HG-EV鍊條&飛輪，鍊條寬度變窄取消7900/6700/5700/4600的單向鍊條設計
齒片寬度還是保持不變，這一定要的喇
所以不要在癡心妄想10s-11s混搭
http://cycle.shimano.co.jp/publish/content/global_cycle/ja/jp/index/enjoy_knowledge/m_function/a-line/slr-ev.html
夾器:SLR-EV 改變承軸的位置，增進剎車的手感
不知道會不會下放到ULTEGRA，到時候撿一組可以跟ST-7900搭
http://cycle.shimano.co.jp/publish/content/global_cycle/ja/jp/index/enjoy_knowledge/m_function/sa-line/new_innner_cable.html
內(鋼纜)線:(包含剎車及變速線)新的塗層，增加滑順度
另外纜線固定當方式、後變進線的角度也都有所改變
http://cycle.shimano.co.jp/publish/content/global_cycle/ja/jp/index/enjoy_knowledge/m_function/a-line/optbal.html
輪組:後輪2:1編法，沒啥好說了。不過只有C35以上才有歐，DA-9000 C24 SORRY搂
http://cycle.shimano.co.jp/publish/content/global_cycle/ja/jp/index/enjoy_knowledge/m_function/ta-line/d2_rim.html
D2輪版新構造，減少側風造成的阻力及渦流的產生
http://friendsyokai.co.jp/archives/6561
變煞把方面，半檔、外管的套頭也有進步
