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Bike Sizing Guide
Sizing Guide
General Guidance.
It is possible to ascertain a close approximation of the correct bike size required using the simple calculation below. However, please be aware of height, for example someone who is 6ft with a 30” inside leg versus someone who is 5ft with a 30” inside leg may need a larger frame because their body would be longer. The bigger the frame size, the longer the top tube.
The calculations that can be used to estimate your required frame size are below:
(N.B. All these measurements are a guide and Daycocks recommends that to get a proper idea of correct size it is best to physically sit on a bike at a local dealer).
Take the inside leg measurement to the floor. Subtract 3” for mountain bikes, or 1” for road bikes, then subtract 10” which is the average distance from the bottom bracket to the ground. This will then give the approximate frame size that will be needed.
Contained in the following tables are further guides for sizing on different types of cycles:
Racing Bikes
|
Size |
Measurement |
Approx height range |
Top tube length |
||
|
Small |
46.5cm |
5ft 3 – 5ft 6 |
535mm |
||
|
Medium |
50cm |
5ft 6 – 5ft 11 |
555mm |
|
|
|
Med/ Large |
53.5cm |
5ft 9 – 6ft |
570mm |
|
|
|
Large |
55.5cm |
5ft 11 – 6ft 3 |
585mm |
|
|
|
XL |
58.5cm |
6ft 3 – 6ft 7 |
610mm |
|
|
Hybrid/Trekking
|
Size |
Measurement |
Approx height range |
Top tube length |
|
XS |
48cm |
4ft 11 – 5ft 2 |
515mm |
|
Small |
51cm |
5ft 2 – 5ft 6 |
535mm |
|
Medium |
54cm |
5ft 6 – 5ft 11 |
555mm |
|
Large |
57cm |
5ft 11 – 6ft 3 |
575mm |
|
XL |
60cm |
6ft 3 – 6ft 7 |
595mm |
Mountain Bikes (Hardtail)
|
Size |
Measurement |
Approx height range |
|
XS |
14” |
4ft 11 – 5ft 2 |
|
Small |
17” |
5ft 2 – 5ft 6 |
|
Medium |
19” |
5ft 6 – 5ft 11 |
|
Large |
21” |
5ft 11 – 6ft 3 |
|
XL |
23” |
6ft 3 plus |
Mountain Bikes (Full Suspension)
|
Size |
Measurement |
Approx height range |
|
Small |
16.5” |
5ft 3 – 5ft 6 |
|
Medium |
18.5” |
5ft 6 – 5ft 11 |
|
Large |
20.5” |
5ft 11 – 6ft 2 |
|
XL |
22.5” |
6ft 2 plus |
Children’s Bikes
|
Wheel Size |
Age Range |
|
12” |
2-4 years |
|
14” |
4-5 years |
|
16” |
5-6 years |
|
20” |
5-7 years |
|
24” |
7-9 years |
If you have any further sizing enquiries please either call Daycocks Cycles on 0800 83 86 87 (Monday to Friday 09:00 – 17:00), or e-mail andrew@daycockscycles.co.uk.
