Originally Posted by
Tourist in MSN
My watch has a circular slide rule, but the print is so small I can't use it without a magnifying glass. No, I do not try to use it while riding a bike.
i will say since i have hub dynamos on all my wheels i have never had a slide rule quit working. truthfully i use the dynamos for lights only. they are always on as i ride almost everywhere and at least once a week at night. cant imagine being without them now.