Originally Posted by
bobbyl1966
Thank you for the very helpfull answer. Kinnesis 6061 aluminum is same as my cannondale R300?. I see that aluminum frames type in bikes direct. My bike is 1998 you think is worth i upgrade that bike and i not look to buy newer bike? My bike have 126 mm dropouts. When i buy the bike used is had wheels with 7 speeds cassete. But i put wheels 130mm. Is fit but i have to pull the dropouts for make the wheel seat correct in the dropouts. that is go give problem in long run? I have stop ride the bike for now because need new bottom bracket. And now have downtube shifters but i want put brifters on this bike. Is worth i do that in old bike or is better i found new bike. I ride 56cm bike buy my cannondale is 58cm. that is sounds much difference ? Now when i ride the bike i feel okay
6061 is the aluminum alloy and T6 is the heat treatment, so the alloy chemistry is the same but depending on the diameters, wall thicknesses, and butting profiles of the tubing used, two bikes using 6061 aluminum alloy may ride very differently. I can't advise you on whether or not you should get a new bike, but if you want to use rear wheels with 130mm OLD hubs and the rear dropout spacing on your frame is 126mm, spreading an aluminum rear triangle does stress it which isn't good. I would suggest getting fit by a professional to ensure you get the correct size frame. Having a well fitting bike makes a huge difference in comfort.