Tri Better Triathlon Shoe
Team Members:
Ryan Wilson
Cody Woods
Nate Morefield
Mike Kurvach
Agenda
Project Mission
Background
Design Objectives
Concept Selection Process
Concepts
Comparison
Schedule
Design Review Purpose
Obtain Feedback on Design Concepts
Identify Design Problems
Project Mission
The purpose of this project is to design a triathlon
shoe for competition by combining the advantages of
a cycling shoe and a running shoe.
When successful this project will reduce transition
times while maintaining running and cycling
performance.
Background
Triathlon-Swim, Bike, Run
Sprint Distance- 750m Swim, 20k Bike, 5k Run
Olympic Distance- 1.5k Swim, 40k Bike, 10k Run
Transitions:
T1- Swim to Bike
T2- Bike to Run
Current Situation
Pearl Izumi Tri Fly IV
Zoot Ultra Race 3.0
Pedal Cages
Key Objectives in Design
Flexibility During Running
Good Power Output During Cycling
Secure Attachment to Bike Pedal
Ability to Clip Out of Pedal with Ease
Provide Float
Ultimate Goal is to reduce transition times without
hurting cycling or running performance
Concept Selection Process
Concept Selection Process
Good Power Output Dur
Concept 1
-Full Length Pedal
-Internal Forefoot CClip
-Heel Clip
Advantages:
-Rigid Plate Provides
Stiffness only when
Cycling
-Easy to clip out and
Transition to Running
Disadvantages:
-Rubber Sole Hinders
Float
-Forefoot Clip
Components will Add
Stiffness During
Running
-Large Pedals Add
Weight to Design
-Clipping in Requires
Two Motions
-EVA Foam will
Dampen Energy
Transfer During Cycling
Risks:
-High Weight:
Estimated Weight
330g per Shoe
270g per Pedal
-Difficulty Working
with Carbon Fiber
-Energy lost in cycling
due to deformation
Concept 2
-Removable Rigid Fork
-Pedal/Fork Interfacing
Clip
Advantages:
-Ridged Insert is
Removed During Run
-Compact Pedal
-Simple Clipping
Concept
Disadvantages:
-Void in the Shoe After
Removing Insert
-Lost Energy From EVA
Foam Dampening
During Cycling
-High Stress on Fork
Could Cause Failure or
Deformation
Risks:
-High Stress on Fork:
580 MPa in Tension
-Aligning Fork and Clip
Difficulty
-Biomechanical Issues
During Run
-Failure to distribute
pressure from foot
-Removing and
inserting fork may be
difficult
Concept 3
-Rigid “Hinged” Plate
-Low Profile Mini Clip
Advantages:
-Hinged Plate Reduces
Excess Movement
While Cycling
-Hinged Plate Flexes
While Running
-Pedal Engages Rigid
Plate
Disadvantages:
-Lost EVA Foam
Volume for Pedal Clip
-Constrained Flexibility
While Running
Risks:
-Determining the Flex
Points Common for All
Athletes may Prove
Difficult
-Maybe too Stiff for
Running but too
Flexible for Cycling
-Failure to distribute
pressure from clip
Comparison
Schedule
System Design Weeks 4-5
Resource Summary Data Base Weeks 4-5
Analysis Weeks 4-8
Detailed Design Weeks 4-8
Detailed Design Review Week 9
Order Materials Week 10