RC8B4 Differential Gear Set, 20mm HTC Bearings while the larger diameter hole

while the larger diameter hole allows for smoother diff action without the thrust dragging on the diff screw

L/XL = 7 1/4" to 7 5/8" inch diameter

2 Upper Titanium Screw Set

check setting

6mm hole in the rear pistons

RC8B4 Differential Gear Set, 20mm HTC Bearings while the larger diameter holePart Number: ASC81380 These are the OG 20mm HTC gears for maximum drag, hot weather, European racing. HTC gearing with 20mm Sun Gear for locking diff Schelle red o rings for diff recommended Typical shimming is pumpkins 22. 95 and over use the 4 planet shims. 22. 90 and under use none. Fits: RC8B4. 1, RC8B4. 1e, RC8T4 and T4e. Recommended: High Grip European tracks, no dust, no bumps Oil Tips. front and rear, ebuggy and nitro: 7 front 4 rear low grip.