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My 56cm Langster seems small, do I need a 58cm frame?

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My 56cm Langster seems small, do I need a 58cm frame?

Old 06-13-13, 08:02 AM
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My 56cm Langster seems small, do I need a 58cm frame?

(I'm going to apologize in advance for not being able to go to a bike shop and get fitted for a bike. I realize that is the best option and having read threads similar to this before that this is good advice.)

I currently ride a 56 CM Specialized Langster ('08 London because I used to think I was cool). I'm planning on selling that bike for a few reasons (mainly I want a steel frame with a non-sloping top tube that will accept fatter tires since the roads near me are horrific) and building up a new bike with Fyxation's Eastside Track Frameset (https://www.fyxation.com/shop/en/183-...-frameset.html). I'm a little stuck with what to do about sizing, however. My Langster seems really small; I'm about 6'1 with pretty short legs (31'' inseam) and a long torso and so it feels like I'm always way out in front over the bike when I am riding. I mainly ride around town and to and from work (about two miles on flat ground, so nothing major) so the ability to throw the bike around isn't a big deal to me. I'm much more interested in having a comfortable bike that I can ride at a relatively relaxed pace for long periods of time without feeling like I'm really cramped (I'm throwing a coaster brake and porteur bars on the new bike, so definitely not built for speed).

I've purchased both the 55cm and 58cm versions of the Eastside Track Frameset and don't really know which one I should build up. I haven't had too many bikes, and so I'm not sure how the sloped top tube of the Langster translates when measured against the more traditional geometry of the Eastside Track. I've copied the geometry of all three bikes below; if anyone has any ideas about which might be best for me I'd really appreciate any insight.

Specialized Langster 56 CM Geometry

Top Tube Length (Horizontal) 565 mm
Seat Tube (C-Top of top tube) 520 mm
Head Tube Length 180 mm
Heat Tube Angle 73.0 
Seat Tube Angle 73.25    
Bottom Bracket Drop 69 mm
Chain Stay Length 405 mm
Wheel Base 991 mm
Standover Height 786 mm
Fork Rake 43 mm

Fyxation 58 CM Geometry

Top Tube (effective) 580 mm
Top Tube (actual) 580 mm
Seat Tube (C-Top of top tube) 580 mm
Head Tube Length 159 mm
Heat Tube Angle 73.0 
Seat Tube Angle 73.5    
Bottom Bracket Drop 60 mm
Chain Stay Length 400 mm
Wheel Base 993 mm
Standover Height 836 mm
Fork Rake 38 mm
Fork Length 380 mm
Seat Post 27.2 mm
Headset Style 1 1/8 Threadless
Bottom Bracket 68mm English
Rear Hub Spacing 120 mm
Material 4130 Cr-mo Frame / 4130 Cr-mo Fork

Fyxation 55 CM Geometry

Top Tube (effective) 560 mm
Top Tube (actual) 560 mm
Seat Tube (C-Top of top tube) 540 mm
Head Tube Length 130 mm
Heat Tube Angle 73.0 
Seat Tube Angle 73.5    
Bottom Bracket Drop 60 mm
Chain Stay Length 400 mm
Wheel Base 979 mm
Standover Height 809 mm
Fork Rake 38 mm
Fork Length 380 mm
Seat Post 27.2 mm
Headset Style 1 1/8 Threadless
Bottom Bracket 68mm English
Rear Hub Spacing 120 mm
Material 4130 Cr-mo Frame / 4130 Cr-mo Fork
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Old 06-13-13, 09:03 AM
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We should like, totally have a thread all about this stuff.
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