Compatibility: Compatible with a wide range of vehicles featuring 4-inch wheel hubs, including the Razor E300/E300S/E325 (front and rear), Razor Pocket Rocket (front and rear), EZip models E-400, E-450, E-4.0, and E-4.5 electric scooters, off-road go-karts, ATVs, utility dollies, hand trucks, and various other types
Specifications: This replacement inner tube fits perfectly into 3.00-4 inch tyres. 3.00 inches refers to the section width of the tire and 4 inches refers to the inner diameter of the tire. Suitable for wheels with an outer diameter of 12.7cm/5inch and for wheels with a slot width of about 5cm/1.96in. Before purchasing, please measure your wheel hub to ensure that you can successfully complete the inner tube replacement
High quality material: This 3.00-4 inner tube contains butyl rubber material with good elasticity and flexibility, which can effectively absorb road vibration during vehicle driving, reduce discomfort caused by bumps, significantly reduce air leakage, and have better air retention than traditional rubber inner tubes. This means you can reduce the need to inflate frequently and enjoy worry-free use for longer
The length, diameter and connection mode of the 90° direction air nozzle need to be adapted to the hub. Please confirm that there is sufficient space at the hub site to ensure that the nozzle can be successfully inflated
Installation tip: During installation, inflate the inner tube in a small amount, then place it into the outer tube that needs to be cleaned in advance, and continue to inflate until the inner tube is tightly fitted to the outer wall. Before use, be sure to check whether the inner tube is leaking, if there is a leak, please leave a message and provide relevant proof pictures, so that we can solve the problem for you more effectively