This looks pretty much like the first mountain bike I had somewhen late 80s early 90s. Kettler Aluminum Rad | Vintage mountain bike, Mountain biking, Bike
KETTLER QUADRIGA TOWN & COUNTRY COMP C2 review | E-MOUNTAINBIKE Magazine
Mountainbike, Kettler Alu Edition, 26", Rahmengröße 57 in Baden-Württemberg - Dietenheim | Herrenfahrrad gebraucht kaufen | eBay Kleinanzeigen