Dialing in suspension setup can make the difference between a bike that feels unpredictable and one that tracks confidently through every corner and trail feature. The Slacker MTB Starter Suspension Tuning Kit is designed to simplify that process. This digital sag tool measures suspension movement directly at the axle, helping riders achieve accurate bike suspension setup without guesswork. Using the slacker sag tool, riders can measure sag while seated on the bike, making it possible to complete setup without a second person. The system attaches to the rear axle and connects to the bike using the included mounting accessories, allowing riders to view real-time measurements through the Slacker smartphone app. This measurement tool tracks suspension movement so riders can properly set rear suspension sag for a mountain bike or dirt bike. Designed as a practical bike tool for riders who tune their own bikes, the system helps maintain consistent suspension setup across different trails and riding conditions. Whether preparing a mountain bike for technical terrain or checking sag on dirt bike suspension before a ride, the sag tool provides clear and repeatable readings that support confident suspension setup. Slacker focuses on thoughtful design and functional suspension tools that help riders understand and tune their bikes more effectively. The compact device, portable mounting accessories, and simple setup create a suspension tool that fits easily into regular bike tools and maintenance routines. With the Slacker MTB Starter Suspension Tuning Kit, riders gain a reliable way to measure sag, understand bike suspension movement, and maintain consistent suspension setup so every ride starts with a properly tuned bike.