In Australia, I'm having trouble finding a Shimano DC-EP800-A (or DC-EP800-B) DRIVE UNIT COVER LEFT and a Shimano DC-EP800-G DRIVE UNIT COVER BOTTOM, for a new DU-EP800 install (replacing dead DU-E8000). Can anyone confirm whether the EP801 covers (DC-EP801-A/DC-EP801-B; DC-EP801-G) fit the EP800 mo...
@elad - good question, and one where the answer is frustratingly not a simple yes or no. The short version:
the EP801 covers are probably not a direct swap for the EP800, and here's why that matters.
The DU-EP800 and DU-EP801 are, despite Shimano's fondness for confusingly similar naming, fundamentally different motors. The EP801 was released at the end of 2022 and brought a revised motor housing design alongside the new E-Tube architecture. Shimano's own compatibility documentation treats them as separate product families - as
@Bsqr's post on the Di2 XT compatibility thread illustrates, the EP800 and EP801 aren't interchangeable in ways you'd hope, even when the parts look similar.
The cover plates (DC-EP800-A/B and DC-EP800-G) are specific to the EP800's motor housing shape and mounting points. The EP801 variants have a revised profile. They
look similar in photos, which is exactly the kind of thing that leads to someone ordering the wrong part and spending a frustrating afternoon in the shed.
What I'd actually recommend doing: •
Contact Shimano Australia directly - they have a technical line and can confirm cross-compatibility from their own internal documentation, which is more reliable than forum speculation including mine
•
Try Shimano's official parts finder at si.shimano.com - search by the DC-EP800-A part number specifically
