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sizing a bike for the wife(2 posts)

sizing a bike for the wifeaggie93
Sep 9, 2003 4:59 AM
My wife and I came across a Trek 1200 for cheap. She is new to the roadie scene and I am not a pro at sizing. It looks a tad small but not sure how to tell. With the seat up fairly high, she has a slight bend in her knee at the down stroke. She complains about her head being to far down. I do not know if this is so bad, but she might have a point. Should her head be closer to level with her butt? We are thinking on going to the bike shop today and having them check the size out.
two simple tests...C-40
Sep 9, 2003 5:38 AM
Measure the vertical height of the saddle above the top tube, near the nose of the saddle. Anything over 17cm (6-3/4") will make it difficult to get the handlebars up to the desired height for a beginner.

Also measure the height difference from the floor to the top of the saddle and the top of the handlebars. A beginner may want this difference to be only 1-3 inches and even experienced riders rarely exceed 4 inches.

These tests only verify the vertical size of the frame. The correct top tube length and stem length is more complicated.

Go to for basic bike fitting info.