Amendment to tyre regulations
Official Statement from the FIM
The Grand Prix Commission, composed of Messrs. Carmelo Ezpeleta (Dorna, Chairman), Claude Danis (FIM), Hervé Poncharal (IRTA) and Takanao Tsubouchi (MSMA), in the presence of Mr Paul Butler (Secretary of the meeting), in a meeting held on September 23 at the circuit of Twin Ring Motegi, unanimously decided to introduce the following amendments to the Road Racing World Championship Grand Prix Regulations – application as from 1st January 2007.
2.9. Tyre restrictions for MotoGP
2.9.1 Wet tyres are not subject to supply restriction.
A wet tyre is defined as a tyre which has a land to sea ratio of at least 20% overall, and a minimum ratio of 7% in each third of the section profile.
The tyre may be moulded or hand cut, but each groove must have a minimum depth of three millimetres over 90% of its length.
Any tyre with a land to sea ratio of less than 20% will be deemed a slick tyre. In case of dispute the decision of the Technical Director will be final.
2.9.2 Prior to the start of the season (defined as the day before the start of the first
IRTA MotoGP test of the current year), each team must register the brand of
tyre it will be using with the Grand Prix Technical Director.
Should a team choose to change its designated brand of tyre during the season it must inform the Technical Director in writing prior to the start of scrutineering at the event where the change will take place.
2.9.3 Teams that are supplied by a tyre manufacturer that has achieved at least two
MotoGP race wins in dry conditions since the first race of the 2005 season
will be restricted in the quantity of slick tyres that each of the teams riders
may use at a single event as follows:
During all practice sessions, warm up and the race a maximum of 31 slick
tyres, specifically - Front tyres: 14
Rear tyres: 17
When a tyre manufacturer, not subject to the limitation at the beginning of
the season, achieves two MotoGP wins in dry conditions during the current
season, it will become subject to the restrictions at the third event
after the one where the second win was achieved.
2.9.4 Between 12.00 hrs. and 17.00 hrs. on the day prior to the start of official
practice, the Technical Director will mark the tyres available to each entered
2.9.5 Each motorcycle entering the track fitted with slick or hand cut tyres (as
defined in Art. 2.9.1) must first have its tyres checked for compliance.
2.9.6 In the case of an interrupted race, a rider must use tyres from his allocation
of marked tyres for the restarted race.
2.9.7 In the unlikely event of a tyre being accidentally damaged during the fitting
process it may be replaced with a tyre of the same specification with the
permission of the Technical Director. Such replacement tyres will be marked
and included in the allocation of the rider concerned.
2.9.8 Should an exceptional and unpredictable safety problem arise for a
manufacturer during an event, so as to prevent a team supplied with its tyres
from safely competing in the race, then that manufacturer must inform and
prove to the satisfaction of the Technical Director the severity of the
problem. The Technical Director may then ask the Race Direction to grant an
exemption. Such request must be made before 17.00 hrs. on the day of
The exemption if granted will apply as follows:
Each rider using tyres supplied by the manufacturer granted the exemption
will be supplied with three tyres of a new specification (front and/or rear
depending on the determination of the problem). Such replacement tyres will
be marked by the Technical Director, and only these tyres may be used in the
A new provisional starting grid will be published with all of the riders
supplied with the tyres of the manufacturer granted the exemption starting at
the rear of the grid in the order of their qualifying positions.