For tubeless tires 35 mm length 15 mm stem mount How many times have you wished that you had one of these in your tool box Our straight valve stem for tubeless scooter tires (or any tubeless tires, including ATVs & dirt bikes) will work with a veritable multiplicity of scooter rims, has a universal 15mm stem mount diameter, and an overall length of 35mm Description How many times have you wished that you had one of these in your tool box Our straight valve stem for tubeless scooter tires (or any tubeless tires, including ATVs &; dirt bikes) will work with a veritable multiplicity of scooter rims, has a universal 15mm stem mount diameter, and an overall length of 35mm. Great for just about any scooter that uses tubeless tires. At Monster Scooter Parts’ everyday low sale price, you may want a spare one for each tubeless rim you own.