One of the most popular tuning features in our Revved lineup is the reach-adjustable GeoAdjust Headset. With the GeoAdjust Headset you can quickly and easily adjust the reach and wheelbase of your frame by 10 mm. This allows you to dial in your frame’s fit based on your unique dimensions, as well optimizing the handling for your local terrain. For example, riders may use the shorter setting for the average trail ride, while using the long setting when heading to the bike park.

Just like any normal headset, the GeoAdjust Headset consists of upper and lower cups. While the upper cup is used across the entire line, there are two lower cup options for the GeoAdjust Headset: a 0 mm cup, and a taller 15 mm cup.

The 0 mm cup is designed to work best with 29” forks and the 15 mm cup with 27.5” forks. Feel free to use either cup to fine tune your stack height, head tube angle, and bottom bracket height. The possibilities for bike nerdery are next-level. This is why both cups are available when you purchase your Seatstay Tuning Kits, as well as individually in our online store.

If you’re comfortable swapping out the stem or bars on your bike, you have the skills necessary to adjust your GeoAdjust Headset. A slip fit with an o-ring holds the cups in place even if you remove your fork, and an angular contact design ensures that there won’t be any wobbling or knocking under loads. And when it comes time to replacing bearings, those drop right into the cups, so it’s easy to service down the road.

GeoAdjust Headset Tuning tips:

  • GeoAdjust in the Short position: more upright fit on the bike, quicker turn-in when initiating corners.
  • GeoAdjust in the Long position: more stretched out fit on the bike, increased stability at high speeds. It’s like hitting the turbo button!
  • The Smash, Gnarvana, and Trail Pistol (29” bikes) lower cup:
    • 0 mm cup - default
    • 15 mm cup - raises the BB height slightly for better pedaling clearance, slackens the head tube angle around .5 degrees. Recommended for ledgy desert riding.
  • Megatrail and Shred Dogg (27.5” bikes) lower cup:
    • 15 mm cup - default
    • 0 mm cup - lowers the BB for stable cornering, steepens the head tube angle around .5 degrees. Recommended for slalom racing and flow trail fun.
GeoAdjust Parts Layout

GeoAdjust Headset small parts order

Below is the order of parts for installing your headset from the top cap to the fork crown.

  1. Top Cap and preload bolt Steerer spacer - 3 mm minimum recommended above the stem
  2. Stem
  3. Steerer spacers
  4. Dust-cap
  5. Split race
  6. Upper bearing
  7. Upper headset cup
  8. Head tube / frame
  9. Lower headset cup
  10. Lower bearing Crown race
  11. Fork crown
GeoAdjust Headset in Short position

How to change the headset orientation?

When installing and removing the cups, be mindful of the o-rings. The o-rings need to stay in the grooves cut into each headset cup and can be ripped if the cups are torqued down with the ring outside of its groove.

To flip your headset around, we recommend the following process:

  1. Loosen the stem bolts
  2. Loosen the top cap
  3. Slide the top cap to the top of the steerer
  4. Tighten the lower stem bolt finger tight against the steerer
  5. Lift the head tube to drop the lower headset and bearings
  6. Flip the lower headset, reinstall by hand
  7. Settle the lower bearing in the cup and lower head tube onto bearing
  8. Pop the upper cup out by hand and flip it around
  9. Settle the upper bearing into its seat
  10. Slide the split race into the bearing
  11. Push the dust cap down to the split race
  12. Loosen the stem bolt and slide the stem back down
  13. Reinstall 3 mm spacer above stem
  14. Reinstall top cap and preload bolt
  15. Torque to 5 - 7 Nm

Typically you wouldn’t torque a headset, so tighten it down to the point where you feel the bearings begin to bind and back off a little bit. This will ensure that the GeoAdjust cups are tightened into place.

If you see yourself wanting to play around with the headset positioning frequently, you can leave 10-15 mm of spacers above the stem so that you never have to completely drop the fork to move the cups around.

Your frame and headset will come greased from the factory if you order a complete bike. If you are assembling your frame yourself grease the following contact points:

  • GeoAdjust cups in the frame
  • Bearings in the GeoAdjust cups