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27-03.-2008, 01:33 AM
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#1 |
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Guest
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bike sizing
I am now in the market to pick out my new bike.
The big concern I am having with picking out a new bike is sizing. I understand the ride hight I need, and seat hight, but am a bit concerned with the seat to handlebar measurements. I noticed that last year, when changing the stem on my current bike to a shorter piece, that I started getting back pains that I never had before. I have been riding this same bike since 1999. Is there a guideline or rule of thumb for bike/rider geometry that I can follow when looking for my new bike? I am riding a XC, with no large jumps or drops. Mike mlawrenc(at)gmail.com |
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28-03.-2008, 05:33 AM
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#2 |
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Guest
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Re: bike sizing
"mike" <mlawrenc@gmail.com> skrev i en meddelelse
news:a9aa5ac6-5ea9-4ee6-98a8-e7d7cd75ece8@d4g2000prg.googlegroups.com... >I am now in the market to pick out my new bike. > > The big concern I am having with picking out a new bike is sizing. > I understand the ride hight I need, and seat hight, but am a bit > concerned with the seat to handlebar measurements. > I noticed that last year, when changing the stem on my current bike to > a shorter piece, that I started getting back pains that I never had > before. I have been riding this same bike since 1999. > > Is there a guideline or rule of thumb for bike/rider geometry that I > can follow when looking for my new bike? > I am riding a XC, with no large jumps or drops. > > Mike > mlawrenc(at)gmail.com Im curious about this too. I think I bought myself a too large bike. Considering to get a shorter stem, to get a more upright position. Feel that the tension i the back is less when I rise and only steer with the knuckles. ;-) tomov (pardon my english) |
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30-03.-2008, 01:09 AM
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#3 |
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Guest
Posts: n/a
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Re: bike sizing
penta@panto.com wrote:
> "mike" <mlawrenc@gmail.com> skrev i en meddelelse > news:a9aa5ac6-5ea9-4ee6-98a8-e7d7cd75ece8@d4g2000prg.googlegroups.com... >> I am now in the market to pick out my new bike. >> >> The big concern I am having with picking out a new bike is sizing. >> I understand the ride hight I need, and seat hight, but am a bit >> concerned with the seat to handlebar measurements. >> I noticed that last year, when changing the stem on my current bike to >> a shorter piece, that I started getting back pains that I never had >> before. I have been riding this same bike since 1999. >> >> Is there a guideline or rule of thumb for bike/rider geometry that I >> can follow when looking for my new bike? >> I am riding a XC, with no large jumps or drops. >> >> Mike >> mlawrenc(at)gmail.com > > > Im curious about this too. > I think I bought myself a too large bike. > Considering to get a shorter stem, to get a more upright position. > Feel that the tension i the back is less when I rise and only steer with the > knuckles. > > ;-) > tomov > (pardon my english) > > Stand over height really determines frame size while stem length and seat position are determined by arm length torso to length,and when a bike is fit to you for proper riding position it is not always the most comfortable for people to ride in especially if you are more of a weekend warrior then a racer,a good LBS should help you fit your bike to your body and riding type(for free if you bought your bike there.{if they don't find a new bike shop})so shops don't care if the bike fits as long as they sell you something they have in stock be careful.If you already have a frame and don't want to buy a new one try different stem lengths and angles,with and without riser bars and find a place your comfortable riding and then get out and ride because if your not riding it ,it really doesn't matter how it fits! |
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02-04.-2008, 01:33 PM
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#4 |
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Guest
Posts: n/a
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Re: bike sizing
<penta@panto.com> wrote in message
news:47ebf677$0$2094$edfadb0f@dtext02.news.tele.dk... > "mike" <mlawrenc@gmail.com> skrev i en meddelelse > news:a9aa5ac6-5ea9-4ee6-98a8-e7d7cd75ece8@d4g2000prg.googlegroups.com... > >I am now in the market to pick out my new bike. > > > > The big concern I am having with picking out a new bike is sizing. > > I understand the ride hight I need, and seat hight, but am a bit > > concerned with the seat to handlebar measurements. > > I noticed that last year, when changing the stem on my current bike to > > a shorter piece, that I started getting back pains that I never had > > before. I have been riding this same bike since 1999. > > > > Is there a guideline or rule of thumb for bike/rider geometry that I > > can follow when looking for my new bike? > > I am riding a XC, with no large jumps or drops. > > > > Mike > > mlawrenc(at)gmail.com > > > Im curious about this too. > I think I bought myself a too large bike. > Considering to get a shorter stem, to get a more upright position. > Feel that the tension i the back is less when I rise and only steer with the > knuckles. > > ;-) > tomov > (pardon my english) > Vertical sizing like standover and leg extension is a lot easier than the other dimensions of the cockpit. There are a few websites out there that try to establish seat placement and stem length based on torso and arm measurements, but it's more art than science I think. The real world application is that you get a frame that is within the ballpark, and tweak your components to your personal preferences. I have two MTB frames that I ride that are nominally the same size (but different brands and slightly different geometries). One is my commuter, and one is a dedicated trail ride. They are set up quite differently, and both seem to work well for their purpose. My point being that even a best-guess at component sizing based on height, standover and those nominal measurements, will change based on usage and personal feel. Not to say that going to an LBS and having a pro fit you is a bad thing - if you give them all the right details (and they're good) they will get close. Experiment from there and find your sweet spot(s). A sore back may result form a big switch in stance. If it persists, try another stance. If it doesn't, sometimes it is just a personal adjustment your body makes to exercise under a new posture. |
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