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?

  • Meg Pennington – Custom bike builds and fitting

    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 your incredible talent getting such a good fit!!”

  • Marc Eves – in-person Fit on Vertex Fit Cycle

    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

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

    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

  • EC – In-person Fit

    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 actually climbing better too! I raced the Cedar Lake Triathlon (a local super sprint that takes place every other Thursday night through the Summer) and I actually PRd the bike course and felt fantastic coming off the bike and onto the run!
    You have a gift. THANK YOU, THANK YOU! – EC – In-person Fit

  • NW – Multiple in-person fits and custom Kestrels

    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 custom Kestrels

The Vertex Fit Cycle by TTBikeFit

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. We plan to sell initially very limited numbers of the Vertex to interested fitters, coaches, and teams. Please contact us if interested.

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

Wow guess I better chill on the holiday snacks already. Amazing that I found a way to be even slower at cross - ride a good chunk of the last lap standing up while holding your saddle due to carbon post malfunction. Snapped like a twig on one of the steeps. ... See MoreSee Less

View on Facebook

Need Cross/MTB/winter shoes? Have a pair of Northwave Hammer CX that didn't fit me: new, dirt cheap for $60. Neoprene lined with ankle cuff these are great for any wet/cold riding. Come with spikes. They are size 46 BUT they run quite small. I am 12 street shoe 13 running shoe - so they probably fit if you wear 11/12. They are going back in a few days if no one wants them. ... See MoreSee Less

View on Facebook

One thing's for certain about the Ventum One: it has an anti-wind force field generator. 30mph winds with gust to 40 today and here I am riding into a cross-headwind while aero and holding my phone. Notice I am not swerving or getting buffeted (unlike another some other superbikes in Kona this year). It is borderline strange that it feels like there isn't a bike underneath you. You only feel the wind hitting your body. Now I only had my trusty Hed Ardennes training wheels on so deep rims would have been a bit tougher but still. I wish the mic on my phone worked as the wind noise would've been deafening. I was trying to get the sideways-flying leaves and leaf/dust devils in the background but wasn't too successful. I did get a dog that barked at me - good thing he stayed in his yard. Good boy! ... See MoreSee Less

View on Facebook

The TTBikeFit BLOG Latest Posts

Go to the TTBikeFit BLOG