Trim Brake

A trim brake is a braking mechanism placed mid-course on a roller coaster to reduce the train's speed before a specific section — unlike a block brake, it does not stop the train completely. Trim brakes are used to manage G-forces on demanding elements, reduce structural wear on the track, meet noise or vibration limits, or simply ensure the ride operates safely in all temperature and weight conditions.

Enthusiasts have a complex relationship with trim brakes: they are often criticised for dampening a ride's energy, particularly when they reduce the speed approaching airtime hills or inversions that were designed to be hit at higher velocity. Whether a trim brake is active can vary by season (cold weather produces more brake engagement), train loading, and park policy. Some coasters have been observed to run dramatically better when trims are light — making the same layout feel like a different ride depending on conditions. Monitoring enthusiast reports can indicate whether trims are running heavily or lightly on a given day.