Bontrager Aeolus 3 D3 Bearing

I purchased a set of these wheels online 2nd hand and while they’ve been really good to use, servicing them have been a nightmare and has cost me a lot more than what I have imagined.

After winning them on Ebay for just over a $1000 I used them on a Gran Fondo with a few steep climbs, they did their job even if my legs were not exactly up to the task. I noticed one day that the bearings we’re a bit rough so I decided to have them replaced by an owner-operator bike mechanic. He was able to replace the front and the rear hub bearings, unfortunately the rear hub stopped freewheeling once it was mounted on the bike.

I returned the wheel back to him and we decided to put the old bearings back to see if that made a difference, according to him they should be working as they were the same part numbers. So $120 later, I’m pretty much back at the beginning. While the front bearings were replaced with a new set, they didn’t actually need it.

I decided to have another mechanic look at it as the hub didn’t look like it was sitting flush against the cassette. We found the hub seal was not seated correctly on the hub body and we needed a special DT Swiss tool to fit it. Not only did we find this issue, but the freehub bearings were completely shot and needed replacement. New Shimano 11 speed DT Swiss Feehub $119.99

The DT Swiss service tools are roughly $300USD and there was no way I was going to pay that much to have a hub seal reseated properly. I found a aluminium DT Swiss rear hub service tool kit from US Ebay which cost me $80 shipped to Sydney.

After getting the new freehub and the new tools to seat, it was taken back to the mechanic again to rebuild. Last night I rode the bike as well as riding 160km last weekend. The wheels felt like they were rubbing and wasn’t coasting as well as they should have been. So now we go back to what feels like the start.

According to the Trek’s documentation, I require the following bearing set.


If I’m going to fix this once and for all, I want to make sure that I have the correct parts i.e bearings, spacers, etc…

Considering HSC ceramic bearings at the moment and have contacted them to confirm which bearings I need for these

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