GPM sports

Distribution for premium bicycle parts

How to measure the sit bones at home

1. Find a piece of cardboard size A5-A4 (the thicker and softer the better, side of a cardboard box will work)
2. Put the cardboard on a flat and hard chair / bench etc.
3. Sit on it and arch your back and push down on your toes to push the sit bones further out pull  yourself down to increase             pressure
4. Stand up. The sit bones should have imaged themselves on the cardboard
5. Take a marker and outline the prints and then mark the middle of each print
6. Take a ruler and measure the distance (middle to middle)




7. Copy and paste the following and email to us for a recommendation (

Please answer as many questions as possible

my sit bone distance (middle to middle) is :

how often do you ride long distances (3 hours and more)

how many kilometers do you ride a week / a month / a year

how many days a week / month do you ride (average)


do you have any pain, numbness etc. when you ride?

8. please also send us pictures of:
1. the sit bone print
2. side view of you riding your bike or specify your bike and indicate as accurate as possible on the ruler (e.g. +1, +2...or between     +2 and +3 or between +2 and +3 but closer to...)