Does Fox or Push Ind. sell an RP23 (7.0" x 1.6") for a 07 FSR XC? I am thinking about purchasing a 07 FSR XC rim but would like to replace the OEM X-Fusion RLA with a Fox PR3. The 06 FSR XC bikes came with (6.5 x 1.5") rear shocks, which are readily available from Fox. Why did Specialized change the shock size and corresponding frame geometry for 2007?