dallara F305 - Tire Information; Suggested Setup

5 TIRE INFORMATION
Tire dimensions depend on inflating pressure, rim width and camber angle.
These stiffness values are based on the recommended inflating pressure (hot tyres).
FRONT TIRE Avon Bridgestone Kumho Hankook Yokohama
Specification 180/55-13 180/55-13 180/55-13 180/550-13 190/50-13
Free radius (mm) 277.5 277.2 275.0 275.5 278.0
Vertical stiffness (Kg/mm) 17.0 14.4 18.3 (1.2bar) 17.5 17.0
Hot tire pressure (bar) 1.50 1.50 1.50 1.60 1.60
REAR TIRE
Specification 250/57-13 240/57-13 240/57-13 240/570-13 240/45-13
Free radius (mm) 287.0 286.5 288.0 286.0 288.0
Vertical stiffness (Kg/mm) 17.5 16.7 19.6 (1.2bar) 19.0 17.8
Hot tire pressure (bar) 1.65 1.50 1.45 1.60 1.60
SUGGESTED SETUP (shown set-ups for mono, when using twin we suggest to
increase front spring with 100lb/in and use 30x5 T-bar with 170mm blade)
These set-ups consider the complete car with the driver seated in it, ready to race.
FRONT Avon Bridgestone Kumho Hankook
Ride hei
g
ht
(
mm
)
15 16 14 15
Camber
(
de
g)
2°45’ 3°30’ 3°45’ 3°30’
Toe
(
de
g)
(
total two wheels
)
20’ OUT 10’ OUT 20’ OUT 20’ OUT
S
p
rin
g
s
(
lb/in
)
800 700 700 800
Vertical Pre-load - - - -
Dam
p
er static len
g
th
(
mm
)
315 315 315 315
Solid s
p
acer
(
mm
)
6666
Push rod len
g
th
(
mm
)
use the
p
ushrod ad
j
usters to set the chosen ride hei
g
ht
Roll centre settin
g
STD LOWE
R
STD LOWE
R
Roll bar settin
g
<<<>>><<< <<>><<>> <<>><<>> <<>><<>><<
Roll
p
re-load
(
notches
)
none none none none
REAR
Ride hei
g
ht
(
mm
)
27 28 26 28
Camber
(
de
g)
1°45’ 2°30’ 3°00 3°15’
Toe
(
de
g)
(
total two wheels
)
10’ IN 20’ IN 20’ IN 20’IN
S
p
rin
g
s
(
lb/in
)
900 800 800 900
Pre-load
(
mm
)
----
Dam
p
er static len
g
th
(
mm
)
315 315 315 315
Push rod len
g
th
(
mm
)
use the
p
ushrod ad
j
usters to set the chosen ride hei
g
ht
Roll centre settin
g
STD STD STD STD
Roll ba
r
21 OD 30 OD 19 OD 30 OD
Differential settin
g
60/80#4 60/60#6 60/70#4 60/80#4
A well balanced car will make the driver come closer to the car’s limit.
• In fast corners aerodynamics (ride heights and wing settings) have more influence on the
balance than in slower corners.
• In mid-and slow speed corners the weight distribution and the differential settings are the
most important contributors to balance a car.
• Tune the dampers to the chosen springs, not the springs to the dampers.
• Always pay attention to reach the correct tyre temperatures. No car can reach its limit on too
cold tyres. No car can be reasonably balanced with a significant difference between front and
rear tyre temperatures.
• Run the car always as low as possible, although without going stiffer on springs for running
lower.