Sigma Sport BC1200 bicycle computer instructions
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The four page instruction sheet miniaturized to a single page so you can take it with you on your next motorcycle trip. For what it is worth, the nearly new 100/90-18 Bridgestone S11 Spitfire Touring front tire on my Ambassador works out to be a wheel size (WS) of 1208.
![Sigma Sport BC1600 wheel size chart and calculations.](mg_images/sigma-bc-1600-page14.png)
Photo courtesy of Google images.