Inner Tube 16x2.5 - Valve TR87 90 Degree Valve Stem - compatible with 16x2.50 / 16x2.70 Inner Tube for Electric Bike Tire Size 16x2.5 TR87 Valve Stem* TR87 Valve Stem: Centered, 90 Degree, Round Shape to fit on rims with a round valve base. Fits on 16x2.5 tire size. Also compatible with wheels that use 16x2.50/2.70 tubes Heavy duty durable valve stem. Unbeatable performance and value. fits on 16x2.50 tire used on many electric scooters, ebikes, kids mountain bikes and others