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Bike sizing

 
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CT-hoodwink
Noob


Joined: 30 Apr 2010
Posts: 2

PostPosted: Tue May 11, 2010 12:23 pm    Post subject: Bike sizing Reply with quote

Hey guys. I need to precondition my post and let you know up front that I am a GT fanboy. Right now I am riding a 1996 18" GT Outpost, and I am about to upgrade to a 2010 GT Avalanche. I am having trouble deciding on what size I want to get. I love riding the trails in Memorial Park and Terry Hersey (XC riding), but I also like doing urban type stuff (wheelies, bunny hops and jumps). I am 5'9" and I am considering these three options: a medium (18") with a short stem, a small (16") with a regular stem or a small with a short stem. I want the bike to be as nimble and light as possible, but how small is too small from a freeride/XC standpoint? I wanted to get the local opinion, since you guys know first hand what trails I see weekly. Thanks!
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WaveDude
Trail Honcho


Joined: 21 Mar 2003
Posts: 245
Location: The Bowl Treehouse

PostPosted: Tue May 11, 2010 3:14 pm    Post subject: Reply with quote

Using seat-tube measurment for picking a bike is outdated. Get the bike that has a comfortable top-tube length and lets you run a short stem. There are not any hardcore freeride trails around here that require you to get a shorter than normal top-tube--you're gonna be pedaling it ALOT, not bombing down a DH trail and the Avalanche is not a Freeride/DH/Jump bike either. If I was in CA or CO or some place with big mountain trails I might consider getting a shorter bike--maybe.
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CT-hoodwink
Noob


Joined: 30 Apr 2010
Posts: 2

PostPosted: Tue May 11, 2010 9:21 pm    Post subject: Reply with quote

Thanks for the response WaveDude. I actually just put the seat-tube measurements for reference, but yes I am actually more worried about my top tube length. I'm afraid if I run a 40mm-50mm stem with riser bars on a small frame (21.5" top tube) then my cockpit will be too small. I guess when I was referring to freeride, I meant "urban freeride". I just want to be able to bunny hop with more ease, and wheelie for longer distances. I know having a shorter stem and risers help with being able to pick up the front wheel, but in your opinion does top tube length and wheelbase play a factor too?
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philipandrews1
Noob


Joined: 28 Jul 2010
Posts: 1
Location: Chicago

PostPosted: Wed Jul 28, 2010 11:20 pm    Post subject: Reply with quote

is there a scale for men or women to know which sizes of bike frames are fit for them?

can any body point me to the right direction? thanks.
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Last edited by philipandrews1 on Wed Aug 04, 2010 7:13 pm; edited 1 time in total
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Veljko
European Criminal


Joined: 02 Apr 2003
Posts: 398
Location: 713

PostPosted: Fri Jul 30, 2010 2:18 am    Post subject: Reply with quote

Start out here:

http://www.sheldonbrown.com/frame-sizing.html
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