This is a series of puzzle caches based upon the UCI World Tour. Each puzzle builds on the next and they will get increasingly more challenging as you progress through the series. The puzzles will lead to a trail of caches along official cycle routes and therefore are best done by bike. The caches are small and will not contain swaps but could cope with a small TB or geocoin.
Somewhere on Stage 9 of the 2015 Tour de Suisse the riders went through a roundabout. Niederwangen, Spiegel and Schliern are all signed at various exits. There is also a cycle route that goes through the roundabout. The number of the route is AB. If you pedalled your virtual bike NE from the roundabout you would have to be careful to avoid going faster than CD km/h or else you might break the speed limit.
Retired cyclist and keen geocacher Jens Voigt used to grab caches whilst riding on the world tour. Had Jens been riding the 2015 Tour de Suisse he could have grabbed GC1J2DD a couple of hundred metres from the finish line on Stage E although had he done so it probably would have resulted in him being outside the time limit for that stage. On stage F Jens could have grabbed GC5AJ7V and probably made it back into the peloton with a bit of drafting from the team cars and help from some of his team's domestiques.
Subtract (B+1)A from the Northing for stage 19.
Subtract EFC from the Westing for stage 19.
You can validate your puzzle solution with certitude.