This vintage Ritchey WCS alloy double crankset is a great addition to any road bike. With a 50/34t chainring and octalink bottom bracket shell type, it is compatible with Shimano and perfect for 2-speed bikes. The crankarm length is 175mm and the item length is 176mm, with a 110mm BCD. The black color and aluminum material give it a sleek and durable look. The package includes one crankset with chainring, and it is a part type crankset. It is a Ritchey WCS model, made in Taiwan, and is suitable for various bike brands. This item is in good condition, and will definitely enhance the performance of your bike. Especially if you are looking for a compact 110bcd 34/50 chainrings can make your eroica experience much better