Surer believes that a change would be good for Vettel.
Formula One silly season continues to get interesting with the the top teams and drivers plan their strategy for the 2014 season.
Marc Surer, a prominent German-speaking commentator, said alternate marques like Michelin and Bridgestone could enter F1 "at short notice" to replace a departing Pirelli "if they wanted to".
Marc Surer joins other commentator's voicing their opinions on Sebastian Vettel's future.
The triple world champion's reputation has come crashing down
No change in rules made closer competition, but Red Bull is slow compared to their rivals