Retractable bike strap: The bike towing system allows you to pull your child on their own bike while you control and balance their own bike. The adjustable strap shortens or lengthens as you ride, allowing you to handle any terrain and water on the road.[Comfortable and Stable Traction]: This bike leash controls the distance between two bikes up to a maximum of 2.50m, providing a comfortable and stable grip. After the elastic band is stretched, 198lb load capacity, you and your child can enjoy a comfortable towing experience.[Light and Safe]: This bike tow strap has a sturdy rubber ring at one end with double hooks to attach behind the seat post and under the seat, making it's easy and safe to use. Easy to carry: the bicycle harness is very light and compact, so you can take it everywhere. It fits in a large bag or backpack and weighs only 280g. Dimensions: 15 x 10 x 7cm.[Easy to Pull]: With this bike leash, you can use the rope to pull your child to the top of the mountain, providing an easy towing solution for parents.