The new Shimano 105 is lighter and more efficient, and makes ""pro-level"" technology more accessible to part time racers and fitness enthusiasts. Shimano 105 is a by-product of our premier engineering range but has its own unique identity, offering a greatly enhanced and sleek design that's backed by a high performance. The Shimano 105 design concept of ""smooth, Round and Natural"" is consistently demonstrated in every component, giving its user a sense of satisfaction and pleasure.