Schumacher have released a complete gear diff for the Cat K1. The new diff provides lots of run time between maintenance rebuilds and with steel gears is super strong. Suitable for a wide range of conditions but very good in high grip as it can give more drive and rotation. For Cougar SV2 the wide track modification improves stability in corners and over bumps. Recommended for narrow overhang tyres such as Schumacher Minispikes, wide overhang tyres may cause a problem with width rules.