K2 Bike
5500C, 4500C,
3000, 2000
Animal, Beast
Rear
5000, 4000
1000
Animal DH
4
up to 140
400
200
550
130-170
500
250
600
160-200
550
300
650
190-230
600
350
700
over 230
650
400
750
Spring Type
NB175 -x-x
NB2-x-x
NB175-x-x or NB2-x-x
Spring rate has an effect on damping. The higher the spring rate, the more damping will be required to control the motion of the shock. This is
why lighter riders feel their shocks may be overdamped while heavier riders may not perceive enough damping. See the notes on
Rebound
Damping and Compression Damping
below for a further explanation.
Changing Coil Springs
CAUTION: Girvin strongly recommends that your K2 Bike be disassembled and adjusted by your authorized
K2 Bike dealer. Your authorized K2 Bike dealer possesses the proper training and tools to service your bi-
cycle. Improperly assembled or adjusted bicycles can be extremely dangerous, and can result in failure during
use and severe injuries. These instructions are provided for owners having sufficient knowledge and the
proper tools to do the job.
You may need to change the coil springs on your K2 Bike in order to tune your suspension properly. We suggest this
be done by your local K2 Bike dealer or other qualified technician, but if you would like to change the springs on your
own, follow these instructions:
1.
Remove the rear wheel from the bike.
2.
Remove the upper shock bolt where the shock attaches to the frame and also the lower one or two bolts holding
the shock or shock strut to the swingarm.
3.
Loosenpreload collar from the spring by turning both preload adjuster collar and spring simultaneously and re-
move preload collar completely or loosen preload collar enough to remove lower spring clip.
4.
Remove spring and replace with desired spring. Make sure that the spring is the correct length for the shock. Make
sure to preload the spring with at least 1-2mm of preload.
5.
Reinstall the shock on the frame and torque all shock mount bolts to 150 in-lbs.
Once you have selected the correct spring for you, you will need to set up your suspension with the proper amount of
suspension sag
.
Suspen-
sion sag is the amount a shock compresses under the weight of the rider.
All suspension systems should exhibit some amount of suspension
sag. Girvin bikes and forks should all be set up properly with a certain amount of sag.
The optimum sag amount for all of our rear and front
suspension systems is 20% of the total shock shaft stroke, or 20% of the total wheel travel.
For example:
Our Cross-Link forks have a total shock shaft travel of 52mm which yields a total wheel travel of 76mm. To calculate
the
optimum sag
for this fork, multiply 52mm by .2. The answer gives you a suggested sag , which for the Cross-
Link is 10mm at the shock, or 15mm at the wheel. We suggest that you measure the amount of sag at the shock
instead of the wheel.
See the next section on Preload to adjust the amount of sag
. The suggested suspension sag amounts for our bikes and forks are as follows:
Frame (Rear shock) / Fork (Front shock)
Total Wheel Travel
Sag at Shock
Carbon Frame (5500C, 4500C)
100mm
8mm
2-Tube frame (5000, 4000)
100mm
8mm
Extreme Frame (Animal, Beast)
125mm
8mm
World Cup Frame (3000, 2000, 1000)
90mm
10mm
Downhill Frame (Animal DH)
150mm
10mm
Cross- Link (All models)
76mm
10mm
Chubby
100mm
20mm
Chubby LT
125mm
25mm
Rear Shock Removal
Shock Spring Removal
12
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