Inner Tube 16x3.0 - Valve TR87 90 Degree Valve Stem - compatible with 16x3.25/3.50 Inner Tube 16x3.0 with TR87 Angled Valve Stem. TR87 Valve Stem: Centered, 90 Degree, Round Shape to fit on rims with a round valve base. Fits on 16x3.0 tire size, Also compatible with wheels that use 16x3.25/3.50 tubes Heavy duty durable valve stem. Unbeatable performance and value. Tires Size 16x3.00 are commonly found on electric scooters, ebikes, mopeds, unicycles, folding bikes and others