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The Effect of Suspension on Jumping a Mountain Bike

CSEF · 2019 Applied Mechanics & Structures

Joseph R. Pelz · Gateway Middle School, Santa Cruz, Santa Cruz County

Overview

Objectives The goal of this project is to find what pressure I should have in myth rear shock on my mountain bike that will allow more hang time and distance traveled. Methods Full suspension mountain bike 4 ft jump.A camera that was able to record well. I used a Garmin Virb Ultra 30. A computer with software that can view your cameras files. Results These results show a connection between the stiffness of the rear shock and airtime on a bike jump. The average airtime with a stiff rear suspension (135 PSI) was 3.3 seconds. That was longer than the lower pressures (130 PSI = 3 seconds and 125 PSI = 2.6 seconds). The squishier suspension definitely helped cushion the landing, but it lowered the airtime and distance traveled for the bike jump. Conclusions I think I have enough data to make a strong conclusion. I did ten tests for each pressure per square inch (PSI). However I only tested three different pressures (125,130 and 135). If I had tested a wider range of pressures, or tested on different jumps, and I would have more data and could make a stronger conclusion.

Summary statement

Its about how changing the pressure in you rear shock affects the airtime and distance traveled while jumping your mountain bike

Competition history

  • CSEF 2019 Applied Mechanics & Structures · Entry J0324

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