Close-up of a black plastic adjustment knob or mounting cap with a textured surface and angled profile, shown from the side on a light grey background. The component features a central opening and a cylindrical base designed for attachment to compatible bicycle or mechanical assemblies.

EW-GM300-M GROMMET M 7.5X8

$2.00
$2.00
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Close-up of a black plastic adjustment knob or mounting cap with a textured surface and angled profile, shown from the side on a light grey background. The component features a central opening and a cylindrical base designed for attachment to compatible bicycle or mechanical assemblies.
  • Close-up of a black plastic adjustment knob or mounting cap with a textured surface and angled profile, shown from the side on a light grey background. The component features a central opening and a cylindrical base designed for attachment to compatible bicycle or mechanical assemblies.
  • Close-up of a black plastic adjustment knob or mounting cap with a textured surface and angled profile, shown from the side on a light grey background. The component features a central opening and a cylindrical base designed for attachment to compatible bicycle or mechanical assemblies.
EW-GM300-M GROMMET M 7.5X8

EW-GM300-M GROMMET M 7.5X8

Y7HN02000
$2.00
$2.00

The Shimano EW-GM300-M Di2 Grommet (7x8 mm) is a precision rubber insert designed to securely hold Shimano Di2 EW-SD300 electric wires in your bike frame. Installed directly into the frame’s cable entry ports, this grommet ensures a snug, vibration-free fit while protecting your electronic wiring from chafing, movement, and long-term wear.

Specifically engineered for modern Shimano Di2 systems, the EW-GM300 provides a clean, professional internal routing finish while improving durability and protecting your frame’s cable ports. Quick and easy to install, it’s an essential small component that ensures reliable electronic shifting performance.

If you're upgrading to Shimano 12-speed Di2 or maintaining your internal routing setup, this genuine Shimano grommet keeps your system secure and protected.

  • Designed for Shimano Di2 systems
  • Compatible with EW-SD300 electric wires
  • Frame hole size: 7 x 8 mm
  • Securely holds internal Di2 wiring in place
  • Prevents cable chafing and frame damage
  • Durable rubber construction
  • Quick and easy installation
  • Clean and professional internal cable routing finish

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