Product Description Technical Information:Material (cage):aluminium (6061)Material (derailleur pulleys):aluminiumThickness (derailleur pulleys):2.25 mmBearings (derailler pulleys):cartridge bearings, sealedChainline:19 - 27 mmSprocket (max.):20-toothFeatures:enables the use of single-speed rear wheels on frames with vertical dropoutsensures optimum chain tension in conjunction with chainrings with a maximum of 20 teethspacers facilitate adjustment for the optimal chainlinederailleur pulleys have slight lateral play to compensate for slight deviations in the chainline2.25 mm thick derailleur pulleys fit a wide range of chains - also for 1/8" single-speed chainsManufacturer Numbers:black:PC200BLACKsilver:PC200SILVERContents:1 x Weight: black: 76 g Manufacturer: PAUL Component Engineering 11204 Midway Chico CA 95928 USA info@paulcomp.com Distributor: Cosmic Sports GmbH Leyher Straße 47 90763 Fürth Germany info@cosmicsports.de