Shimano 105 R7000 Series will empower more riders than ever before to embrace the sport of road cycling. It will become the supportive groupset that beginner riders choose to help them train for, and ride in more serious races. By combining trickle down technology with a greater accessibility, SHIMANO 105 will continue to motivate and inspire more riders than ever to go after greater challenges. SS covers cassettes: 11-25T to 11-30T GS covers cassettes: 11-28T to 11-34T