Review on Mellbree Extensions Extension Compatible Motorcycles（2Pcs） by Troy Meza

If you have a cartridge with a full size replacement, you know how difficult it is to check the air pressure in the replacement. I bought this so I can attach an extension to the spare and get air pressure and add air if needed. Simply mount, slide over the valve and thread the rubber extension through the hole in the rim. This allows you to access the valve and check the pressure.