Scorpion GM

These are the tyres, in hard and soft versions, for gravel rallies

Pirelli GM is a tyre for gravel roads, developed for historic rally cars. The tread pattern design has been optimized for the specific use in all dry, damp, wet or muddy conditions according to the chosen compound. The strength of Pirelli GM is its great versatility. It has a unique asymmetric tread able to work efficiently in both directional stability and pure traction, ensuring the best performance in every weather condition. The strength success of this tyre lies in its three distinct versions: GM4, GM6 and GM8. The first is the compound developed for dry surfaces, perfect for maintaining high and stable performance on hard abrasive grounds with high temperatures. The GM6 compound is specifically for wet surfaces and low temperatures, assuring traction and lateral grip. The GM8 performance levels are enhanced on mud with low temperatures.
Conditions
Size
Version
Ø mm D
Section Width mm C
Tread Width mm C
Rolling Circumference
Rim
Wet
Damp
Dry
165/80R13
GM6-GM8
600
170
135
1871
5.5
8
6
4
185/70-15
GM6-GM8
640
203
160
2015
6.5
8
8
6
185/70R13
M4-GM6-GM8
600
195
160
1875
6
8
6
4

Temperature

Compound
Surface
WORKING TEMPERATURE °C
SOFT/SANDY
PACKED
HARD/ROCKY
Super soft
K8
20°-60°
100
49
0
Soft
K6
50°-90°
0
100
0
Soft
KM6
20°-60°
100
0
0
Medium
K4
70°-130°
0
51
100

Pressure info

Compound
Condition
Air temperature (°C)
Pressure (Bar)
WET
DAMP
DRY
-5
0
5
10
15
20
25
30
30+
COLD PS START
HOT PS END
Super soft
100
100
49
100
100
100
100
0
0
0
0
0
1.8
2.2-2.4
Soft
0
51
100
0
0
0
100
100
100
100
0
0
1.8
2.2-2.4
Soft
100
100
49
0
100
100
100
100
100
0
0
0
2.0
2.2-2.4
Medium
0
0
100
0
0
0
0
0
100
100
100
100
1.6
2.2-2.4

Find a dealer

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Tyre identification

The markings that appear on the sidewall of the tyres indicate the basic size of the tyre and the rim diameter. Discover how to read a tyre.

Tread hand-cutting

Hand-cutting is useful for improving grip in certain intermediate situations, between dry and completely wet surfaces, or on mixed gravel/rock and sandy surfaces. Download PDF to discover more

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