Illustration of where dimensions are measured
from
Dimension
limit
Guide
lead
NOTE
Guide lead is the horizontal distance from the centre of the rear axle to the
centre of the guide pivot
a
max
Overall
length
b
max
Overall width (see v)
c
max.
Front
tyre diameter
d
min.
Front
tyre width
e
min.
Rear
tyre diameter
NOTE
Minimum tyre diameters apply at the start of each race
f
min.
Tyre
width
g
max
Ground
Clearance
h
min
Height
at rear measured from the bottom of the chassis using a
recessed tech block.
i
max.
Guide
blade length
j
max
Height
of lower edge of rear bodywork
1/24 Classes are measured from the bottom of the chassis using a
recessed tech block.
1/32 Classes are measured from the track surface (This will change
after the 2009 1/32 Nationals)
o
oo
max
Length
from rear over which maximum body height applies
NOTE The roof may exceed this height. BSCRA
may permit specific saloon bodies to exceed the rear body height limit.
p
min
Height
from the bottom of the chassis to the top of the vertical part of the molded
front wheel arch. This is measured with a recessed tech block.
NOTE
Applies to 1/24 saloon only. Cars must meet either q or r, they don't need
to meet both
q
min
Height
from the bottom of the chassis to
the center of the bonnet over the front wheel center line. This is
measured with a recessed tech block.
NOTE
Applies to 1/24 saloon only. Cars must meet either q or r, they don't need
to meet both
r
min
NOTES
i)
The tables at the start of each section of the car
standards show what limit apply to each class. These diagrams are intended
to clarify the rules written in the car standards, the car standards take precedence.
ii)
Dimensions k, l, m and n are used in the body approval process - competitors and
scrutineers need not measure these dimensions.
