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Sizing info

Sizing info

For bike types

Hybrid Bike, Mountain Bike, City Bike, Trekking Bike, Touring Bike, Racing (Road) Bike, Fixed Gear Bike, Cyclocross Bike, Triathlon/TT Bike, Electric Bike, Tandem Bike, Adult Tricycle, Work Bike

Leg Length (LL):

Take your shoes off and measure from the floor to the top of the inside of your leg (crotch). When seated on the saddle, place your heel on the pedal at the bottom of the stroke and your leg should be nearly straight. Then when you place the ball of your foot on the pedal (the correct position when cycling) your knee will be slightly bent at the bottom of the stroke.

The minimum and maximum dimensions we cite are with the saddle at its lowest and highest positions respectively. Your Leg Length should be within the range.

If your Leg Length is near to the minimum dimension we cite, then you will have to lean forward to reach the handlebars. If your Leg Length is near to the maximum dimension we cite, then you will be sitting more upright. Typically we suggest that your leg length should be near to the middle of the range of adjustment.

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Standover Height (SH):

It is a good idea for safety and convenience to have a clearance between the top tube of the frame and the bottom of your crotch. This only needs to be 2 - 5 cm (1 - 2 in) for on-road cycling, and 5 - 10 cm (2 - 4 in) for off-road cycling. This is why road bikes tend to have top tubes that are (nearly) horizontal, whereas mountain bikes have tubes that slope downwards.

Check that the Standover Height plus the clearance you want is less than your Leg Length. Additionally, if you want to cycle wearing a long skirt/dress, then a low(er) Standover Height is a necessity.

Frame Size (FS):

This is a general sizing method used for bikes. Traditional bikes had horizontal top tubes, so the Frame Size was a good indication of the size of bike you needed. However, with so many bikes now having sloping top tubes, we only inlcude this measurement so that you can relate the bike we are selling back to the manufacturer's sizing tables if you wish.

 

Other Bike Types

For all other bike types we give an approximate fitting size based on wheel size, height of rider, and (for kid’s bikes) age.

BMX/Jump Bike 16" wheel; age 5 - 7 years; height 110 - 122 cm (3' 7" - 4' 0")
18" wheel; age 7 - 11 years; height 122 - 147 cm (4' 0" - 4' 10")
20" wheel; age 11+ years; height 147 - 193 cm (4' 10" - 6' 4")
Kid’s Bike Runner bike; age 2 - 5 years; height 85 - 110 cm (2' 10" - 3' 7")
12" wheel; age 2 - 4 years; height 85 - 100 cm (2' 10" - 3' 4")
14" wheel; age 3 - 5 years; height 95 - 110 cm (3' 1" - 3' 7")
16" wheel; age 5 - 7 years; height 110 - 120 cm (3' 7" - 4' 0")
20" wheel; age 7 - 9 years; height 120 - 135 cm (4' 0" - 4' 5")
24" wheel; age 9 - 11 years; height 135 - 145 cm(4' 5" - 4' 9")
26/27" wheel; age 11+ years; height 145+ cm (4' 9"+)
Trailer Cycle 20" wheel; age 3 - 5 years; height 95 - 110 cm (3' 1" - 3' 7")
24" wheel; age 5 - 9 years; height 110 - 135 cm (3' 7" - 4' 5")
Other types "One size": indicative height 148 - 193cm (4' 10" - 6' 4")
XS; height 147 - 155 cm (4' 10" - 5' 1")
S; height 155 - 165 cm (5' 1" - 5' 5")
M; height 165 - 175 cm (5' 5" - 5' 9")
L; height 175 - 183 cm (5' 9" - 6' 0")
XL; height 183 - 191 cm (6' 0" - 6' 3")
XXL; height 191 - 198 cm (6' 3" - 6' 6")

 

More Sizing Info

For more information you might want to read the sizing advice from a major online retailer, such as: