Michelin's A4 Airstop Tube is ideal for training and recreational riding. Available in size 29" x 1.9" - 2.1" (48/54-622 ISO), with a 40 mm threaded Presta valve stem. 230 g.
Note: If your rims are designed for Schrader valves (like on a car tire), you can use "Presta Stem Savers"—metal sleeves that fit over Presta valves to provide a snug fit in Schrader-sized valve holes.
A guide to common bike tire sizes and how to find the tires that will fit your bike.
Understanding older bicycle tire sizes.
A useful chart for determining the tire size you need for your bicycle.
Tips for proper bicycle tire mounting and tire safety.
A guide to understanding tire width.
A guide to understanding bicycle tire tread patterns and what you should look for.
Understanding bicycle tube valve types, materials, and sizing.