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Ride Irish!
Irish Cycles and Endurance Sports, LLC
www.irishcycles.com
Fayetteville, NC
info@irishcycles.com

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Discussions on frame fitting, technology, and how we do business

(please check back - more site updates to come)

 

       
         
 
Frame
Seat Tube (1)
Virt. Seat Tube (2)
Top Tube (3)
Head Tube (4)
Chain Stay (5)
Seat Tube Angle (6)
Head Tube Angle (7)
XS
48cm
50cm
51cm
105mm
406mm
73.7°
72.5°
S
51cm
52cm
53.5cm
125mm
406mm
73.5°
72.5°
M
54cm
56cm
55cm
155mm
408mm
73°
72.5°
L
57cm
58cm
57cm
185mm
408mm
73°
73°
 
   

When selecting your correct frame size, it is important to take into consideration not only your seat tube (seen as measurements 1 and 2 on our chart), but also your top tube requirements (as seen in measurement 3). We offer four sizes: Extra Small, Small, Medium, and Large. These frames are semi-sloping designs that rougly measure the equivalent of 48-50cm (Extra-Small), 51 to 53 (Small), 54-56 (Medium), 57-60 Llarge), in traditional geometry. We believe that the best size frame is one that is as small as possible along the seat tube (1 or 2) while allowing the upper body to lay out relaxed. This results in a comfortable ride that maximizes the mechanical properties of the bicycle and restricting weight to the lowest amount possible.

To determine the proper Irish Cycles frame size fit for you, we recommend you see one of our dealers. If not, or if you're buying through the web, you will first have to get a few measurements. The first measurement needed is your inseam. Stand with your back against a wall, your bare feet approximately 6" apart on a hard floor. Stand up as straight as possible and look towards the horizon. Place the spine of a hard backed book, or any other 90 degree angle item between your legs with one edge against the wall and pull it up firmly into your crotch. Have some one measure from the top edge of the book to the floor, in centimeters. (You can convert inches to centimeters by multiplying inches by 2.54.) Repeat two or three times, for consistency, and average the results to get your inseam length.

Now multiply the measurement of your inseam by 0.67. This will yield your approximate-sized down tube required on a bicycle. Compare that to our chart above and always round down to whole numbers. For your top tube measurement, we recommend you compare your current ride's measurement against our top tubes as listed in the above table or see a professional to obtain your true top tube measurement.

 

 
                     
 

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