--- product_id: 281705119 title: "SHIMANO UN300 English Bottom Bracket" brand: "shimano" price: "SAR 149" currency: SAR in_stock: true category: "Shimano" url: https://www.desertcart.com.sa/products/281705119-shimano-un300-english-bottom-bracket store_origin: SA region: Saudi Arabia --- # Aluminum adapter for lightweight durability Precision cartridge bearing Enhanced chainline stability SHIMANO UN300 English Bottom Bracket **Brand:** shimano **Price:** SAR 149 **Availability:** ✅ In Stock ## Summary > ⚙️ Ride smoother, ride smarter — upgrade your drivetrain game! ## Quick Answers - **What is this?** SHIMANO UN300 English Bottom Bracket by shimano - **How much does it cost?** SAR 149 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.sa](https://www.desertcart.com.sa/products/281705119-shimano-un300-english-bottom-bracket) ## 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 - • **Versatile Fit Options:** Available in Standard, E-type, and chain case variants to suit your specific bike setup. - • **Lightweight Yet Durable:** Aluminum adapter material balances strength with minimal added weight for peak efficiency. - • **Trusted Shimano Quality:** Backed by a 4.6-star rating and proven durability, this bottom bracket is a must-have upgrade. - • **Optimized Chainline Stability:** Chain line stabilizer reduces drivetrain wear and maximizes power transfer. - • **Engineered for Smooth Performance:** Shimano’s cartridge bearing ensures ultra-reliable, low-friction pedaling every ride. ## Overview The SHIMANO UN300 English Bottom Bracket features a high-quality cartridge bearing and aluminum adapter for lightweight durability. Designed to improve chainline stability with a built-in stabilizer, it comes in three structural options to fit various bike setups. Trusted by cyclists worldwide, it offers reliable performance and a smooth pedaling experience. ## Description 5 JJ-----Shimano BB-UN300 Lower Bracket - Standard - SHIMANO Quality/Performance Cartridge Bearing Square Center Movement - Better Chain Stability with Stabilizer Chain Line Series: Shimano Tourney TX800 Series - Suitable for JIS Square Cone Crankset - Cable Spindle - No Fixing Bolts - Adapter Material: Aluminum 1009904(014-023 )3/16 --#22123 (10:2/23/23:ARI 22723 (30:3/7/23:ARI---1:rtn 20/3/23---1:rtn on 19/5/23----1:RTN ON 5/15/23 . 101623 (20:10/30/23:ari 122623 (20:1/4/24:ari 122823 (20:1/4/24:ari----1:RTN ON 1/19/24 ## Features - SHIMANO quality/performance cartridge bearing square bottom bracket - Better chainline stability with chain line stabilizer - 3 structures available // Standard, E-type, chain case options - Adapter material: Aluminum - CARTRIDGE BOTTOM BRACKET SET, BB-UN300 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08C786DW8 | | Bearing Number | EBBUN300B22X | | Bearing Type | Cartridge Bearing | | Best Sellers Rank | #48,007 in Sporting Goods ( See Top 100 in Sporting Goods ) #12 in Bike Bottom Brackets | | Brand Name | SHIMANO | | Compatible Lubricant | Grease | | Customer Reviews | 4.6 4.6 out of 5 stars (1,251) | | Included Components | Bottom Brackets | | Item Dimensions | 14.3 x 5.2 x 4.9 centimeters | | Item Type Name | Mid Movement | | Item Weight | 300 Grams | | Manufacturer | SHIMANO | | Material Type | Metal | | Model | EBBUN300B22X m | | Number of Items | 1 | | Part Number | EBBUN300B22X | | Set Name | EBBUN300B22X | | Specification Met | Herstellerstandards | | UPC | 192790619156 | | Unit Count | 1 Count | ## Product Details - **Bearing number:** EBBUN300B22X - **Brand:** SHIMANO - **Item dimensions L x W x H:** 14.3 x 5.2 x 4.9 centimeters - **Item weight:** 300 Grams - **Material:** Metal ## Images ![SHIMANO UN300 English Bottom Bracket - Image 1](https://m.media-amazon.com/images/I/51PPpbGvVfL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: The tittle says 110 mm long but the image says 123, shall I trust its a 110mm ?** A: Different lengths may be available depending on the part number chosen. The same image may be used for multiple products of similar type. **Q: Is this equal to a shiman0 un26, 68x127,5mm bottom bracket.** A: Please watch RJ the bike guy's How To Upgrade Vintage Bike With Sealed Cartridge Bottom Bracket in YouTube **Q: Will this fit a mongoose sycamore 26in mountain bike** A: when you remove the old one read the dimensions on the bb. you can even take a measuring tape and measure the hole. don't throw away the used one until the new one is found and installed. maybe youtube your bike repair. **Q: How much does this bottom bracket weigh?** A: Amazon’s specs say .29 Kg. As the package weight. The packaging would not be significant. ## Frequently Bought Together - SHIMANO Square Type Bicycle Bottom Bracket - BSA 68MM, Spindle: 122.5MM - EBBUN300B22X - BIKEHAND Bike Bicycle Compatible with Shimano Bottom Bracket Removal Remover Tool - Park Tool PolyLube 1000 Bicycle Grease --- ## 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.com.sa/products/281705119-shimano-un300-english-bottom-bracket](https://www.desertcart.com.sa/products/281705119-shimano-un300-english-bottom-bracket) --- *Product available on Desertcart Saudi Arabia* *Store origin: SA* *Last updated: 2026-09-25*