The hyper 7/8/8.5 have a 43/13 diff ratio. The one you linked which is from a Hyper ST has a 43/10 ring to pinion tooth count.
Castle Neu 1520 on 6S LiPo Powered Gmaxx (Nitro Killer)
Predator with OS .21TM
Supermaxx with Mach .26
Revo with OS .18TZ
Kyosho ST-RR Conversion
Ofna CR with Tekin ESC/Motor (2)