Prime PRIMAVERA - Head Tube Requirements; Headset Bearing Dimensions

52
+0.1
-0
3
0
-0.2
7.5
0
-0.2
42
+0.1
-0
Head Tube Requirements
Headset Bearing Dimensions
WARNING
Please note that it is important to check key measurements on the frame that the Prime headset is being fitted
to. Below diagram shows the key measurements required for all Prime headsets and must be followed. Failure
to match these measurements may cause premature failure to the headset bearings or failure of the frame
and void all warranty
WARNING
Please note that it is important to check key measurements on the your existing headset bearings before
fitting the Prime headset. Below diagram shows the key measurements required for all Prime headsets and
must be followed. Failure to match these measurements may cause premature failure to the headset bearings
or failure of the frame and void all warranty.
Measurements (MM/DEG) Headset Standard
Model Upper Bearing Lower Bearing Outer Diameter Depth Outer Angle Inner Angle Outer Diameter Depth Outer Angle Inner Angle
Primavera Low Stack 6.5 7
Primavera Medium Stack 6.5 7
Doyenne Medium Stack 8 7
51.8
Upper Bearing
Lower Bearing
IS42/28.6 IS52/39.8 41.8 45° 45° 45° 45°
5
Depth
Inner
Angle
Outer
Angle
Please note: Bearing measurements can sometimes be found printed on the bearing in roughly the highlighted zone.