TRIAL GEAR OIL 75W is a fully synthetic transmission oil, specially designed for the needs of trials bikes. The extreme loads placed on the clutch and transmission in trials require a blend of highly effective ā¬ā¢additives to ensure optimum, ultra-sensitive clutch response. ?ā¬ā¢embrayage. This means that constant, smooth metering is possible, even in difficult terrain and under permanent stress. TRIAL GEAR OIL 75W has been developed with GasGas!