Used to lower the rear up to 40mm (1.5"); depending on standard model height. A great solution to easily reach the ground for shorter riders and; regardless of length; cool looks for all. Permanent modifications not required. - Lowers the bike up to 40 mm (1.5") - Includes pre-installed new bearings - Includes installation instructions - Kit does not require to shorten the threaded rod - Requires the use of a M8 shock compression tool - This comes with approval Note: The shock spring must be compressed for installation for which a shock compression tool is required; like Kodlin 963489 or similar.Note: Check your local MCS dealer or the MCS sales department for exact type of approval and validity on bike model and years on the test report.