Aero Bike Fit Specialists

The Right Aero Bike Fit for YOU – Guaranteed

We have been competing for more than 20 years, and as Engineers have studied and experimented with bike fit from day one. We have created our own fit protocols, philosophy, and tools, including our patented automated fitbike. We pioneered online fitting.  We focus on aero – triathlon and time trial – bike fitting. We do road bike fits too, but aero is our heart and soul.  Thousands of happy clients and countless victories later, we still keep learning and honing our craft every day.

We stand behind and have pride in our work. It actually matters to us that our services help YOU have the best athletic experience possible. Looking for the right tri bike? We will find it for you. If you have a bike already we will make sure your fit is optimized. Either way, you will LOVE your bike. That is our money-back pledge. If something isn’t right, we will fix it or give you a full refund on any and all fitting charges. No bull. Please talk to any of our thousands of customers. Talk to the coaches who send us their athletes. We look forward to working with you.




Motion Analysis Bike Fitting

Aero and Road

Aero and Road

Visit us in out fit studio in Warren, RI for a comprehensive fit session. We use digital video motion analysis, Spin Scan, our proprietary automated Vertex Fit Cycle, and a rotating fit platform along with out decades of experience as competitors and fitters to ensure the best outcome for you.


Online Bike Fitting

Aero and Road

Aero and Road

Can’t visit us in person? Send us a video and we will use the same digital video motion analysis we use in-house to give you a great bike fit. We will send back a narrated video explaining what you need to change, and go back and forth until you are satisfied. 


Prebuy Fitting - In Person or Online

Aero and Road

Aero and Road

Planning to invest in a new bike? Don’t make an expensive mistake – make sure you get a bike that works best for YOUR fit. Visit us in RI and we will put you on the Vertex Fit Cycle, dial in your fit, and provide a list of specific bikes and sizes that will fit you well. No bias – you get a list of all appropriate bikes. Looking for a “Super Bike”? We have proprietary calculators that determine the exact configuration that works for your fit – no guesswork – build the bike right the first time.  And yes – we also can do this online via video, even if you don’t have a tri bike. 


Bike Sales and Custom Builds

Aero and Road

Aero and Road

While we are first and foremost fitters, we do sell and custom build bikes. Or we will customize your bike for the fit and performance you are looking for. Extensive experience with electronic shifting conversions and builds. 


PRO: Bike Fit Systems and Services

Our Own Designs

Our Own Designs

We have created our own patented, automated Vertex Fit Cycle and fit systems. Soon we will be making our designs available to shops, fitters, coaches and training centers. Want to get a bike fit certification? Well, we don’t believe you can become a fitter in two days. But look for comprehensive fitting apprenticeship programs coming soon. We are accepting indications of interest now. Note that applicants will need to be accepted into this program based on background and technical ability. 


PRO: Consulting Services

Product and Fit

If you are a firm that produces bicycle components or frames, and would like a fitter/engineer’s assistance with geometry and ergonomics, please




What Do Our Clients Say?

  • meganPSLice1

    Meg Pennington – Custom bike builds and fitting

    “I wanted to thank you for such an amazing build and fit you did with my Cannondale!! I truly had an absolute blast riding it at the Lake Placid Ironman – and I’m excited to tackle the distance again to apply what I learned. I would not have had such a successful first Ironman without […]

  • marceves

    Marc Eves – in-person Fit on Vertex Fit Cycle

    My fitting from last fall won the bike leg in my age group at Ironman Lake Placid, and placed 3rd in my age group to qualify for Kona! Thanks for the fit! See you in hawaii! – in-person Fit on Vertex Fit Cycle

  • patMcCrannIMTX

    Pat McCrann, Endurance Nation – Multiple in-person fits, custom bike build

    Can’t say enough good things about what you have done for my bike fit and overall performance. Hard to believe you can keep finding more speed for me…thanks!!! (2015 IMTX 5th overall amateur, 4:44 bike split) – Pat McCrann, Endurance Nation – Multiple in-person fits, custom bike build

  • ECole

    EC – In-person Fit

    I wanted to send you an email just to let you know how GREAT my “new” bike (fit) is! I rode over 100 miles on it last weekend, after the fit, and felt so strong and comfortable. I’m so shocked how effortless the power and speed are now (especially when I’m in aero). And, I’m […]

