島野新(?)十速電後變, RD-7970 - A

It appears Shimano has created a new 10-speed di2 rear derailleur (RD-7970-A) that uses e-tube rather than the old 5-pin dura ace connectors. It uses an additional junction box (SM-RD79-A) to convert from the old style connector (EW-7970) to the new e-tube connectors (EW-SD50).
~ by kulivontot

Photo token by Ritxis@weightweenie

7970是shimano幾年前的產品了...沒記錯好像是2009年的。


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剛剛google了一下,
2009年上市至2013年被9070取代
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