*Free shipping on orders over $99

Free Shipping Policy

Free Shipping applies to all orders placed for $99 and above
(pre-tax value). Some restrictions apply:

  • Offer valid in the Lower 48 States only
  • Excludes Complete Bicycles, Framesets, and some other oversize items
  • Excludes certain sale items


Equipment > Components > Brake Levers > Electronic Supplies


With the change from Shimano's SD50 Di2 e-Tube wiring system to the slimmer, lower profile SD300 series released with 12-speed Dura-Ace R9250 series Di2 components the port and plug interface was made smaller. For some specific situations, such as connecting and SD50 from an 11-speed TT lever or brake level set-up to the SD300 series wiring or battery you will need this EW-AD305 Conversion Adapter. It also has e-bike applicability with the EP-8 / EP-800 Shimano motor/wiring systems. Each adapter has one SD50 port on one side and one SD300 port on the other, inline.

Return to Top

  • Conversion adapter for use with one SD300 and one SD50 Di2 e-Tube wires
  • Spans the two generations of e-Tube wires
  • Has inline ports for SD50 and SD300
  • Color: Black:
  • Weight: 5 grams
Return to Top