Pirelli's Paul Hembery says they are changing tyres to benefit the majority of teams

Pirelli's Paul Hembery has told Sky Sports News that it was their decision to modify tyres for the Canadian Grand Prix in the interests of the majority of teams.

Pirelli hope the fact the new tyre will have a construction similar to last year's means that teams are better able to react to the change. The 2012 tyre had stiffer sidewalls, which caused its shape to change slightly less under aerodynamic loads than its successor. "We're going to give teams a lot more data tomorrow," Hembery said. "We're finalising the precise specification. Really, it's a little bit of a mix of what we've been using this season and some of the structural stuff we had last season - which will help minimise the impact for the teams. "As you can imagine, there's a lot of work to be done on aerodynamics and tyres can impact on that - the way they deform - so teams will be keen to have that data asap so they can all start working towards Canada. He added: "From an aero point of view, that can have an impact. That's why we'd like to give them something that they've used a little bit in the past - so they've already got some data. "It's also probably as well the way the compounds will work with the car: they'll be less aggressive from some points of view which will slightly modify the strategy of how they use the tyres during the race."