SQlab 611 ERGOWAVE Manuel De L'utilisateur page 41

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The seat stays of your SQlab ERGOWAVE ® saddle have a dia-
meter of 7 mm. Only use seat posts intended for round struts
with a diameter of 7 mm.
The seat stays of your SQlab ERGOWAVE ® saddle with carbon
braces have a high oval diameter of 7 mm x 9,6 mm. Only use
seat posts intended for upright oval struts with the diameter of
7 mm x 9,6 mm.
Warning
Never mount your SQlab Ergowave saddle with high oval
carbon struts in a seat post with lateral clamping.