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Look frame sizing(13 posts)

Look frame sizinghulksmash
Aug 15, 2002 11:54 AM
A little confused here about frame sizes for Look bikes. I haven't been able to find a geometry chart for them, but I heard that they run really big, as in a 51 cm frame being more like a 53 or 54. Any thoughts/experiences on this? Thanks!
re: Look frame sizingDave Hickey
Aug 15, 2002 12:01 PM
Go to for geometry info. Their frames are measured center to center and their top tubes aren't any longer that other comparable bikes. If you're comparing to manufactures that measure center to top(Trek), I guess that you can say they run big.
Excel sports has the chart.MXL02
Aug 15, 2002 12:02 PM

When you look at the size, make sure you find out whether it is measured C-C or C-T, and look at the length of the top tube in the size you want.
Yeah, as I suspect, Look sizes are C-C which means ...MXL02
Aug 15, 2002 12:05 PM
you should order differently than other sized bikes. For instance, I ride a 56 cm and therefore would need to order a 54cm Look.
Thanks allhulksmash
Aug 15, 2002 12:23 PM
Quick responses, thanks. Now I just have to justify the $ on that closeout 381i to my wife.
re: Look frame sizingSimonRex
Aug 15, 2002 12:45 PM
I have been researching this very same thing for the last 2 days and there is a lot of conflicting/ambiguous info on the frame sizies. From what I have gathered, they run around 1.5 cm bigger than equivalent in other bikes (frame size). I will try and find the site and post a link. Beware of some of the Look geometry info out there cause I found much of it conflicting.
Park your butt on one, no conflict there! (nm)NJRoad
Aug 15, 2002 12:51 PM
re: Look frame sizingfiltersweep
Aug 15, 2002 1:01 PM
My Look 57 is larger than my Trek 58... Treks run notoriously small.

To the other poster insinuating to just try one- I purchased a Look at my LBS. None of the Looks were built except for a 54- so it isn't always a matter of "try before you buy." Of course, after the build, you are right there in the shop...

Have you tried the Look website?
re: Look frame sizingNJRoad
Aug 15, 2002 1:33 PM
If I walked in to my LBS with the intent of dropping $1000+ on a frame plus another $1500-2000 in build-up and they wouldn't put 1 together before I paid for it, I'd find a new shop or at the very least they should be confident enough in their bike fit to not hold you to that size once they've built it.
Aug 15, 2002 2:43 PM
Aug 15, 2002 3:29 PM
my 55 cm 381i is bigger than my 56 GT. I could have fit on a 54 cm 381i easy as well.
Buying without tryinghulksmash
Aug 16, 2002 7:51 AM
From the deal that one can get overseas on a 381 it seems like the right thing to do ones homework. Totalcycling has great prices on em compared to my LBS. The 400-500 bucks saved is worth the research time, and it seems like there's a bit of controversy about the sizing.

I think I'll mock up a bike out of wood in my basement based on Looks geometry.
Nothing unusual about Look frame sizing . . .DCW
Aug 18, 2002 2:29 PM
I have a 54cm Guerciotti Neuron and a 54cm Look 381i. Seat tubes both measure exactly 54 cm c-c. Top tubes measure 54.5 and 55.5, respectively. Both fit me perfectly with 120 mm stem. Why? the Look seat tube angle is more relaxed, so I use a seat post with less setback (Use Alien Carbon) than on the Guerciotti (Campy ti). In other words, the saddle ends up precisely in the same position relative to the bars and the bottom bracket. Both sets ups give me the same knee-over-pedal spindle position.

I also have a 56 cm (c-t) Colnago Dream Plus. It also works out perfectly for me with a 120 mm stem and Campy seatpost. I bought all of these bikes on-line without test rides (GVH, WCP, Square deals). But I was very careful to calculate the geometries and build specs, with the help of the on-line dealers before doing so.

One difference, though: the Look has a somewhat taller headtube, so a use 1/2" spacers with it and 1" with the Guerciotti (almost level stem with both).

Final point: I like all the rides, but Look is the best. It is sweet and smooth: stiff BB, comfort of ti, liveliness of steel, etc. It's the only bike I've ridden that seems to become part of my body. I seldom even think of the bike when I'm riding.