1. COLLAPSIBLE SKI-BIKE Final Presentation 6/2/2016 Group Members:
Jesse Harris
Sheik Ameen
Brian McShane
Nicholas Pauly
Ekendra Goravani
Nha Nguyen

2. Project Background
Project Statement: Make improvements to functionality of 2015 model.
Design Goals:
Improve pack-ability
Add a braking system
Reduce weight
Limit loose parts
Budget: $1000

3. 2015 Test Results The Good The Bad The Ugly
The overall rider geometry worked well and it was comfortable to ride.
The Bad
The air shock stopped working after a few minutes of testing.
The foot pegs rotated around.
The Ugly
Very awkward to transport.
Sharp corners posed threat.

4. External Search Other commercially available ski-bikes:
Mostly out of Europe, but some from Colorado
Seats and suspension were common throughout
Brakes were considered add on feature
Prices ranged from $1500-$5000
NONE WERE COLLAPSIBLE
Off the shelf components:
Headset Bearing
Suspension
Swing Arm Bushing
Handlebar, stem, and riser
Levers and skewers

5. Frame Concepts

6. Internal Search Design Considerations Structural Design Price
Availability
Weight
Strength
Structural Design
Round vs square tube
Fit and function
Tooling capability
Rigidity

7. Design Materials Frame and swing arm: 6061-T6 Aluminum
Frame - 2” x 6” x 0.125”
Swing arm – 1” x 2” x 0.125”
CrMo 4130 Steel fork ” wall thickness
Steel, aluminum, plastic suspension
Chris King Headset aluminum
Phenolic Bushing
Titanium Pins
Aluminum Handlebar and footpegs
Stainless steel brakes

8. Manufacturing Process
Milling
Turning
Brazing
Welding
Tapping

9. Final Design Highlights Removable handlebars Fork drops out
Swing arm folds under
Multiple shock orientations
User Friendly Bindings

10. Final Design

11. Brakes & Bindings Stainless steel plate bent and welded
Pointed tips and plows are effective in powder and ice
Very easy to actuate with hand brake lever
No clearance issues
Binding interface simpler

12. Suspension System RockShox Kage R Plastic bushings with titanium pins
300# & 600# springs
Preload adjustment
Damping adjustment
Multiple orientations for multiple riders

13. Headtube, Riser, & Stem Removable Vertical skewer within stem riser
Two cam levers clamp riser to fork

14. Final Specs Weight: 17.1 lbs Price: $911 Volume: 4” x 8” x 32”
Only 5 lbs heavier than last years model
Price: $911
$89 under budget with potential to reduce
Volume: 4” x 8” x 32”
Fits easily into large backpack

15. Questions
Future testing runs to be scheduled.