The derailleur hanger for frames are designed to bend or break, in order to avoid damage to the frame that would be more expensive. Therefore these dropouts are made of 6061 aluminum.Suitable for following frame manufacturers: 4Ever, American Eagle, Apollo (Australia), Atlanta, Author, Batavus, Beone, Bergamont, BH, Bianchi, Bike Manufaktur, Blue, BMC, B´Twin, Bulls, Carrera, Centurion, Checker Pig, Cinelli, Claud Butler, Coluer, Corratec, Crescent, Cube, Cyclewolf, Cyco, Da Bomb, Dahon, Dartmoor, Dawes, DBS, Decathlon, Diamant, Diamondback, Drössiger, Electra, Evoke, Falcon, Falter, Fat Bike, Felt, Fetish, Flanders, Focus, Fuji, Gary Fisher, Gazelle, Ghost, Giant, Gitane, Go Sport, Haibike, Haro, Hasa, Hercules, Intec, Iron Horse, Jamis, Jan Janssen, Jeep, Kellys, KHS, Kildemoes, Klein, Kona, Koxx, KSM, KTM, Kuwahara, La Strada, Lapierre, Leader Fox, Marin, Massi, Maxcycles, Maxx, MBK, Megamo, Merida, Mondraker, Mongoose, Morewood, Motobecane, MSC, Muddy Fox, Müsing, Nakamura, Norco, Novara, Optima, Peugeot, Planet X, Qbike, Raleigh, Redline, Rock Machine, Rockrider, Salcano, Saracen, Schwinn, Scrapper, Sensa, Sinus, Specialized, Spike, Staiger, Stevens, Sunn, Superior, Tallard, Thompson, Trek, U.Scanini, Univega, Van Dessel, Vario, Vektor, Ventana, Villiger, Vision, Vitus, Voodoo, Wheeler, Wilier, Winora.