HEADSET
Headset Inspection:
The headset is responsible for locking the fork into the
frame. Every month the headset bearing adjustment should
be tested. This is done by standing astride the frame top
tube with both feet on the ground and fi rmly applying the
front brake and rocking the bicycle back and forward. If the
headset is loose, it needs to be tightened to avoid potential
damage to both the bicycle and the rider. However, do not
over-tighten. If the fork tends to stick or bind at any point
when rotated slowly sideways, the bearings are too tight.
‘Ahead Set’ Type Assemblies
When assembling a new bike with this type of fi tting, the
dust cap covering the Allen head bolt needs to be removed
and the bolt holding the top plug undone. Remove the
cardboard cover. Slip the handlebar stem over the exposed
fork steerer and replace the top plug. The handlebars and
the forks need to be facing the front. Using the Allen head
centre bolt, secure the steering assembly until there is no
freeplay. Take care not to over tighten. Tighten up the bind-
er bolts which clamp the handlebar stem to the fork steerer.
Ensure the handlebar stem cannot turn in the steerer tube.
To adjust the headset after the bicycle is assembled:
• Loosen the stem binder bolts.
• Use the Allen bolt to re-adjust the compression mecha-
nism.
• Re-fasten the stem binder bolt fi rmly.
Unlike standard headsets, the 'Ahead Set' has an unthread-
ed, full-thickness bicycle fork steering tube. Adjustments
are made using an Allen headed compression bolt, and
then are fastened by clamping the handlebar stem directly
onto the fork steerer.
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If the gears are not shifting smoothly, the cable tension
needs to be increased by turning the derailleur barrel ad-
justor r the shifter barrel adjustor counterclockwise. If the
gears over-shift into the next highest gear, the cable tension
needs to be decreased by turning one or both of the bar-
rel adjustors clockwise. If these adjustments do not provide
enough of the needed change, you may adjust the cable
tension by loosening the Smm adjustor at the bottom of
the Shimano Sora derailleur. Move the cable in or out and
tighten the screw again.
Lubricate your chain on a regular basis.
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