23mm Trek ABP nut on a 2017 Top FuelUsing a 23 mm socket to remove the ABP nutDrive side nut removedRemoving the non-drive side nutSeat stays and chain stays can now be split in twoClean any dirt and apply greaseThe grease will protect against water and help the washer stick for re-assemblyPut the washer backInsert the non-drive side sleeve