DT SWISS SPLINE ROAD 2015 RC 28 Technical Manual page 19

3. Clamp the axle with the special strap into the vise.
4. Unscrew the end cap and remove it.
 20 mm, 15 mm und 9 mm end caps:
22 mm open-end wrench
 QR end caps: 5 mm Allen key
5. Remove the bearing from the axle.
Assembling Bearings and Axle
1. Slightly grease the seating of the bearings and the
inner surface of the hub shell using multipurpose
grease.
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SPLINE Wheels - Technical Manual 18