WOOdman Axis Cannondale SI 50.8 Headset

Cannondale® Headshock-SI headset upgraded. For 50.8mm headtube for 1.5 straight fork. EC51-SI/38.1 EC51-SI/40
Shipping Policy

WOOdman Axis Cannondale SI 50.8 Headset is designed for Cannondale SI frames with external cups, which have a cup outer diameter of 50.8mm. It is compatible with Cannondale Headshok headtube and allows for the use of 1.5" straight forks.

*Please note that this is not compatible with a 1.56" Headshok steerer.

The package delivered with WOOdman SGC Crown Race, Position Specific Bearings, and SP Height Adjustment Plate. This is No Specific Tool Design, easy to install.

MATERIALS: CNC-machined 6061 T6 Aluminum


  • S.H.I.S Top:EC51-SI/38.1
  • S.H.I.S Bottom:EC51-SI/40
  • Fork Steerer:Straight 1.5"
  • Top Bearing:WOOdman X45°/45°  (52 x 7mm)
  • Bottom Bearing:WOOdman X45°/45°   (52 x 7mm)
  • Stack Heights: Top 14.8mm /Bottom: 12.6mm
  • Crown race:40mm
  • Compatible with Cannondale® Headshock-SI headset(50.8mm headtube) for 1.5 straight forks.




FL Cap is a WOOdman lightweight design. The latest Torx screw is made of 7075 aluminum, which is lighter and has better torsinal strength than Haxagon socket screws.


SP Hight Adjustment Plate

Because all frames are not created equal, and paint thickness may vary, the dimension of the headtube may be different from frame to frame. In order to keep the smallest possible gap between the top of the head tube and the headset cap, which guarantees the best headset sealing possible, we designed the SP Height Adjustment Plate. By adding or removing SP plates during headset cap assembly, you can adjust the gap’s height. Each WOOdman SP headset comes with three aluminum spacers.



Position Specific Bearings

For extreme use or light weight - the loads a headset has to cope with remain the same.In our Position Specific design we increase the number of balls in the bottom bearing to nearly 100% more than the competition. This, along with our full-grease spec, nearly doubles the lifespan of the lower bearing.



SGC Fork Crown Race

One of the key features of the SPG series is the SGC fork crown race- it can be assembled or removed without any tools.

Our patent SGC crown race allows it to be installed on the fork crown without tools, while the reinforced steel ring prevents deformation during the process. We also added a seal to ensure the least amount of maintenance possible.


Customer Reviews

Be the first to write a review
The cookie settings on this website are set to 'allow all cookies' to give you the very best experience. Please click Accept Cookies to continue to use the site.
WOOdman Axis Cannondale SI 50.8 Headset
You have successfully subscribed!
This email has been registered
Recently Viewed