This bike bell is engineered for versatility and is developed for maximum clarity on every ride. It features a CNC-machined ringer and a brass dinger, which makes it more than capable of handling all the knocks and bumps that come with clocking up the miles. Knog has also kitted out this version with a stitched vegan leather shim and metal injection moulded stainless steel to give it extra durability and style, wherever your adventures lead you. Sizing Information: The Small Oi Luxe fits 22.2mm bars e.g Mountain bike (near the grips), BMX & some old commuters. The Large Oi Luxe fits 23.8 – 31.8mm bars e.g. drop bar road bikes and some cruiser / commuters.