SK47B #altershark Chainring: 47T, 7075/T6,Full CNCBCD:144mmColor:BlackWeight:156g Made in Taiwan.http://alter.shoplineapp.comWorldwide_shipping. #ALTERCHAINRING #track #pista #bicycle #trackbike #fixie #njs #알터체인링 #알터 #자전거 #픽시 #自転車 #ピスト #競輪 #fixedgear #Taiwan #場地車 #chainring #chainrings(在 Taiwan)https://www.instagram.com/p/Cc-3tbYPQlm/?igshid=NGJjMDIxMWI=