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Customer Service |
Frame Calculation |
1. Calculating the right step length (step height)
Organise the right measuring instruments first of all. Ideally you will need a folding rule and a spirit level. If you do not have a spirit level to hand, you can use a book instead.
Now take off your shoes and clothes right down to your underwear. This is because the cut of your trousers can have too great an influence on the result.
Should you have a spirit level to hand, pull it up horizontally between your legs (see diagram). This works just as well with a book, but you should then stand against a door or wall so that the top edge of your “measuring instrument” is precisely parallel to the floor.
IMPORTANT: Measure right up to the VERY TOP. Only by calculating the distance between the floor and the top edge of the spirit level or the book correctly can your optimum frame height be best calculated. If possible, ask someone else to help you read off the measurements.
The measurement that you read off is your so-called step length (step height).
2. The right size of Hard tail mountain bike
With a Hard tail mountain bike, the step height is multiplied by 0.226 to calculate the theoretical frame height in inches. One inch equals 2.54 cm.
If the theoretical figure lies between two sizes, then the following rule of thumb should apply:
- for racing/athletic riding, take the smaller frame height
- for touring-based riding, take the next frame height up
| Body height | Frame size | (corresponding to approx.) |
|---|---|---|
| 155 - 165 cm | 14 - 15" | 35 - 38 cm |
| 165 - 170 cm | 15 - 16" | 38 - 41 cm |
| 170 - 175 cm | 16 - 17" | 41 - 43 cm |
| 175 - 180 cm | 17 - 18" | 43 - 46 cm |
| 180 - 185 cm | 18 - 19" | 46 - 48 cm |
| 185 - 190 cm | 19 - 21" | 48 - 53 cm |
| 190 - 195 cm | 21 - 22" | 53 - 56 cm |
| 195 - 200 cm | 22 - 23" | 56 - 58 cm |
3. The right size of your full suspension bike
With a full suspension bike, multiply the step height by 0.225 to calculate the theoretical frame height in inches. One inch equals 2.54 cm.
If the theoretical figure lies between two sizes, then the following rule of thumb should apply:
- for racing/athletic riding, take the smaller frame height
- for touring-based riding, take the next frame height up
| Body height | Frame size | (corresponding to approx.) |
|---|---|---|
| 155 - 165 cm | 14 - 15" | 35 - 38 cm |
| 165 - 170 cm | 15 - 16" | 38 - 41 cm |
| 170 - 175 cm | 16 - 17" | 41 - 43 cm |
| 175 - 180 cm | 17 - 18" | 43 - 46 cm |
| 180 - 185 cm | 18 - 19" | 46 - 48 cm |
| 185 - 190 cm | 19 - 21" | 48 - 53 cm |
| 190 - 195 cm | 21 - 22" | 53 - 56 cm |
| 195 - 200 cm | 22 - 23" | 56 - 58 cm |
4. The right size of your road bike
With a road bike, multiply the step height by 0.665 to obtain the theoretical frame height in cm. The frame height is approx. 3.5 – 5 cm lower with triathlon frames.
Important: The figure obtained relates to the German measuring method!
If the theoretical figure lies between two sizes, then the following rule of thumb should apply:
- for competition riding, take the smaller size
- for racing/athletic riding, take the next size up
| Body height | Frame height Road bike | Frame height Triathlon bike |
|---|---|---|
| 155 - 165 cm | 48 - 51 cm | 46 - 48 cm |
| 165 - 170 cm | 51 - 53 cm | 48 - 50 cm |
| 170 - 175 cm | 53 - 55 cm | 50 - 52 cm |
| 175 - 180 cm | 55 - 57 cm | 52 - 55 cm |
| 180 - 185 cm | 57 - 60 cm | 55 - 56 cm |
| 185 - 190 cm | 60 - 62 cm | 57 - 60 cm |
| 190 - 195 cm | 62 - 64 cm | 60 - 62 cm |
| 195 - 200 cm | 64 - ? cm | 62 - ? cm |
5. The right size of your touring, hybrid, cyclo cross and city bike
With touring, hybrid, cyclo cross and city bikes, multiply the step height by 0.66 to obtain the theoretical frame height in cm. If the step height is multiplied by 0.259, this produces the theoretical frame height in inches. One inch equals 2.54 cm.
If the theoretical figure lies between two sizes, then the following rule of thumb should apply:
- for racing/athletic riding, take the smaller frame
- for touring-based riding, take the larger frame
- with suspension saddle pins, deduct approx. 4 cm (approx. 2 inches) from the theoretical size
| Body height | Frame height |
|---|---|
| 155 - 165 cm | 47 - 50 cm |
| 165 - 170 cm | 50 - 52 cm |
| 170 - 175 cm | 52 - 55 cm |
| 175 - 180 cm | 55 - 58 cm |
| 180 - 185 cm | 58 - 61 cm |
| 185 - 190 cm | 61 - 63 cm |
| 190 - 195 cm | 63 - 66 cm |
| 195 - 200 cm | 66 - ? cm |
6. The right size of your children’s bike
Children’s bikes are not based on the step height but on the height of the child. Moreover, children’s bikes are not purchased according to the frame height in cm but according to the size of the wheels in inches.
| Body height | Wheel size in inches |
|---|---|
| 85 - 115 cm | 12" |
| 100 - 115 cm | 16" |
| 110 - 125 cm | 18" |
| 115 - 140 cm | 20" |
| 130 - 155 cm | 24" |
7. The right size of monocycle:
The length of your leg is critical when selecting the right size of monocycle. A larger wheel is easier when learning to monocycle. A larger wheel is easier to stabilise, whereas a smaller wheel diameter is more manoeuvrable.
The correct saddle height:
Stand the monocycle adjacent to your hips and adjust the saddle height to the top of your hipbone.
The following rules of thumb apply:
- opt for the larger size for normal cycling
- opt for the smaller size for artistic cycling
| Leg length | Cyclist | Wheel size in inches |
|---|---|---|
| 56 - 73 cm | Children aged from 5 to 7 | 16" to 18" |
| 62 - 82 cm | Young people aged from 8 to 13 | 20" |
| 67 - 87 cm | Young people aged from 12 to 16, adults | 24" |
| 72 - 92 cm | Adults | 26" |
