Shimano EW-SD300-I is a 350mm electric (E-Tube) wire for 12-speed Di2 electronic groupsets, supplied in the "-I" version for internal frame routing with wire holders to stop the cable shifting inside the frame. It uses the compact SD300 connector and cannot be cut or shortened — the connectors are moulded to each end.

Fits

  • Shimano Di2 / E-Tube systems using the SD300 (EW-SD300) connector
  • Connects SD300-compatible Di2 components to one another (350mm run length)
  • Older Di2 series require the EW-AD305 adapter to use SD300 wires
Covered by Shimano's spare-parts warranty against manufacturing defects. For any warranty claim or fitment assistance, return the item to Tune Cycles and we'll handle it for you.
  • 350mm Di2 E-Tube electric wire with moulded SD300 connectors (cannot be cut)
  • "-I" internal-routing version — supplied with wire holders to secure the cable inside the frame
  • Compact SD300 design: approx. 2.1mm wire diameter, 3.2mm plug
  • For Shimano 12-speed Di2 / E-Tube systems using SD300 connectors (EW-AD305 adapter needed for older Di2)
Part numberEW-SD300-I (350mm)
TypeDi2 E-Tube electric wire, SD300 connector, internal routing
Length350mm
Wire / plug diameterapprox. 2.1mm wire / 3.2mm plug
FitsShimano Di2 / E-Tube components using SD300 connectors
IncludedElectric wire plus wire holders for internal routing
SKU SHM-IEWSD300IL035
Barcode # 4550170635275
Brand Shimano

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