Vision Metron 55SL through-axle FRONT HUB overhaul and bearing choice

I ride 2020 Merida Reacto bicycle with a Vision Metron 55SL factory wheel set. The bike has clocked 16 thousand kilometers (or 10 thousand miles). Recently, the front hub has been making noise and asking for some service. Sadly, there is not much supporting documentation on these Vision hubs. In this video we look what is inside the hub, how to access the bearings, how to take the hub apart and assemble it back. The hub uses a pair of 17287 bearings. Also referred as 17x28x7mm or 28x17x7mm. Original Vision bearing reference is MR219. We also consider what bearings to choose if you can't get the original.

Vision's video (quite old) on PRA (preload reduction assembly) system:
-    • Vision Wheels - How the PRA System Wo...  

Find and follow me on:
- STRAVA   / strava  
- Instagram   / zavyalov_cycling  

Filmed with:
- Sony A7S3

Contents:
0:00 - The story
0:32 - The hub type
0:48 - The preload cap of PRA system
1:01 - The hub construction
1:41 - Disassembly of the hub
2:21 - Another way of disassembly
3:21 - The hub axle
3:55 - An important note on the spacer
4:19 - Preload adjustment with PRA (preload reduction assembly)
5:25 - OZ Cycle video reference
5:56 - Bearing choice
6:20 - The used MR219 Vision bearing from the hub
7:04 - The new Vision MR219 Vision bearing
8:06 - The "no name" 17287 bearing from Amazon
9:02 - Conclusion

References:
- Merida Bikes ‪@MERIDABIKES-INT‬
- OZ Cycle ‪@stevenleffanue‬
​- Vision Tech ‪@Vision_Tech_Usa‬

#cycling #hub #bearing