Our guide, having many years of cycling experience, told us that particarly these weatherconditions are the cause of many knee-problems racing cyclists suffer from. Because you think it's warm enough to ride in shorts, the knees are remaining too cold during the day which may cause rheumatic complaints in the years to come.
Keeping this in mind I actually bought a pair of knee-pieces, just to wear them while cycling in this time of the year when Spring just peeks around the corner.
Is it usefull, such a bell? Well, when you are about to start your weekly workout tour and want to now from which direction the wind is blowing, it is. Otherwise, when your cycling a multiple days trekking tour, I doubt that, because in that case you've allready planned basically the route. But when cycling a daily tour starting from your home, it can be usefull to adjust your route to have tailwind on your the last leg back home.
Each year the starting of a new season is a bit of a mystery to me on what level my condition stand. I don't cycle indoors during Winter, so I have a bit of a set back in Spring to other cyclists who train on their spinning bikes during the cold months. I just try to ride as much as I can outdoors during Winter. Gives me more stamina and joy, especially when I can follow cyclist about half of my age from which I know they've trained all Winter in the gym on a spinning course.