Hi Klaus, the Sirac is designed for light Enduros and the @ should be to heavy. Look, that the weight specification of the Sirac is high enough, the RD03 for example needs 69. The Sirac is a good tyre, I am satisfied on my DR 650 RSE, but for the @ you better should select Metzeler Enduro 4 or the new Bridgestone. regards, Axel