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, AGang, Airborne, Altrix, American Eagle, Arrow, Atlanta, Author, Avanti, Barracuda, Beone, Bergamont, BH, Bianchi, Blue, BMC, Boardman, Bottechia, Brave Machine, Brodie, B´Twin, Bulls, Canyon, Carrera, Centurion, Cinelli, Claud Butler, Coluer, Commencal, Corratec, Crescent, Cube, Cyclewolf, Cyco, Da Bomb, Dahon, Dartmoor, Dawes, DBS, Decathlon, Diamant, Diamondback, Drössiger, Dynamics, Element, Epple, Evoke, Falcon, Falter, Fat Bike, Fausto Coppi, Felt, Fetish, Flanders, Focus, Fort, FRW, Fuji, Ghost, Gitane, Go Sport, Gudereit, Haibike, Haro, Hasa, Hercules, Ideal, Intec, Iron Horse, Jan Janssen, Jeep, K2, Kalkhoff, Kawasaki, Kellys, Kettler, KHS, Kildemoes, Koga, Koga Miyata, Kona, KSM, KTM, La Strada, Lakes, Lapierre, Leader Fox, Marin, Masi, Massi, MBK, McKenzie, Megamo, Merida, Mongoose, Motiv, Muddy Fox, Müsing, Nakamura, NeilPryde, Next, Nishiki, Norco, Novara, On One, Optima, Orange, Orbea, Pinarello, Planet X, Proflex, Qbike, Quantec, Raleigh, Red Bull, Redline, RIH, Roba, Rock Machine, Rockrider, Rocky Mountain, Rose, Salsa, Saracen, Schwinn, Scott, Scrapper, Sensa, Shogun, Simplon, Sinus, Staiger, Steppenwolf, Stevens, Superior, Tallard, Thompson, Torpado, Transition, Trek, U.Scanini, Univega, Van Dessel, Vario, Venzo, Villiger, Viner, Viper, Vitus, Voodoo, VSF bikemanufaktur, Wheeler, Wilier, Winora, Yazoo.