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Off Road 2009



Four-Bar Steering Mechanism
Want to understand why a vertical steering axis eliminates the effect of the wheel steering away from its trajectory when riding over uneven pavement.
Read the PDF

Front Swing Arm
Why you'll never want to go back to a front fork.
Read more...




Upcoming Design Off-Road Kits for YZ/WR 250/450
Coming soon, check out the Blog for more info

Kit for Your Favorite Bike
We want to hear from you! Tell us which bike you'd like our engineers to tackle next.

© 2009 Tier Motorsports, LLC.