Originally Posted by
Kontact
Most of the Formula tubes were "superset", which was a 1/.7/1 downtube like SP with SL .9/.6/.9 top tubes. Stays depended on the model level.
Champion #2 is pretty much the same as SL, so a lighter downtube than SP.
FWIW, the Formula One tubing label does not say "Superset".
My Tange #2 framed bike rode
nothing like a couple of SL tubed bikes in same frame size. Maybe geo was to blame.
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Last edited by Wildwood; 12-31-24 at 09:25 AM.