That's a great question! Basically Yes. The new binding system is compatible hity just about everything in the crampon line dating back 4-5 years. Petzl published a PDF of the compatibility that covers virtually everything: www.petzl.com/sfc/servlet.shepherd/version/download/068Tx000001jUUSIA2
Will the new front section, toe bails and heel lever be backwards compatible with the last generation heel pieces and toe pieces?
That's a great question! Basically Yes. The new binding system is compatible hity just about everything in the crampon line dating back 4-5 years. Petzl published a PDF of the compatibility that covers virtually everything: www.petzl.com/sfc/servlet.shepherd/version/download/068Tx000001jUUSIA2