http://cycle.shimano.co.jp/content/sic-bike/ja/home/components1/road/sora-r3000.html
http://bike.shimano.com/content/sac-bike/en/home/components11/road/claris-r2000.html

※過去スレ
【9速】SORA CLARIS de【8速】
http://tamae.2ch.net/test/read.cgi/bicycle/1417174398/
【9速】SORA CLARIS part2【9速】
http://tamae.2ch.net/test/read.cgi/bicycle/1464856621/
【9速】SORA CLARIS part3【8速】
http://tamae.2ch.net/test/read.cgi/bicycle/1481659559/