Middleweight or balloon frame?

Jan 26, 2007
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How can one determine if a 26" Schwinn frame is a middleweight or balloon tire frame? Are the dropouts and fork blades narrower or wider?
 

CCR

Mouth-Breather
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Mar 9, 2007
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balloon frames are wider where the tire passes through the frame/fork.

A balloon tire (2.125) on a typical rim usually has no trouble fitting in a middleweight frame/fork. Using balloon fenders on a middleweight frame isn't easy though.

trfindley.com pics

middleweight



balloon / heavyweight

 
Sep 29, 2008
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my gimmick...Use 3 fingers. Put your first 3 fingers in the triangle just below where Jeremy's tape measure is. Your fingers will be snug in a middleweight frame but plenty of room in a ballooner. Gary