The two white leg length shim sizes are adequate for most leg length issues.
You would never place 1cm of shims under a 1cm shorter leg – this is too extreme for the body to adjust to. The settings are always as least invasive as possible e.g. 8 mm longer right leg, 2.0mm shim may suffice to give you an adequate effect.
The following table is an average case estimation based on our work with over 2000 elite and sub-elite athletes. If you feel that the shim advised below is not suited to your individual case then please contact your health care professional for further advice.
Measured Leg Length Discrepancy | CustomShim Indicated |
1 - 4 mm | 1.0 mm |
4 - 8 mm | 2.0 mm |
8 - 15mm | 1.0 + 2.0
= 3.0mm stack" |
15mm + | Multiple shim packs needed |
Shim choice will be dependent on the cause and effects of the large discrepancy, guides are only relative and based on our consulting experience fitting these.
To measure the effect of your shim choice it is advised you are re-measured on the erg/in-boat from the base footboard up to your hips as well as looking at video again to identify any changes. Relying on your own body feedback is also useful.
Like any boat rigging change, the effects will take time to get used to and will become clearer with more use.
Click here to learn more about leg length discrepancies.
Click here to view some basic leg length assessment methods.
Click here to view more detailed methods of assessment.