Pirelli has finally admitted defeat in its attempts to change to Kevlar-belted rear tyres from the British GP, due to ongoing opposition from some teams.
The intention was to use the switch to last year’s construction in an attempt to address the delamination issue, but instead Pirelli has changed its production process – in other words the method of bonding.
The revised tyres were tested on Friday in Canada, although wet conditions for much of the day limited mileage.
They were also tested by Mercedes at its infamous Barcelona session, although Pirelli says that 2013 race compounds were not used on that occasion.
Pirelli had been suggesting that its planned change would go ahead, but it was always relying on full support from the teams, as outlined here in previous stories.
A Pirelli statement said: “The tyre construction will remain unchanged, contrary to Pirelli’s initial plans. This decision is due to the fact that the new tyres, which were brought to the Friday free practice sessions in Canada, could not be tested sufficiently due to rain – and that the teams failed to agree unanimously about introducing the changes. Instead a change in the tyre production process should now ensure that the delamination issue has been addressed.”
Meanwhile tyre choices for upcoming races are hard/medium for Silverstone, medium/soft for Nurburgring, and hard/medium for Hungary.