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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.