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Bike Size Chart

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Welcome To Our Bike Size Guide

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Choosing the right size bike is paramount; you will be more comfortable, confident and enjoy your riding much more. In this bike size guide, you will know what measurements you need and which size bike you need. Or, our kids' bike size guide details what size they will need before you shop.

 

How Do I Choose The Right Bike Size?

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Bikes are usually measured by the length of the seat post tube - the tube on the frame where the seat post slides in to. Mountain bikes and bikes for kids are normally given in inches, but road bikes and some hybrids are shown in centimetres. Don't worry about converting it, we do that for you in our guides.

 

What Measurements Do I Need?

There a several key body measurements it is wise to know before choosing your bike, but the main two are your inside leg measurement and your height. 

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Bike Size Guides

 

Kids' Bike Size Guide

Wheel Size

Age Group
Inside Leg 
12 Inch Wheel 3 Years Plus
34-41cm
14 Inch Wheel 4 Years Plus 40-51cm
16 Inch Wheel
5 Years Plus 43-52cm
18 Inch Wheel 6 Years Plus 49-55cm
20 Inch Wheel 11 Inch Frame 6 Years Plus
50-57cm
20 Inch Wheel 13 Inch Frame 7 Years Plus 53-62cm
24 Inch Wheel 12 Inch Frame  
8 Years Plus
56-65cm
24 Inch Wheel 13 Inch Frame   
8 Years Plus 58-67cm
24 Inch Wheel 14 Inch Frame
8 Years Plus 60-69cm
26 Inch Wheel 14 Inch Frame      9 Years Plus 60-72cm
26 Inch Wheel 17 Inch Frame
10 Years Plus 68-80cm

 

Mountain Bike Size Chart

Inside Leg Range Frame Size
24 - 29" (61 - 74cm) 14" (35.56cm)
25 - 30" (64 - 76cm) 15" (38.1cm)
26 - 31" (66 - 79cm) 16" (40.64cm)
27 - 32" (69 - 81cm)
17" (43.18cm)
28 - 33" (71 - 84cm) 18" (45.72cm)
29 - 34" (74 - 86cm) 19" (48.26cm)
30 - 35" (76 - 89cm) 20" (50.8cm)
31 - 35" (79 - 89cm) 21" (53.34cm)
32 - 37" (81 - 94cm) 22" (55.88cm)
33 - 37" (84 - 94cm) 23" (58.42cm)

 

Road Bike Size Guide 

Inside Leg Range Frame Size
27 - 29" 48cm
28 - 30" 50cm
29 - 31" 52cm
30 - 32"
54cm
31 - 33" 56cm
32 - 34" 58cm
33 - 35" 60cm
34 - 36" 62cm