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Compact Frame Question(7 posts)

Compact Frame Questiongabaguy
Aug 31, 2003 9:15 PM
Ever since I switched to my new Compact Giant (medium) I have had lower back troubles. I am 5'10" with a 30-31" inseam. When I set up the right saddle height, it puts me too far back (measured with the plumb line from the knee method) and my seat is as far forward as it goes.

Would a size large, by allowing me to decrease the seat post length, alleviate this problem?

Or will compact geometry simply not work for me?
My basic opinion...Smiker
Aug 31, 2003 10:38 PM
I have little to base this on I'm afraid, not knowing what you rode previously etc. But the Giant compact frames are quite stiff. If you have an alloy model it could just be due to a slightly harsher ride. I'd go to a reputable bikeshop and see what their view on your fit is. If possible, go somewhere you really trust, or where they sell compact and traditional geometry road bikes (for a less biased opinion)

I've been getting a sore lower back recently, but I put that down to poor core strength and stability. Maybe a fitball could be a good investment if this is the case for you too?

re: Compact Frame Questionbsdc
Sep 1, 2003 4:31 AM
The medium frame has a 73.5 degree seat angle. The large frame has a 73 degree seat angle. Thus, a large frame will set the saddle even further back and will not help. You might try a seatpost with no setback.

Another reason you might be having back problems is that compact frames often have a shorter head tube, creating more drop between the saddle and handlebars. You might flip the stem if you haven't already done so.

Finally, stretching your back and hamstrings might help your situation a little but will not overcome poor fit.
stock seat post?Frith
Sep 1, 2003 3:01 PM
If your using the stock seatpost... I'm talking about that aero carbon thing then you need to find a seatpost with no setback. I had to scrap mine because it put me to far behind the bb on my tcr comp. Medium sounds right for your size.
stock seat post?gabaguy
Sep 1, 2003 3:29 PM
I thought the Burrows thing (or whatever it is) that comes with these giants didn't have much set back. Oh well.

Do you have some suggestions for a nice light seatpost with no setback.
well you don't mentionFrith
Sep 1, 2003 6:02 PM
the kind of giant it is that you're riding. I ride a 2003 giant tcr 1 composite. The seatpost that came with it was the giant carbon aero. I didn't end up doing very much research into what good non-setback posts are out there because my LBS did a straight swap for carbon opus which I like but know very little about. U.S.E. Makes a really nice post with no setback but it's really $$$. Your best off posting a topic here to the effect of "Can anybody reccomend a good non-setback post" and then just specify your price range...your bound to get a bunch of good feedback.
well you don't mentiongabaguy
Sep 1, 2003 6:34 PM
Thanks man.

BTW:I am riding a 2002 Once Team (aluminum).