Anyone know the size of the rear axle? I just need the diameter thank you!

For the old gen:
Both bearings (6203 and 6303) have interior diameter of 17 mm.
The thread is M16.

For the old gen:
Both bearings (6203 and 6303) have interior diameter of 17 mm.
The thread is M16.

Does anyone know what the size is for 2008 ?
I measured it using a pair of calipers and it looks like it's 17mm but I cannot find any documentation that can confirm this.

If you measured it and it was 17mm, then why not trust that? It makes sense that the shank is 17mm to fit the bearing IDs, and the thread M16. What does the caliper read if you measure the outside diameter of the threads?

If you measured it and it was 17mm, then why not trust that? It makes sense that the shank is 17mm to fit the bearing IDs, and the thread M16. What does the caliper read if you measure the outside diameter of the threads?

Outside is like 17.01 - 17.03mm

That’s correct. I just measure mine last month to have titanium one made.