GT sizing. How EXACTLY does it work?

Logic.Al

Senior Retro Guru
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I was discussing this with Barneyballbags at the weekend.

He had an 1998(I think) 18" STS that was the same size as my 20" On-One. But C-C was 16.5 C-T was 19"

I had a 1997 16" LTS that when built up was also the same size as my On-One.

I have a 1997 20" Zaskar that is huge. Way bigger than my On-One

And I tried a GT Arrowhead yesterday that was 18" and the top of the top tube was the same height as my On-One.

So how do they measure the frames. Do they make it up on a day to day basis?
Is the 18" Zaskar that's on its way to me going to fit me at 6'4"?
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GT's are measure C- T

The LTS/ STS's are a bit different due to the need to put the pivots in a specific place so the physical seat tube C-T size has to be yay big - the top tub length is correct for the given size.

Generally i go on top tub length to give me the right reach than worry about size (i've a 17" KHS with a real long top tube and a Proflex 955 in a 19" with a top tube that about .5" shorter than the KHS)

if your 6'4" a 20 wouds probably fit you better
 
Not sure this helps but I'm 6ft 2" and all my offroad Gt's are 18". I had a 20" and it felt too big for me off road.
My Timberline commuter is a 20" however as I prefer the bigger size on the road.

All my 18" Gt's have a 22" ctc top tube.
 
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