  • NeilWbike

    NW – Multiple in-person fits and custom Kestrels

    “Just wanted to say thanks for selling me another great bike! My new Kestrel worked great in St. Croix and I got another Kona spot, despite a very choppy swim, strong winds on the bike and heat on the run. For me, it’s still all about the bike”. – NW – Multiple in-person fits and […]

The Vertex Fit Cycle by TTBikeFit – Available NOW (October 2017)

We developed and patented the Vertex Fit Cycle because we could not find a satisfactory fit platform on the market. Frankly, we cannot imagine fitting without this amazing machine. The Vertex is the ONLY fitbike that keeps the rider stationary and move the contact points around the rider. This allows us to easily change one fit variable while keeping other variable constant. Traditional fitbike designs cannot do this since the saddle and rider move. After working with our production prototype (shown in the lower 2 videos) for 2 years in our studio, we are finally ready to release the production version. We plan to sell initially very limited numbers of the Vertex to select fitters, coaches, and teams. Please see vertexfitsystems.com for more info or contact us if interested.

Our YouTube Channel has millions of views! Some Favorite Videos:

#vertexfitcycle and Marc at The Energy Lab save another rider from bike fit hell. He is oh so right about the all-too-common bike shop "road bike fit on a tri bike". This guy is going to fly compared to his previous fit. That includes the run too. ... See MoreSee Less

Friend and fellow member of the Ultraman Florida ohana, Ryan Toner, stopped by the Lab yesterday to get fit on his new Felt IA. This may go down as one of the greatest fit transformations to date! It was a formidable task, but armed with TTBikeFit's Vertex Fit Cycle, The Energy Lab was up for the challenge! Ryan's original fit is an extreme example of the all too common "road-bike-triathlon-fit". He was sitting at a shallow effective seat angle of 73 degrees with a ridiculously long reach, closed hip angle, and saddle height over 5 cm too low! Yes, he actually road this position for 170 miles on Day 2 of Ultraman Florida! Grab some popcorn, sit back, relax, and enjoy the show . . .

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Nice looking fit on a super-sleek PremierBike Tactical. Yes we can help you get one of these, but make no mistake they are no-holds-barred long and low TT machine (stack 53 reach 45cm on the size L). We of course used the Vertex Fit Cycle to dial in the fit first and make sure it would work on a Premier without needing to hit the extremes of the fit envelope. A big part of the bike's aero advanatge is the uber-clean front end (flush stem/top tube, thin and broad-chord base bar) meaning you only have so much adjustment range, and you really don't want to be putting too many more risers under the aerobars than the 4cm we have here (even though you can). No denying the value of the complete package with wheels, power meter, and bike case. Check out our Instagram for some pics. ... See MoreSee Less

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More great work by Marc at the The Energy Lab using his Vertex Fit Cycle! ... See MoreSee Less

Great fit session with Stuart​ "The Professor" Selber last Friday! Stuart was originally fit at TTBikeFit ​headquarters in RI. After getting a new frame, aerobar/front-end, and trying several different saddles, Stuart's position had unintentionally changed and was far from the fit received at the hands of master fitter Todd Kenyon. Impressed with his past experience on the Vertex Fit Cycle, Stuart made the trip from State College to the only other Vertex in operation in the U.S. at The Energy Lab. Although his position wasn't terrible, we made some significant changes. We switched from 172.5mm to 165mm cranks and moved him forward and down (essentially rotating his current position) around the bottom bracket. We also tested several saddles and gave him a bit of rise in the forearms by utilizing Zipp Evo 110 extensions, all of which provided for a more comfortable and aero position. Check out his fit transformation in the below vid . . .

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This is incredibly important if you want to go fast in the TT position. All the big boys(girls) have it. Froome, Frodeno, Wurf, Kienle, Olsen Kenyon. Most amateurs don't (unless I have fit you).Only bike fit geeks should click on this - I tried to keep it super short but 15 mins is the best I could do. Of course the Vertex Fit Cycle is used to demonstrate the concept in a way only it can. ... See MoreSee Less

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