I have 700 X 25C (25 - 622) tires on my road bike and I am confused on whether some tires and tubes a friend has will fit. He has a bunch of unused tires, still in the packages, varying in size but are all labeled in inches. If I understand Sheldon Brown correctly I can use 28 x 1 5/8 x 1 1/4 is that right? I am confused because the tubes I get from LBS are say (700 x 20/28C, 27 x 3/4" - 1 1/8") so the 27 on the tubes throws me off. Also does the same conversion apply to tubes, er... what size tubes can I use? tubes are only labeled in inches.
These tires are cheap and I don't want to put a lot of money into this bike so I am trying to find out if I can make use of them. Every $ I save is a $ towards my new bike.