I got my new Kayak roof rack yesterday. The wood is lightweight and has a thin square shape slip resistance bottoms. small and medium sizes compatibility is different. Recomendadas 100x100 It sounded somewhat like my main system but through this pair of earbud. The backs are difficult to remove from the fobs. Then line it up on the EarPods then flip it back on the correct side. Overall very happy with the results, will buy again if I need more! The negatives are that the clamp that would connect to the handlebars is round, and mine are tapered. Theres no danger of it tilting.