Originally Posted by seely
Whatever this is its one *****in' ride. Kept up pretty decently with a coworker on his '04 Bianchi San Lorenzo (10spd Dura Ace) yesterday on a 30mi warmup
As far as the grade of Tange, I'm not sure what this is. I think the OS3 may refer to the quality of the tubeset in this case, as the sticker just says Tange Chromoly with no grade indication. This was definately intended as a race bike in its day, zero eyelets and a sweet chain-hanger... internal cable routing too (can't wait to change the cables out
)
The OS3 indicates the component group i.e.: 105.
The internal cable routing is not a bother to change.
Wait until you lay that cheap japanese steel frame into a quick downhill chicane, boy are you going to smile.