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giant tcr frame sizing(4 posts)

giant tcr frame sizingTomS
Aug 13, 2002 8:12 AM
I was looking at the sizing charts for the giant tcr compact frame, and saw that there's a lot of overlap between the "small" and "medium" sizes, depending on what size seatpost you choose. If I fall into that overlap, which I think I do, is there any reason to go with the smaller or bigger frame? Before I go either way I'd try to test ride both, just wondering if there were any general issues either way.

I've been comfortably riding a 54cm frame for a couple of years, and I was recently looking at a bunch of sizing guidelines and most of them say I should really be on something smaller. (I'm about 5'6" and a half, with a 30" pants inseam) When I got my bike (my first and only road bike) the shop guy pretty much eyeballed the fit, and it seemed to work, so I went with it. If/when I upgrade I want to be a little more careful!

Uhh, all this is just out of curiosity of course. Not in the market for a new bike at all. Nope, definitely not.
re: giant tcr frame sizingfz4vgq
Aug 13, 2002 8:34 AM
Hi TomS I was in the same situation as you 2 weeks ago, i'm also 5'6.5" with a 30" inseam. I test road both a small and a medium, with the medium I needed a #1 (shortest) seatpost, with the small i needed a #4 seatpost which is right in the middle of the chart. The medium felt way to long (being 5'6.5" with a 30" inseam we have pretty short torsos) , i think Giant puts a 125 or 130mm stem on the medium so that makes it that much longer. My seat to pedal position was easily set up on the medium but the reach was just too long, i would of had to put way to short of a stem on it to make it work and Giants are already twitchy. The small was just the opposite, I would have had to put too long of a stem on it to make it work and the small just seemed to darned small, really felt like i was riding a childs bike. I ended up buying a Litespeed aluminum (Sirius) in a medium, Litespeeds medium is right in between Giants small and medium frames size wise, it fit me perfect without to long or short of a stem. Being 5'6" most here will reccomend the small which I really think is correct but they just seem so darn small! good luck
I would measure....bob_vanderhaus
Aug 13, 2002 9:01 AM
the giant based on the top tube length and a reasonable stem size. I am 6 feet tall with a 32 inch inseam and have ridden the large with a 10cm stem as well as the medium with a 12.5 and 14 cm stem. I noticed little to none in the way of handling differences between the two. I am riding the medium with the 14cm stem and it rides great. Some may say the a 14cm stem is too long, but I notice no difference than the 12.5 I had before. Find the fit that works and remember that giant will give you any stem seatpost combo to fit your body.
re: giant tcr frame sizingGeekRoadie
Aug 13, 2002 1:03 PM
I'm a "tweener" too.

I'm 5'-6.5" with a 30" inseam and went with a size small since the medium top tube was a bit on the long side for me. One of the things that I've learned is to ride the smallest frame that you can fit comfortably. Stems and seatposts give you some flexibility for tuning (within reason). Getting a smaller frame would normally yield a lighter and stiffer frame, too. These qualities might be imperceptible during a test ride so just make sure you spend some quality time with both sizes at the shop.

Just for reference sake, I ride 51-53cm in conventional frame sizing.

hth
Mike