For R/C Differentials: Arrowmax am-210031 100.000cst 59ml Silicone Fluid  [am-210031]

Control diff locking with silicone viscosity

The Arrowmax am-210031 is supplied as a 59ml bottle of silicone diff fluid rated at 100.000cst and intended for use in R/C scale differentials. It is applied as a tuning medium to influence how torque is distributed to the wheels, which changes corner entry, mid-corner balance and traction transitions.

The oil provides viscous coupling inside sealed or rebuildable diffs; increasing viscosity raises slip resistance and yields a firmer, more locked behaviour, while lighter oils allow freer differential action. Use this fluid only in R/C differentials and compatible small-scale drivetrains.

Service notes: follow your chassis disassembly instructions to drain or open the diff, refill with Arrowmax am-210031 and perform the recommended bleed and reassembly routine to remove air. Carry out the work in a clean area, wear gloves and wipe any excess fluid from gear surfaces and seals.

Compatibility and testing: consider diff oil alongside tyres, suspension and gear ratios when setting up. Run incremental changes, test under consistent conditions and keep notes on viscosity vs observed handling to refine your setup.