The roller belt creates the drive mechanism between the middle and front rollers and is essential for safe roller use. Our belt is manufactured from a soft elastomer which ensures a no-slip drive link between the two rollers. Under normal use at room temperature, they should last thousands of miles. We do not require that they be de-tensioned when the rollers are not in use. If you break the belt or it stretches to the point where it begins to squeal, it can be replaced in minutes using a hex wrench. Please refer to our User Manual for step by step instructions.