--- product_id: 478851418 title: "GX Type 2.1 Bicycle Rear Derailleur with 10 Speed Long Cage, Black" price: "R5688" currency: ZAR in_stock: true url: https://www.desertcart.co.za/products/478851418-gx-type-2-1-bicycle-rear-derailleur-with-10-speed store_origin: ZA region: South Africa --- # GX Type 2.1 Bicycle Rear Derailleur with 10 Speed Long Cage, Black **Price:** R5688 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** GX Type 2.1 Bicycle Rear Derailleur with 10 Speed Long Cage, Black - **How much does it cost?** R5688 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/478851418-gx-type-2-1-bicycle-rear-derailleur-with-10-speed) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description SRAM GX Type 2.1 Bicycle Rear Derailleur with 10 Speed Long Cage, Black ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00V8RZ9SW | | Best Sellers Rank | #110,165 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #50 in Rear Bike Derailleurs | | Brand | SRAM | | Brand Name | SRAM | | Case Material Type | Aluminium | | Color | Black | | Customer Reviews | 4.4 out of 5 stars 744 Reviews | | Global Trade Identification Number | 00710845771835 | | Included Components | Rear Deraille | | Item Dimensions L x W x H | 12"L x 8"W x 2"H | | Item Highlight | SRAM GX Type 2.1 10-Speed Long Cage Rear Derailleur - Clutch Technology | | Item Type Name | SRAM derailleur gx type 2.1 long cage 10 speed black | | Item Weight | 157 g | | Manufacturer | SRAM | | Manufacturer Part Number | 00.7518.080.000 | | Material | Aluminum | | Material Type | Aluminum | | Model Number | 00.7518.080.000 | | Mount Type | Standard | | Mounting Type | Standard | | Number of Items | 1 | | Number of Teeth | 10 | | Product Dimensions | 12"L x 8"W x 2"H | | UPC | 757183591480 710845771835 784427964175 | | Warranty Description | Limited Warranty | ## Product Details - **Brand:** SRAM - **Color:** Black - **Item Weight:** 157 g - **Material:** Aluminum - **Mounting Type:** Standard ## Images ![GX Type 2.1 Bicycle Rear Derailleur with 10 Speed Long Cage, Black - Image 1](https://m.media-amazon.com/images/I/61obu8T-BgL.jpg) ## Questions & Answers **Q: What size should I use for a 36 -11 casette?** A: Forgive me, but you are asking the wrong question.The cage size is controlled by the maximum amount of slack chain created by the combination of chain rings AND cassette. This is called "Chain Wrap".To formula for chain wrap is (Big Chain Ring - Small Chain Ring) + (Big cassette Cog - Small Cassette Cog). So if you are using a compact double chain ring (50-34) and a 11-36 cassette the numbers work out to (50 minus 34) + (36 minus 11) or 16 + 25 = 41. This means that if you shift from a big-big combination to a small-small combination, your derailleur has to be able to handle 41 teeth of loose chain, which calls for a long cage. On my bike a have a single 40 tooth chain ring and a 11-42 cassette so the chain wrap works out to (40 - 40) + (42 - 11) = 0 + 31 = 31. So even though I have a huge cassette I only need a medium cage because I have no front derailleur to create more chain wrap.Hope that helps. **Q: what is short, medium.long cage?** A: It has to do with chain wrap capacity. Small=30t Chainwrap Capacity, Medium=35t, Long=47t. The wrap is just the difference between the number of chain ring teeth plus the difference between the cog teeth. For example a 53/39 with a 12-25 cassette requires 14 + 13 = 27 teeth of wrap capacity needed from the RD. **Q: Will this work with Shimano Ultegra shifter** A: No, actuation will only work with sram.... The good news is that it will work with both sram 10 speed road and Mtb... Unlike the newer 11 speeds witch are road or mtb specific. **Q: Can this be used with a shimano 11/42 cassette ?** A: I used it with a sunrace 11-42 cassette but I needed a longer b tension screw(which was not provided) so you will likely run into the same issue. ## Frequently Bought Together - Sram MTB Gx Type 2.1 Long Cage Rear Derailleur - Black, 10-Speed - SRAM GX Trigger Shifter 10-Speed Rear Black - SRAM PC-1051 10 Speed Chain w/PowerLock 114 Links --- ## 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.co.za/products/478851418-gx-type-2-1-bicycle-rear-derailleur-with-10-speed](https://www.desertcart.co.za/products/478851418-gx-type-2-1-bicycle-rear-derailleur-with-10-speed) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-10-20*