Bontrager Rapid Drive 108 hub bearings?

From what I can make out from your description, and Trek's tech site, they are 6903.

The wheelset is Kovee Comp with a Rapid Drive108 engagement point Boost Hub.

I'm not overly impressed as its only done around 800km in the dry and the rear hub bearings are finished.

I guess the only way to be sure is to take it apart but i wanted to order the bearings from work today

I'm pretty sure they're 6903 in the rear hub - I'll check when I get into work tomorrow if I remember. The stock bearings they use seem to be made of cheese and go bad pretty quickly, the Enduro bearings I replaced them with are lasting much better.

Click on the service tab of this page, that the info you need?

https://www.trekbikes.com/gb/en_GB/equipment/cycling-components/bike-hubs-and-hub-parts/bontrager-rapid-drive-108-boost-rear-hub/p/39269/?colorCode=black

I’ve got kovee elite on the ebike, hoping I’ll fair ok with bearings.

Thats it!

thanks - must have missed that as i landed on that page once.

Thats useful as one of my other bikes has 6903 and so i already have some spares and the right tool!