AHL Motorcycle Tire Inner Tube 4.10/4.60-18'' TR4 Straight Valve Stem OEM replacement rear tire inner tube, ideal for the motorbike Premium quality butyl rubber, wear-resistant and long service life Heavy duty valve stem,TR4 straight valve, round shape 100% Brand new,easy to install, good working condition Quality Assurance!If you are not satisfied with our products, we accept all of the return, replacement or refund requests