Originally Posted by fuji86

I don't build frames and this makes sense to me. It appears the gap is oriented on the top of the top tube and it may or may not be the manner in which the level is being held to the tube ? I'd be for holding the level on the sides of any of the tubes to see whether the frame turns appreciably. I'd really take the wheels off and then using twine to determine how straight the frame is laterally. That much side to side might make a difference, but vertically, the level might be misapplied to the top of the tube and creating more gap than is actually there ? I bought an internet SS/FG and determined the fork was off and got a replacement for it. The rest of the frame tracked straight and with the new fork it was near perfect. The bike is a hi-ten Chinese cheapo bike, so I didn't expect it to be perfect, but not nearly as bad as the original bike came. It rides just fine to this day.