See more: Inner tubes
18" Inner tubes, With steel center valve, suitable for 3.25 - 3.50 - 4.10 - 4.25/85 - 4.60 - 130/60 - 110/70 - 120/70 - 110/80 - 100/90 - 110/90, Metzeler
Finest quality butyl tubes, hold air much longer than natural rubber as butyl is non-porous. Stock type 16" inner tubes are available with moulded rubber off-set valve, steel off-set valve as well as steel center valve as used on later Harleys.