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Yep, you guessed it, another newbie question!(4 posts)

Yep, you guessed it, another newbie question!DB
Mar 13, 2001 8:00 AM
What effect does differing seat tube angles have on ride characteristics? Will I notice a difference between a 73 and a 74? There are two frames I'm looking at having built up as a commuter/tourer/'crosser and I do not have the option of riding both before I choose.

Both frames have a 71 degree head tube angle. Will this make the bike steer like a pig? It just seems like a fairly relaxed angle considering the wheelbase is about 42-43 inches.

Thnaks!
DB
what size frame?Dog
Mar 13, 2001 8:08 AM
seat tube/top tube

Doug
what size frame?DB
Mar 13, 2001 8:46 AM
For the bike with the 73 degree seat tube angle, effective seat tube length is probably about 58cm, top tube is 58.5.

For the bike with the 74 degree seat tube angle, effective seat tube length 57cm, top tube 58.2.
what size frame?Kerry Irons
Mar 13, 2001 3:46 PM
74 degrees in the seat tube is like a crit frame. You say you have frames with 74 degree seat tubes and 71 degree head tubes? For example, a Ritchey cross frame in this frame size would be a 73.5 seat tube and a 72 degree head tube. Your frame choices are an unusual for touring, but probably OK for cross/commuting. A typical touring frame would have a slack seat tube angle and long chain stays and possibly "square" frame angles (head and seat tube equal). The fork offset and chainstay length are going to influence handling significantly, so you need to factor them into the equation. A reputable builder/manufacturer would not supply a funky combo, so as long as you aren't looking at a frame from someone who is trying to make a "statement" you're probably OK.