Commencal hanger singlespeed bike sparesgenuine commencal hanger singlespeed is stronger stiffer and will allow your rear derailleur to shift more effectively and is sometimes preferred for strength and simplicity especially for those riders who are looking to take care of their bikes produced from commencals own design team commencal hanger singlespeed specifications right side hanger for single speed for all absolut alu 2007 to 2009 right side hanger for single speed for all absolut crm