Tried a Stinger 6 in the back; didn't work. The rim was too wide for the P4's brake shoes. Sorry, don't know about the Stinger9. Call Hed?
I expect the front should be no problem as the brake is a standard caliper.
Front works, Rear NOT. Rim wide is to much for the P4 and early editions of S3. Same problems occur with some other wheels, take a look at the Cervelo website > P4