed a cable to update my wireless shifters. Yeah, I know. But it was easy enough and the cable was half what the lbs wanted to do it. And I have the cable for next time if there is one. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/297506429-shimano-ew-sd300-di2-12-speed-etube-wire](https://www.desertcart.hr/products/297506429-shimano-ew-sd300-di2-12-speed-etube-wire) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-18*