Shimano Square Type Bicycle Bottom Bracket - BSA 68Mm. Spindle: 117.5Mm - Ebbun300B17X | bottom-bike-brackets-and-accessories
Product details
| Management number | 247488186 | Release Date | 2026/08/16 | List Price | $7.20 | Model Number | 247488186 | ||
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| Category | |||||||||
Upgrade your bike's performance with the BB-UN300 Square Taper JIS Bottom Bracket, engineered for durability and smooth power transfer. Designed specifically for BSA/English threaded frames, this bottom bracket ensures reliable operation and compatibility with a wide range of cranksets. Materials & Construction Constructed with precision-machined components, the BB-UN300 features a sturdy hollow spindle made from high-strength materials, reducing weight without sacrificing durability. Its corrosion-resistant black finish provides lasting performance in diverse riding conditions. Performance & Engineering Optimized for efficient pedaling, the BB-UN300's JIS square taper interface delivers a secure and stable connection with your crankset. The hollow spindle design enhances lateral stiffness and power transfer, allowing you to ride with confidence on everything from casual rides to rigorous climbs. Components & Technology This bottom bracket fits a 68mm shell width and a 1.37-inch shell diameter, making it suitable for most BSA/English threaded frames. The spindle length of 117.5mm is ideal for a variety of crank configurations, ensuring compatibility and ease of installation. Note: Crankarm fixing bolts are sold separately. Style & Use Case With its sleek black finish, the BB-UN300 complements any bike aesthetic, from road to mountain bikes. Whether you're upgrading your commuter, mountain, or hybrid bike, this bottom bracket provides a smooth, reliable rotation that enhances overall cycling performance. Innovative Features The hollow spindle design is a standout feature, offering improved weight savings and stiffness. 's renowned engineering ensures this bottom bracket maintains consistent performance even under demanding riding conditions. Key Specifications: - Fits JIS Square Taper Cranksets - Bottom Bracket Shell Width: 68mm - Threaded for BSA/English frames (1.37" x 24 TPI) - Spindle Length: 117.5mm - Thread Interface
- Fits JIS square-taper cranksets
- SHIMANO quality/performance cartridge bearing square bottom bracket
- Adapter material: Aluminum
- Better chainline stability with chain line stabilizer
| ASIN | B08C7HWBNQ |
|---|---|
| Size | 68mmx117.5mm |
| Color | noir/argentà |
| Style | Bottom Brackets |
| Material | Steel Bearings |
| Brand Name | SHIMANO |
| Model Name | BB-UN300 Bottom Bracket |
| Part Number | EBBUN300B17X |
| Manufacturer | Shimano |
| Package Weight | 0.3 kg |
| Number of Items | 1 |
| Suggested Users | Unisex-Adult |
| Included Components | Bottom Brackets |
| Warranty Description | Limited Warranty |
| Item Dimensions LxWxH | 5.6 x 2 x 2 inches |
| Item Package Dimensions L x W x H | 5.67 x 1.77 x 1.69 inches |
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