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Privacy Overview
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Calculate your bike size
The basis for calculation is the inseam, from the ground to the crotch. Place your feet about 15cm apart. Measurements are taken without shoes and in close-fitting trousers (e.g. cycling shorts) or underwear. To do this, push a lath between your legs up to your crotch. Now measure the distance from the floor to the top of the lath. This is the inseam you need for further calculation.
Choose the bike size closest to this calculation. Intended use: Are you going to cycle sportily or recreationally? When in doubt, choose the smaller frame for sporty riding and the larger one for long leisurely rides.
Enter your inseam to calculate your bike size.
* We are not responsible for a wrongly ordered size based on this calculation.
If in doubt, consult a Thompson dealer.
Inseam is the distance from your crotch to the ground.
You now know approximately the suitable frame height (seat tube length) for your new bike. What frame size your bike should be is also influenced by other factors:
Arm length and shoulder width: These measurements also play a role in determining the frame size.
Desired sitting position: Sporty or comfortable? This will also influence your choice.