Manitou SPV Suspension Technology and Set-up Tips
In 2003, Giant featured Manitou’s SPV (Stable Platform Valve)
rear shocks on its DH, AC and VT bikes. These were so well received by
the market that we now feature SPV technology in front forks on DH, AC,
VT, NRS and XtC bikes.
Benefits of Manitou Swinger SPV Air and Coil Shocks:
The Manitou Swinger rear shock was designed to improve the bike's pedaling
and handling efficiency without sacrificing the plush, bump-absorbing
ride. This is a result of SPV’s unique stabilizing valve system,
which controls how sensitive the shock is to low resonance input (such
as pedaling). This sensitivity is externally adjustable as well. The
Swinger shock lets you set the compression damping characteristics and
position sensitivity with a simple shock pump. Pump in more pressure
and you have a firmer pedaling platform. Decrease the pressure and the
bike has a suppler ride (the pressure range is between 75 and 150 PSI
in the shock’s “piggyback” reservoir).
Improved pedaling efficiency isn’t the only advantage of SPV
technology. SPV is also position sensitive, which means that compression
damping is firmer at full compression than at the initial compression
of the shock, allowing for a plush ride with no bottoming.
Another adjustment feature located on the reservoir of coil shocks
or top-cap of forks, allows riders to fine-tune the shock’s progressivity.
With a 16mm socket wrench or the SPV 16mm Volume Tuning Socket (available
after market from Answer Manitou), you simply turn in the adjustment
nut to make the shock more progressive at the end of it’s stroke,
or turn it out to make the finish more linear. This feature helps control
bottoming of the shock, allowing a much wider range of rider styles and
weights to benefit from each suspension system.
Setting up the Manitou Swinger SPV Air and Coil Shocks:
Step 1: (AC and VT only): Choose how much travel you
want by positioning the rocker arm anchor bolt in either the fore (VT
5.75 inches, AC 5.3 inches) or aft (VT 5 inches, AC 6.3 inches ) setting.
Step 2: Set the SPV pressure for your body weight
by pumping 50-75 percent of your body weight into the SPV valve. This
is the red valve on 3 way shocks, or the black valve in the middle of
the red 16mm adjustment nut on the remote reservoir of 4/6 way shocks
and on the top cap of front forks. The pressure should be within a range
of 50-175 psi on the pump’s gauge. The higher the pressure, the
firmer the pedaling platform will be.
Step 3: (6 or 4-way coil rear shocks and front forks
only): Adjust the SPV’s position-sensitive air volume setting by
using a 16mm socket wrench or Manitou’s SPV Volume Tuning Socket.
The least amount of resistance is achieved by turning the dial counterclockwise
to the fully open position. To increase the shock’s compression
damping and to make the shock more resistant to bottoming out, turn the
SPV Volume Dial clockwise. The more sag you run (or the heavier you are),
the more clockwise turns you make on the SPV Volume Dial (six turns total).
Step 4: Set up shock/fork’s sag (on air shocks
pump air into the black valve; on coil shocks wind preload on to the
coil spring*). This is the amount that the shock/fork
compresses when the rider is sitting motionless on the bike. This will
vary depending upon the type of bike, the rider style, terrain etc. Typically
this will vary between 10-20% of available travel for XtC and NRS forks
and between 25-35% of available travel for VT, AC and DH bikes.
* If more than 8mm of preload on the coil spring is
required, contact Answer Manitou for a different spring.