Originally Posted by SOuthernFRIED
What's the biggest spur that will fit the PRO4 without modding the chassis and upper deck??
if you're running the stock 2.5mm chassis the largest you can go without the spur protruding from the bottom is 103T.. with only a .06mm chassis clearence.
3.0mm chassis : 104T - .036mm clearance
2.5mm Chassis: 103T - .06mm clearance
2.0mm Chassis: 100T - .16mm clearance