Following rider feedback from last year's Catalunya MotoGP, Bridgestone will supply rear tyre compounds that are one step softer for this weekend's 2011 event.
"We listened to rider calls from last year's race here that the extra hard rear was not necessary from the point of view of grip and consistency," explained Bridgestone's Hirohide Hamashima.
"We carefully analysed last year's race data and tyre choices and as a result we have chosen rear options one step softer this year.”
Those options will be the (asymmetric) medium and hard compounds.
Meanwhile, scattered showers are forecast throughout this weekend and, for the first time this season, Bridgestone has selected its hard compound wets tyres.
This year's Catalan round is taking place one month earlier than the 2010 round.