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This is the assessment from Alastair McQueen, Lotus Senior Test Driver - this is also in the archives.
ELISE TYRE ASSESSMENT
Three different tyre specifications were assessed fitted to a standard Elise S1.
The control tyre was the Original Equipment Pirelli.
Pirelli P-Zero.
OE specification. Front 185 55 15 Rear 225 45 16
Yokohama Advan Neova LTS
Front 195 50 15 Rear 225 45 16
Bridgestone SO2
Front 195 50 15 Rear 225 45 16
All tyre pressures set at – Front 1.6bar, Rear 1.9bar
Dry Assessment
These assessments were carried out on the Hethel Test Track and public roads in cool, dry conditions.
Steering
Bridgestone.
Slightly low steering effort on-centre but with highest overall effort. Response characteristics on and off-centre similar to Pirelli.
Steering kickback similar to Pirelli. Score
7.5
Yokohama.
Similar to B/S with slightly low on-centre effort but higher self-aligning torque.
Overall lowest steering efforts, slightly elastic feel with lowest kickback.
Score 8
Pirelli Score 7.5
Handling
Bridgestone
Understeer and lift-off oversteer similar to Pirelli. Tracking and dedication are slightly worse than Pirelli, car feeling nervous on
bumpy surfaces and single wheel inputs.
Score 7
Yokohama
Slight yaw, but overall better balanced than B/S and Pirelli. Very good tracking stability and dedication. Score 8
Pirelli Score 7.5
Ride
Bridgestone
Poor secondary ride, especially from rear, duddery and unmatched to chassis damping. Score 7
Yokohama
Good rolling comfort, secondary ride and impact absorption, better than Pirelli. Score 8
Pirelli Score 7.5
Grip
Bridgestone
Overall slightly higher dry grip than Pirelli, but with slightly less progressive limit characteristics. Score 7.5
Yokohama
Highest overall dry grip with good progression at limit. Grip retained for longer at extreme slip angles. Score 8
Pirelli Score 7.5
Noise
Bridgestone Score 7
Yokohama Score 7.5
Pirelli Score 7
Dry Summary
Overall the Yokohama tyre showed characteristics which enhanced the performance of the Elise, particularly in ride, tracking
stability and grip. The Bridgestone tyre
characteristics were similar to the OE Pirelli but slightly worse in ride, tracking stability and limit grip performance.
Wet assessment
These assessments were carried out on the Hethel Test Track and public roads in wet conditions.
Yokohama.
Road. Overall similar results to those achieved in dry conditions.
Track. Wet grip significantly higher than OE Pirelli, with handling bias slightly towards understeer. The tyre gives good grip to
extreme slip angles as was shown in the
previous dry assessment, and also has good resistance to aquaplaning. Good yaw stability throughout corner.
Wet Grip Score 7.5, Handling 7
Bridgestone.
Road. Similar results to those achieved in dry conditions although it was felt that dedication and tracking stability was slightly
improved, with good resistance to
aquaplaning.
Track. Overall wet grip similar to Yokohama, but with slightly less understeer. Lift-off oversteer progressive and predictable with
grip maintained to extreme slip angles.
Wet Grip Score 7.5, Handling 7
Pirelli.
Wet Grip Score 6.5, Handling 6
Wet Summary
The Yokohama tyre offers good wet weather performance, with well balanced and predictable handling. The slight bias towards
understeer offers the driver a clear and safe
warning that the tyres limit is being approached.
The Bridgestone tyre offers similar wet weather performance to the Yokohama.
Overall Summary
Both the Bridgestone and Yokohama tyres are suitable alternatives to the OE Pirelli tyres used on the standard Elise. The
Bridgestone tyre offers significant gains in wet
weather over the Pirelli, but only modest improvements in dry grip at the expense of slightly worse handling and ride qualities. The
Yokohama tyre offers similar
improvements in the wet to the Bridgestone, but with better dry characteristics in all respects
Das Adler Formel 1 Fabrikat ist leider nicht dabei.