Inboard camber-link positions F/R
Outboard camber-link positions F/R
Upper shock positions F/R
Lower shock positions F/R
Ackerman settings (inboard/outboard)
Gigantic 16mm shocks
The RR’s huge16mm shocks are the
largest among truggies. The bouncers
now feature 6-hole pistons to allow all
that extra oil to pass through the alu-
minum shock bodies. The plastic bush-
ings and O-rings are still at the bottom of
the shock body, but now those parts are
larger to accommodate the larger shock
body and 4mm shock shafts.
The STR-R’s new shocks improve bump
handling and provide greater control in
rough track conditions.
The 16mm shock design is the same as
the 12.5mm shocks found on the original ST-R, but the bigger shocks provide
better bump handling and are more
One of the
RR and the
is the new,
longer chassis. The extra
look at the
and the rear
wheelbase by The extra-long chassis features
more than fine machine work and tubular
25mm. The rod braces that permit torsional
extra length flex for maximum traction.
has been added to truck’s rear to keep weight
centered, reducing rear weight transfer for better
steering characteristics and a more balanced feel.
All of the team drivers preferred the prototype
chassis with the engine forward because it produced more steering and was faster in the corners, so Kyosho chose it for the production ST-RR.
lighter, the RR’s
gears are made
Beefier (yet lighter) drivetr ain
Truggy racing is aggressive, and to go fast you
must hammer on the throttle. Kyosho
decided to beef up the suspect drivetrain
of the original ST-R by including chromoly
ring and pinion gears with the RR. Chromoly
(chromium-molybdenum steel) is known for having high
tensile strength and an excellent weight- to-strength ratio,
and that’s why it’s used for Kyosho’s latest gears. The RR’s
new universal driveshafts are designed to shave weight and
are made of chromoly steel like the ring and pinion gears, which
Kyosho claims are their toughest yet. For instant stopping power,
Kyosho includes their machined rotors and semi-metallic brake
pads. The thick pads wear extremely well and should easily last a full
season or two. Kyosho’s standard 3-shoe blue-anodized aluminum
clutch is paired with 1.1 springs for snappy acceleration. The clutch
engages a hardened 13-tooth clutch bell that is paired with a lightened
50-tooth spur gear.
It’s all in the details
Some of the ST-RR’s improvements are obvious such
as the larger shocks, but some of the changes aren’t
as easy to spot. Wide-offset 9mm wheel hubs
increase the front and rear track of the STR-R by
18mm and improves stability and bump handling.
Kyosho sells optional wheel hubs if you want to
change the width, but it’s pretty dialed with the 9mm
hubs. An “HG” air filter looks fairly standard, but the filter is made with high-density foam that breathes well while keeping
dirt and dust out of the engine. The HG filter was first introduced in the
777 WC buggy released last year.
hexes are now standard on the ST-RR.
Wheelnuts with nylon
rings do a better job
of securing the wheel.