Specifications

• A vehicle handling course may be set up in order to verify the following when
the vehicle is in motion: driver skills, turning radius and steering precision. In
particular, Inspectors will verify that steering is precise, with no excessive
play.
Article 57: Wheels
• The rims must be between 13 to 17 inches in diameter.
• The wheels located inside the vehicle body must be made inaccessible to
the Driver by a bulkhead. Any handling or manipulation of the wheels is
forbidden from the moment the vehicle arrives at the starting line until it
crosses the finish line.
Article 58: Tyres
All tyre types are allowed as long as they are fitted on the type and size of rims
recommended by their manufacturers. The tyre / rim assembly must have a
minimum width of 80mm, measured from sidewall to sidewall. The width is
measured with the tyre fitted on its rim at its rated pressure.
Caution: the manufacturer’s size indications should not be taken as
measure, as the width of the rim directly impacts the width of the
rim/tyre assembly.
Article 59: Lighting
The vehicle must have a functional external lighting system, including:
• Two front headlights
• Two front turn indicators
• Two rear turn indicators
• Two red brake lights in the rear
• Two red rear lights (may be combined with the brake lights)
• The centre of each headlight unit must be located at an equal distance and
at least 30cm from the longitudinal axis of the vehicle.
• The mandatory red indicator light for the self starter operation must be
separate from any of the above (Article 78)
Article 60: Horn
Each vehicle must be equipped with the authorised horn that can be purchased
from the Organisers.
Article 61: Driver Position
For safety reasons, the head-first driving position is prohibited.
Article 62: Braking
• The vehicle must be equipped with a four-disc hydraulic brake system, with
a brake pedal, which has a minimum surface area of 25cm
2
.
• The brakes must operate independently on the front and rear axles or in an
X pattern (i.e. right front wheel with left rear wheel, and left front wheel with
right rear wheel).
• A single master cylinder may be used, provided that it has a dual circuit (two
pistons and dual tank).
• The effectiveness of the braking system will be tested during vehicle
inspection for both Drivers. The vehicle must remain immobile when it is
placed on a 20 percent incline with the main brake in place. Moreover, a
dynamic inspection may be performed on the vehicle-handling course.
• Race Inspectors may check the brakes again just prior to the start.
Shell Eco-marathon ® Official Rules 2011 – Chapter 1
20