How to determine the right bike size

Cycling is one of the most popular outdoor activities in the world. Everyone probably wears out a few bikes in their lifetime. But when you buy a bike, it's important to find the right size right away. Choosing the right frame size is crucial to a good cycling experience! Do you know how to determine the right bike size?

Cycling enjoyment depends on the right frame size. If the frame is too big, the handlebars may be too far away and if the frame is too small, the saddle may not be high enough. To have control over your bike and to prevent physical complaints during and after cycling, it is important to choose the right frame size.

Calculating the bike size

      1. Take off your shoes and stand between 15-20 cm from your knees.
      2. Measure the height of the crotch from the ground down.
      3. Make sure you know what kind of bike you want: mountain bikes, city bikes, road bikes. In our previous blog we explained the difference between all the different types of bikes.
      4. Grab your calculator and calculate the correct result.
        It is best to round down.

City bike - inseam (cm) x 0.685 = The size of your frame.
Mountain bike - inseam (cm) x 0.66 = The size of your frame.
Road bike - inseam (cm) x 0.70 = The size of your frame.

Example: Let's take an inner leg length of 76 cm. This means: City bike: 76 x 0.685 = 52.06.
Mountain bike: 76 x 0.66 = 50.16Road bike: 76 x 0.70 = 53.2.

Not really a fan of math? No worries! We have attached a graph for each bike. Please note that the result may be slightly different from reality. These graphs are an indication. After all, not everyone has the same legs.

City bike (also suitable for hybrid bike) size chart

Length (cm)

Inseam length (cm)

Height (ft/in)

Inseam length (inches)

Suggested frame size

Size frame 

147 – 155 cm

61 – 73 cm

4’10’’ – 5’1’’

24 – 29’’

13 – 14’’

(XS)

155 – 165 cm

63 - 76 cm

5’1’’ – 5’5’’

25 – 30’’

15 – 16’’

(S)

165 – 175 cm

66 – 78 cm

5’5’’ – 5’9’’

26 – 31’’

16 – 17’’

(M)

175 – 183 cm

68 – 81 cm

5’9’’ - 6’0’’

27 – 32’’

17 – 18’’

 

(L)

183 – 190 cm

71 – 83 cm

6’0’’ – 6’3’’

28 – 33’’

18 – 19’’

(XL)

190 – 200 cm

73 – 86 cm

6’1’’ – 6’6’’

29 – 34’’

19’’+

(XXL)

 

 

Mountainbike size chart

Length (cm)

Inseam length (cm)

Height (ft/in)

Inseam length (inches)

Suggested frame size

Suggested wheel size

147 – 160 cm

62 – 70 cm

4’10’’ – 5’3’’

25 – 28’’

13 – 14’’

26’’

160 – 170 cm

63 - 76 cm

5’4’’ – 5’7’’

25 – 30’’

15 – 16’’

26’’

165 – 175 cm

66 – 78 cm

5’5’’ – 5’9’’

26 – 31’’

16 – 17’’

27,5’’

175 – 183 cm

68 – 81 cm

5’9’’ - 6’0’’

27 – 32’’

17 – 18’’

 

27.5

183 – 190 cm

71 – 83 cm

6’0’’ – 6’3’’

28 – 33’’

18 – 19’’

29’’

190 – 200 cm

73 – 86 cm

6’1’’ – 6’6’’

29 – 34’’

19’’+

29’’

 

 

 

Road bike size chart

Height (cm)

Height (ft/in)

Suggested frame size

Size*

148 – 152 cm

4’10’’ – 5’0’’

47 – 48 cm

(XXS)

152 – 160 cm

5’0’’ – 5’3’’

49 – 50 cm

(XS)

160 – 168 cm

5’3’’ – 5’6’’

51 – 52 – 53 cm

(S)

168 – 175 cm

5’6’’ – 5’9’’

54 – 55 cm

 

(M)

175 – 183 cm

5’9’’ – 6’0’’

56 – 57 – 58 cm

(L)

183 – 191 cm

6’0’’ – 6’3’’

58 – 59 – 60 cm

 

(XL)

191 – 198 cm

6’3’’ – 6’6’’

61 – 62 – 63 cm

(XXL)

* Please note that frame sizes from XXS to XXL do not have the same meaning for every manufacturer. These sizes indicate (as on clothing) the sizes of current models.

No matter what type of bike you have, want to buy or are about to buy: the Stasdock bike mount is suitable for all bikes. Even the size of the bike doesn't matter: its grip and strength will keep any bike in place.