SRAM vs Princeton Carbon Works: The End of the 5-Year Patent Battle Over Zipp 454 NSW Wheels (2026)

A legal saga that has spanned five years has finally come to a close, with SRAM's decision to drop its appeal against Princeton Carbon Works. This move has left Princeton feeling 'validated' and ready to move forward with their innovative designs.

The dispute centered around the unique rim designs of Princeton's performance wheels, which SRAM claimed infringed upon their patented technology. Specifically, SRAM alleged that Princeton's wavy rim shape, which is said to reduce drag and side forces, was too similar to their own Zipp 454 Carbon NSW wheels.

But here's where it gets controversial: a Florida jury ruled in February 2023 that Princeton had not violated either of SRAM's patents. Despite this, SRAM appealed, prolonging the legal battle. However, SRAM's recent decision to drop the appeal has put an end to the dispute.

Princeton, established by engineering graduates from Princeton University, has expressed their happiness and validation with the outcome. They are now looking forward to continuing their innovative journey and providing high-performance wheels to their athletes and customers.

The Zipp 454 Carbon NSW wheels, at the heart of this dispute, rely on two patents from inventor Dimitris Katsanis. Interestingly, SRAM's patented rim design was inspired by the humpback whale, with a 1995 article on the hydrodynamics of whale flippers cited in the patent.

On the other hand, Princeton's Wake 6560 design is the result of four years of development, featuring 24 sinusoidal oscillations with varying depths. While both rims have varying depths, Princeton's design is more symmetrical, unlike the sawtooth-like shape of the Zipp rim.

In their initial complaint, SRAM alleged that Princeton was aware of the patent and continued to market their wheels, requesting tripled damages and the destruction of remaining inventory. However, the jury's ruling in favor of Princeton has now been upheld, bringing an end to this long-standing legal battle.

SRAM has declined to comment on the matter.

So, what do you think? Is this a fair outcome, or should SRAM have pursued the appeal further? We'd love to hear your thoughts in the comments!

SRAM vs Princeton Carbon Works: The End of the 5-Year Patent Battle Over Zipp 454 NSW Wheels (2026)
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