The THYS 222 Revolver with 2 x 20 inch wheels. A precursor of the 220 mm snek was the 178 mm snek on a 20 inch rear wheel. A desirable gear for really steep slopes like Calibier and L’Alpe d’Huez.
The new revolver shifting system was developed winter 2004-2005 and thoroughly tested before introduction. Thanks to the revolver system and plastic sneks, Dyneema® cord can replace the heavy steel propulsion cable. It is a real thrill to see a 28 gram Dyneema® cord bringing the heaviest testrider (well exceeding 100 kg) up the steepest mountains.
Picture: Martijn Mateman on Crete