--- product_id: 325906801 title: "Ew-Sd300 E-Tube Di2 Wire Black, 300Mm" brand: "shimano" price: "$60.65" currency: USD in_stock: true reviews_count: 9 category: "Shimano" url: https://www.desertcart.us/products/325906801-ew-sd300-e-tube-di2-wire-black-300mm store_origin: US region: United States of America --- # 12-speed Di2 compatibility 300mm length for versatile routing Compact design for sleek integration Ew-Sd300 E-Tube Di2 Wire Black, 300Mm **Brand:** shimano **Price:** $60.65 **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your ride with the sleek power of Shimano Di2 precision! ## Quick Answers - **What is this?** Ew-Sd300 E-Tube Di2 Wire Black, 300Mm by shimano - **How much does it cost?** $60.65 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/325906801-ew-sd300-e-tube-di2-wire-black-300mm) ## 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 - • **Optimized 300mm Length:** Perfectly sized for internal routing, ensuring clean bike aesthetics and hassle-free installation. - • **Trusted Shimano Quality:** Backed by a limited warranty and top-tier craftsmanship, this cable is a must-have for serious cyclists. - • **Firmware Update Made Easy:** Reliable wired connection for quick, stress-free firmware updates on wireless shifters—never miss a performance boost. - • **Future-Ready Compact Design:** Slimmer electric components reduce weight and open doors to next-gen DI2 upgrades. - • **Seamless Shimano 12-Speed Sync:** Effortlessly compatible with 105, Ultegra, and Dura-Ace Di2 systems for pro-level shifting precision. ## Overview The Shimano EW-SD300 E-Tube Di2 Wire (300mm) is a compact, high-quality cable designed for seamless integration with Shimano 12-speed Di2 systems including 105, Ultegra, and Dura-Ace. Ideal for internal routing, it facilitates firmware updates on wireless shifters and supports future DI2 system enhancements, making it an essential upgrade for performance-focused cyclists. ## Description The Shimano EW-SD300 Di2 12 Speed eTube Wire is compatible with Shimano 12 speed Di2 systems like Shimano 105 R7150/R7170, Shimano Ultegra R8150/R8170, and Shimano Dura-Ace R9150/R9170. Measuring 300 mm, it's suitable for electric components ranging from 150 mm to 650 mm in diameter. This wire is designed to be more compact, reducing the size and weight of new electric components, and may potentially enhance the future capabilities of DI2 systems. 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 - Compatibility: Shimano 105 R7150/R7170 - Compatibility: Shimano Ultegra R8150/R8170 - Compatibility: Shimano Dura-Ace R9150/R9170 - Reduced Size: New electric components are more compact - Future Potential: May enhance DI2 system capabilities - Usage: Ideal for internal routing ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08X12QY4D | | Best Sellers Rank | #38,551 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #13 in Bike Cables | | Brand Name | SHIMANO | | Color | Silver | | Customer Reviews | 4.8 4.8 out of 5 stars (121) | | Global Trade Identification Number | 00192790634999 | | Included Components | Cables & Extensions, E-Tubes | | Item Length | 7 Inches | | Item Weight | 22.68 g | | Manufacturer | Shimano | | Manufacturer Warranty Description | Limited Warranty | | Material Type | Plastic | | Nominal Wall Thickness | 0.75 centimeters | | UPC | 192790634999 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** SHIMANO - **Color:** Silver - **Global Trade Identification Number:** 00192790634999 - **Item Length:** 7 Inches - **Item Weight:** 22.68 g - **Manufacturer:** Shimano - **Material:** Plastic - **Nominal Wall Thickness:** 0.75 centimeters - **Specific Uses For Product:** Cycling activities, Bicycle maintenance (internal cable routing) - **UPC:** 192790634999 ## Images ![Ew-Sd300 E-Tube Di2 Wire Black, 300Mm - 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. ## Frequently Bought Together - SHIMANO 2Nd Gen E-Tube Di2 Wire - SHIMANO 2 PORT JUNCTION EW JC302 SD300 PORT X 2 - SHIMANO Cycling Y7HE40000 TL-EW300 Cable Tool - Replacement Spare Parts for Bike --- ## 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.us/products/325906801-ew-sd300-e-tube-di2-wire-black-300mm](https://www.desertcart.us/products/325906801-ew-sd300-e-tube-di2-wire-black-300mm) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-20*