I believe the early ones had a proprietary post, and the later ones uses a Ritchey head clamping system. I had the early one, and the saddle would always tip, and over time strip the carbon grooves on the post where the aluminum clamp interfaced with the carbon post. Terrible set up. I have neither, I only mention the difference so you can specify which one you're looking for in particular. Good luck.

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I wanna go fast!

Thanks, mine is like this one:

I've got a few. I worked at Guru. Hit me up
joey@insayne-kustomz.com

Hi - did you find a source for the GURU seatpost? I need to buy a seatpost for a GURU Magis. Thanks.

Email the gentleman above, he may have the post for your frame.