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Giant Sizing?(11 posts)

Giant Sizing?Xoc
Jul 27, 2002 12:32 PM
Hey all,

Can anyone tell me what size Giant I would need if I ride a 51 c-c or 53 c-t? I'm thinking medium, but I'm not quite sure.
re: Giant Sizing?aliensporebomb
Jul 27, 2002 1:33 PM
Have you tried both the small and medium sizes? You
sound like you're right on the cusp.

I'm 5'7" but have a tall torso and shorter legs and for
whatever reason the small fit me perfectly so I got that.

What I'd been riding for the last four years was a 16"
mountain bike and a 24" road bike (which was manifestly
too large but it was abandoned here so it was free and I
had to ride it).

It's possible that either might suit you so try one out
and see what speaks to you better.

My friend Doug who's been riding forever essentially had
thought if I was used to the 24" frame that I'd go for a
larger one but the small size TCR was the one.

My two cents or so.
Nice looking bike. nm.Leroy
Jul 27, 2002 5:32 PM
re: Giant Sizing?Xoc
Jul 27, 2002 5:38 PM
No I haven't tried either one. The Giant dealer near me doesn't stock Giant road bikes, but the will order them. They are a big italian shop. I may have to drive out to another shop and see if they have any on the floor.
re: Giant Sizing?Dave Hickey
Jul 27, 2002 2:05 PM
I ride a 51 c-c traditional bike and I'm very comfortable on small. I road a medium and I felt very stretched out. Remember you need to look at the "virtual top tube length", not the actual TT length.
You are between sizes. But according to Giant, prolly SM.elviento
Jul 27, 2002 6:46 PM
If you ride a 51c-c, your ideal size is between small and medium, slightly closer to small.

Given lots of crotch clearance, toptube is the main thing to look at, and the Medium has a 55.5 toptube. That's a typical toptube length for a 56cm frame.

What I hate about the size small is that there is too much slope which makes it too much like a mountain bike. My guess is that Giant wants to catch the market of all below 5'9" with the SM, including those as short as 5". How much more will the frames cost if they had 2 more sizes????

Sorry for the rant.
re: Anyone else 5'7" riding a Giant TCR series?fz4vgq
Jul 27, 2002 7:30 PM
Hi XOC, I'm in the same boat as you, my LBS only has a medium TCR1. I'm 5'7" like aliensporebomb. I test rode the medium with a #2 seatpost which was too tall so the dealer installed a #1 seatpost, which fit great for my seat to pedal distance. My question is - is there any disadvantage to going with the medium frame with the smallest(#1) seatpost and installing a shorter stem (probably a 9or10cm, I think a 120mm comes on a medium?) to get the proper reach? The same dealer has a small OCR1, it just looks too darn small! I know in a standard geometry frame i need a 52cm frame. Aliensporebomb, what # seatpost do you have on your bike?
re: Anyone else 5'7" riding a Giant TCR series?Xoc
Jul 28, 2002 10:23 AM

I finally found a dealer that had both a medium and small in stock, and I'm in exactly the same boat as you are. The medium needed a smaller seat post and stem for me, and the small just felt too small.

So I would second your question. Any disadvantage to running a short stem and seatpost on a medium frame?
Any disadvantage to running a short stem ..... YESJohnG
Jul 28, 2002 2:00 PM
The bike will be VERY twitchy and unstable through turns and "at speed". IMHO, if you need anything less than a 10cm stem then you're compromising the handling.

re: Giant Sizing?RCole
Jul 28, 2002 6:33 AM
I don't have a Giant but I think your question is more related to making the change from a traditional frame to a compact. I just switched from a Litespeed Vortex to a Merlin XLCompact. In making the change I realized the most important measurement was the length of the top tube or "virtual top tube" for a compact frame. I had a 56.5 top tube on my Vortex. Looking at the specs for the Merlin I assumed that I would be on a Medium Large which had a virtual TT legnth of 56.5 (and same wheelbase). I test rode it and it felt really small. I then test rode a Large that had a virtual TT of 57.5 and that felt perfect. The numbers don't add up so it must be the way each manufacturer measures their frames (and also the headtube and seattube angles play a part too). Hope this helps.
Jul 28, 2002 11:26 AM
Don't let any fool (i.e. bike shop dimwit) tell you otherwise.