According the Sheldon Brown, 3T bars are 25.9 which will fit 25.8 and 26.0
link please.
I was saying that forcing a 26mm bar into a 25.6 clamp was a bad idea, and at the risk of starting a "helmets?yesnostyle" fracas, forcing bits to fit puts unnecessary stress on the parts and will/may cause them to fail. IMHO it is a very bad idea to ignore manufacturers tolerances when your life is at stake and the track tastes nasty ;-)
I was saying that forcing a 26mm bar into a 25.6 clamp was a bad idea, and at the risk of starting a "helmets?yesnostyle" fracas, forcing bits to fit puts unnecessary stress on the parts and will/may cause them to fail. IMHO it is a very bad idea to ignore manufacturers tolerances when your life is at stake and the track tastes nasty ;-)