Originally Posted by
JohnDThompson
There's a difference between Schwinn's 571mm bead seat diameter and Raleigh's 590mm bead seat diameter (650A) tires but tubes aren't so fussy. Any nominally 26" tube that's reasonably close to the tire width should work.
Uh, but you wouldn't really use a 559 tube in a 590 tire, would you? If I had to get rolling quickly, I would, but not normally.
Commando, of course, I don't know anything about the bike industry in your area, but in the US, most bike shops carry a huge variety of tube sizes, including sizes they rarely see. Here, tubes are the highest-markup item in the shop. They typically pay $2 wholesale and sell for $6 retail. I would think this is one reason they don't mind carrying that inventory.