Just installed progressive springs for front fork with specific oil and also for rear shock. Since we don't have adjustable suspensions, (other than rear preload), I went this route. Improvement is significant for me in all aspects for handling and ride, especially when riding hard. If you're a heavier rider this is one to consider if you like to carve. Our bikes were designed to accommodate a wide range of riders and softer is not better..............IMO (under $300 for kit).