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 fit bike, 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 TTFitBike, 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 Fitbike 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?

  • 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

  • MB, in-person fit and custom Fuji Norcom Straight

    MB, in-person fit and custom Fuji Norcom Straight

    “Just wanted to give you a heads up on the race yesterday:
    The bike was amazing!!! I’ve never felt so strong in a race, and overtook soooo many athletes!
    Finished the bike in 2.49, 7th time in my 30-34 AG, which I am very very happy with, for my first race this season and first 70.3. Above all, my legs felt great after the bike and I could continue with a decent run and negative split! Happy. Thanks for the great fitting! “- MB, in-person fit and custom Fuji Norcom Straight

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:

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Great pic from Ventum's current Lava ad of Leanda Cave on her Ventum One with her TTBikeFit fit - what an improvemnt over her past couple of bikes and fits! The wind tunnel certainly liked this setup better. ... See MoreSee Less

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Inexpensive power meters $399: Stages found some more Dura-Ace 7900 crank arms, and now have their new slimmer housing power meters attached (pic shows old housing) to a limited number of remaining inventory. I am ordering some of these in the next day or so - contact me if interested. All lengths available 165-180mm, Works with ANY Shimano Hollowtech 2 crankset. ... See MoreSee Less

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Finally got it done - Kona Ironman World Championships pro men near the end of the bike leg on the Queen K in super slo-mo. All of the top-ten finishers plus many more. Left the sound on in this one. Be sure to watch in HD! #kona2015

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