Inner Tubes for Conti Grand Prix 4 Season 28mm
guys, apologies in advance for the dumb post...but
looking to buy 28mm Conti gp 4season tires for my road bike....
my current tubes are Conti 18-25c - I personally reckon I would need new tubes but some feedback on various forums suggest I can get away with using my current tubes-
Is this the case or what would be the more suitable of the 2 options below?
Schwalbe Inner road 18-28c tubes
Continental Tour 28 slim tubes 28-37c
any feedback welcome