Road bike tubes for a 700c bike tube setup on ISO 622 wheels, matching ETRTO 35–38 / 622 for wide tires. 2-pack set mounts on clincher rims for front and rear replacement during routine maintenance.
Bike tubes made from butyl rubber use an av schrader valve cor with 0.96 mm wall thickness. The tube expands evenly inside wide casings and uses a molded, vulcanized seam, with no reinforced protection layer.
Inner tubes for bike tires run at 40–80 PSI depending on tire limits and inflation steps. Pressure follows the mounted tire specification and supports mixed-surface riding on 700c gravel tires when installed within the supported width range.
A 700c inner tube with 48 mm Schrader valve fits standard rim valve holes and standard rim depth, not deep rims. Fixed core stays aligned while pumping, and included plastic caps protect the valve during transport.
The 40-622 700x38c bike tube range covers 35c–38c tire widths for gravel and touring use. Each tube weighs ~170 g (set ~340 g) and folds flat for pack storage or carrying as spares.