Originally Posted by
brooklyn6640
Date of manufacture on Conti found, all conti have manufacture date on the side . I think more about the old inner tube . I keep my Veloflex at least 1 year not glued on rim , to dry.
Inner tubes last a long time since they're protected from UV and ozone (mostly) inside the tire. The inner tubes in my English 3-speed are perfectly fine after decades of service.