1. Mountain Bike Rear Suspension David Harris Chris Polinsky Luther Beale Heather Landis Faculty Advisor: Dr. Chien Wern

2. The Process 1. What is the Goal 2. What are the Options 3. How do Concepts Compare 4. Selecting a Concept 5. Pros and Cons

3. What is the Goal Comfortable ride over varied terrain Minimize effects of rider inputs Provide a suspension that maintains a consistent level of efficiency

4. Concepts Linkage System Active Control System Motor Flexible Wheel Swing Arm System Flexible Member

5. CriteriaImportance (1-5) Performance5 Not pedal activated5 Adjustable3 Rearward Path3 Absorbs bumps5 Constant seat height3 Minimize chain growth3 Ease of implementation4 Ease of maintenance2 Light weight4 Ease of manufacturing2 Aesthetics3 Innovative5 PDS Criteria

6. Results of Concept Analysis

7. Final Selection Key Points Strengths –Multiple Axle Paths –Higher Performance Weaknesses –Chain Growth –Increasing Complexity with # of Links

8. Conclusion A Linkage Based Suspension System