Shimano Bottom BracketBB-UN5268mm Shell 124mm Square Taper AxleBearings smooth Ai BlurbThe Shimano Bottom Bracket BB-UN52 is a high-quality bike component designed for performance cycling. With a 68mm shell width and 124mm square taper axle, this bottom bracket is suitable for various bike models. Made from durable steel, this silver-coloured component includes everything needed for replacement or upgrade. The Shimano brand ensures reliability and precision in every ride, making it a must-have for any serious cyclist looking to improve their bike's performance.