Overdrive 2 Headset Instruction; Composite Front Fork - Giant Propel series Owner's Manual

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OVERDRIVE 2 HEADSET INSTRUCTION

The Propel and Envie series bikes feature OverDrive 2 to offer unprecedented steering perfor-
mance with no additional weight. The OverDrive 2 headset features massive 1 1/4-inch top and 1
1/2-inch bottom bearings and provides up to 30 percent more torsional steering stiffness.
Once the headset assembled, make sure that some play exists between:
‡ the fork crown and the bottom of the headtube
‡ the top of the headtube and the conical spacer
So the steerer rotates freely and easily without resistance.
There is no minimum clearance value but only a recommended value:
‡ lower clearance : 1.0mm
‡ upper clearance : 0.5mm
CONICAL SPACER
WITH SEAL
COMPRESSION RING
GREASE inside and outside
TOP BEARING(1''1/4)
GREASE inside and outside
OVERDRIVE HEAD TUBE
GREASE bearing race
TOP BEARING(1''1/2)
GREASE inside and outside
TOP BEARING(1''1/2)
GREASE bearing race
To learn more about OverDrive 2 technology introduction, please visit the Giant website at giant-
bicycles.com.
0.5
1.0
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COMPOSITE FRONT FORK

Steerer tube
The steerer tube of the Propel and Envie forks are constructed with carbon fiber material for light
weight and optimized stiffness.
Please contact your authorized Giant dealer to modify the steerer length to your preference. If you
are a qualified professional mechanic, please follow these instructions:
CAUTION:
1. Always use a quality hacksaw with a fine-tooth
blade when cutting the steerer tube. A poor
quality blade could damage the steerer material.
2. Lay the fork on a flat, stable surface. Use a pro-
fessional saw guide to help you cut. Measure
twice, cut once!
3. Do not clamp the composite steerer with more
than 8Nm of torque. Over-clamping force could
damage the steerer tube.
4. A professional saw guide for steerer cutting is
must to be used. For example: PARK TOOL
Oversized Adjustable Saw Guide.
Fork structure
Do not file the fork safety tabs or drill any holes in the fork structure.
WARNING: The fork has been designed to optimize performance. Do not modify the fork
by drilling or filing. Any modification will affect the fork structure and damage it. This may
result in serious personal injury or death.
Front reflector
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