56 FEBRUARY 2020 scca.com
Making fundamental changes to a successful program would be foolish,
so to that end, the 2020 Tire Rack ProSolo
National Series will retain much of its
familiarity with years past. Similar to what
ProSolo competitors have experienced
over the last few years, the coming season
will see mostly evolutionary changes to
the rules, although there will be one very
notable change in event format. You see,
with event site limitations looming, the series
is going to witness a bit of a revolutionary
format at a handful of events in the
12-event, regular-season series, with many
ProSolos moving to a single course format.
Single course ProSolos were held a
few years back, and lessons from that are
being rolled into a new PS1 rule set, with
the goal of better maintaining the ProSolo
experience at sites that can’t support a
traditional mirrored course setup due to size
or shape limitations. This year’s schedule
includes trips to Bristol, which is large
enough for dual courses, but limitations
due to shape and light poles argue that
a great single course could be preferable
to a compromised traditional setup.
Grissom, meanwhile, is simply too narrow,
and surface deterioration at FedEx Field
has restricted it to single course events.
The viability of a ProSolo at GrandSport
Speedway in Hitchcock, Texas, in May was
up in the air at the time of this article, but
the idea of a PS1 event on a road course
certainly seems viable for the future.
The other ProSolo rules changes have
to do with classes. As has always been
the promise, a class can graduate out of
the Indexed world. Entry levels in G Street
last year were high enough to accomplish
that. G Street will join AS, BS, CS, ES,
SSC, STR, STX, and STS as standalone
classes. Frequent bumping in 2019 and
no obvious reason to expect a change in
2020 has relegated SS, HS, SSR, STU, and
L4 to various combined Indexed classes.
After many years of struggling with trying
to balance classes with a mix of two-wheel-
drive and all-wheel-drive vehicles, the latter
are numerous enough to earn their own
Indexed class. While that may not necessarily
cause all-wheel-drive competitors to dance
in the streets, most of their two-wheel-drive
competitors will consider this to be good news.
As always, Indexed classes are formed with
considerations starting with tire choice, size,
power, and weight, with a hope of reasonably
consistent turnouts throughout the country.
That said, there is no perfect answer, but this
should be a step toward a better answer.
The Indexed classes will
include the following:
• L1: all vehicles from Street Prepared, Street
Modified, Prepared, and Modified categories.
In other words, anything on race tires
• L2: all Street category vehicles
(not including SSR)
• L3: all Street Touring and SSC vehicles
• R1: all Modified category
vehicles, including KM
• R2: all Prepared category vehicles
• CAM: all CAM category vehicles
• S1: two-wheel-drive vehicles from SSM,
SM, SMF, BSP, CSP, DSP, and FSP
• S2: two-wheel-drive vehicles from
SSP, ASP, SSR, and ESP
• S3: two-wheel-drive vehicles
from SS, STU, and FS
• S4: all-wheel-drive vehicles from SSM,
SM, ASP, ESP, SS, STU, STH, BS, and DS
• S5: two-wheel-drive vehicles
from DS, STH, and HS
• FJA, FJB: will continue as non-
Challenge eligible classes
As always, this column is far from official.
Please refer to the official SCCA ProSolo
Rulebook when it’s published on scca.com/
prosolo for the final rules and details.
The 2020 ProSolo season is shaping up to be, well,
a different shape | WORDS Paul Brown | IMAGES Perry Bennett
The ProSolo season should not see significant changes for
the majority of events (BELOW), but due to site restrictions,
a number of venues will utilize the new PS1 format (LEFT).
“Single course ProSolos were
held a few years back, and
lessons from that are being
rolled into a new PS1 rule set”