Arkel's Randonneur Rack is a great way to add a rack to your bike. It's strong, light, stable, and you can attach or remove it in seconds! A sleek quick release bracket attaches to both seat rails, forming rock-solid attachment points. And, the front of the rack gently envelopes the seat post with a soft rubberized clamp and secure Velcro strap that's safe for every seatpost, including lightweight carbon models. Arkel's three point attachment system brings unequaled stability - it feels like it's bolted on to the frame!