Butter Suspension
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Butter Suspension is me, Greg Mackenzie. I've been a bicycle mechanic at various shops in the Greater Seattle Area since 1994. I worked at Accell NA as the Rockshox Factory Service technician until Seattle Bike Supply was sold to a distributor in another state. I saw the need for professional bicycle suspension service so I started Butter Suspension. My job is to help shops and riders understand their suspension and get the best performance from their bikes. I currently service Rockshox forks, rear shocks and Reverb posts, Fox forx and rear shocks, KS posts and Specialized Command posts. I'm always looking to add to my services list so if you have a fork or shock that needs service, get in touch and i'll see what can be done.




All estimates are free and flexible according to materials and scheduling.



The hallmark of great service is not how someone performs the initial work, but how it gets addressed when something doesn’t go as expected. Such was the case when Greg overhauled my 8 year old shocks. Not a straightforward job and one other shops discouraged, so when after the rebuild, I ran into issues, I wasn’t entirely unsurprised. Greg, however, immediately owned it and dug into his treasure trove of older parts and converted my shock so I can get the additional years I hoped for—all at no additional cost, quickly and with his trademark enthusiasm. Greg and Butter Suspension rock!
— Wynn White, Portola Valley, CA
Butter Suspension is a great company to work with! After contacting Greg M. via fb, I sent a Reverb dropper post to him to be rebuilt due to the common ‘sag’ issue. He received the post on a Monday—had it rebuilt and back in transit to me in AZ the next day—fantastic turnaround. Post is now rock solid. Anyone needing maintenance done on their Reverb post would be smart to look him up as an alternative option to sending it back to SRAM for a rebuild.
— Joel Barndt
Best mechanic hands down. Greg knows everything and anything that has to do with bikes. He’s been in the industry forever and actually loves what he does which is part of why he’s so good at it. Can’t recommend enough.
— Łukasz Stankiewicz
Everyone has a plan until they get punched in the mouth.
— Michael Tyson



I’ll only work with the best materials available and provide a 60 day guarantee on all labor. I never compromise quality for time and give my clients realistic schedules that accommodate their lives. I strive for honest customer service, so contracts are only paid in full when the finished work is to your complete satisfaction.



Where is butter?

I have partnered with Dave and the crew down at Center Cycle. This allows me to focus on quality repairs and tuning with quick turnaround.