Schroth Racing All models - INSTALLATION CHECKLIST - Manual (Page 2)

The angle of the lap belt is between
60° (touring cars) and 80° (formula cars)
measured from the horizontal allowing
the lap belt to ride properly over the
pelvis. An angle less than 50° may allow
submarining and cause the lap belt to ride up
into the abdomen causing injury to the soft tissue region.
When wearing the lap belt - the webbing is not bunched or
folded around the seat opening. It must lay fl at. The adjusters
are not “caught” or positioned in the opening which may
cause accidential release or failure when loaded.
Check beneath the webbing path to ensure it is not rubbing
on any edges of bolts, seat brackets, or seat openings that
might cut or abraid the webbing.
The lap belt is positioned close to the seat at an angle
(as shown at right) not more then 25° to
30° off the seat.
The snap hooks are correctly
clipped to the eye bolts with the latch towards the bottom
and secured with wire or a cotter pin.
The snap-on bracket does not bind on the
eye bolt when pulled in the direction the
belt is worn. Adjust alignment of eye bolt
using additional wavy washers.
The wrap in end of a bolt-in or snap-on bracket has the 3-bar
adjuster as close to the bracket as possible and the fi nal loop
of the wrap is complete.
The bolt-in lap belt bracket pivots at the bolt al-
lowing the webbing to align with the fl ow of the
webbing across the lap with an even load
across the bracket. Use a pivot sleeve or
a lock nut and red locktite and back it off
just enough to pivot.
The webbing load of any bolt-in or snap-on bracket must be
in plane with the fl at side of the bracket. Pulling at a 90°
angle will reduce the maximum load of a bracket 60%!
SHOULDER BELTS ANTI-SUB STRAPS LAP BELTS
The sub-strap opening in the seat bot-
tom is positioned properly.
Sub-strap must not be routed around
the front of the seat.
A 5-point (single) sub-strap
is center mounted 10-20°
forward of the tangential
plane of the shoulder belts
thru the sub-strap hole.
A 6-point (dual) sub-strap
is mounted a minimum of
20° rearward from perpen-
dicular drawn to the fl oor through
sub-strap hole in the seat immediately in front
of the groin. Two points of attachment should be approx 4”
to 6” between (2” to 3” left and right of the centerline).
Note: FORMULA CARS where the driver is sitting on the sub-straps: Attach sub-
straps rearwards in approximately the same location as the lap belts. This
type of setup is typically used with a “Formula Style” or “Hybrid Style”
looped sub-strap.
Adjusters on the sub-straps are not positioned or caught in
the sub-strap opening in the seat.
Snap-on or bolt-in brackets are attached properly with
approved backing plates using the hardware provided
by the harnessbelt manufacturer.
NOTE: NEVER MIX HARDWARE FROM
DIFFERENT MANUFACTURERS!
If using Double Brackets for bolt-in sub
strap applications, wrap is as pictured
with 50mm of extra webbing.
The sub-strap webbing is pulling in
the proper plane on the hardware.
10-12”
4”-6”
Shoulder belts are correctly
wrapped to the harnessbar or cage.
Only one bar of the 3-bar
adjuster is showing and it is
adjacent to the harnessbar.
3-bar adjuster is wrapped and
positioned directly against the
harness bar/cage or mounting
hardware.
Shoulder belt 3-bar adjusters are not obstructing the belt
fl ow through the shoulder belt opening and are positioned
BEHIND the seat back - as close as possible to the bar.
The belt is not twisted or constricted through the shoulder
belt opening in the seat. Shoulder openings allow direct pas-
sage from the top of the HANS or shoulders - directly to the
attachment points.
Shoulder belts are securely fi xed in position so that they can
not slide horizontally on the harness bar or roll cage.
Shoulder belts run down from HANS
or shoulder to the harnessbar at an
angle from 0° to a max of -30°. In no
case should the shoulder belt run at
an upward angle from the shoulder
or HANS to the attachment points.
Note: In Approved seats, up to 45° angles are approved for use with Schroth
Rallye series belts (includes QuickFits).
Shoulder belts are secured with the proper spacing between
the anchor points and cross over each other as needed. (see
chart on last back page)
High-density Rollbar Padding Fastened with Zip-ties
Stress Direction
Stress Direction