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:

TTBikeFit shared a post. ... See MoreSee Less

2012 Limited Blue Triad SL size S (~52cm) NEW COMPONENTS $3,000 - Barrington, RI (02806) We are relisting this - we removed the old 10spd Di2 (still shown in the pics) and will replace it with YOUR CHOICE of NEW Ultegra Di2 or Sram Red Etap! I won my age group in Kona 2013 with this bike and also Ironman Texas 2015; selling because of new sponsorship. Never been used on indoor trainer nor crashed. Other NEW components:ISM saddle, Conti tires, chain, Vision Trimax crankset (170mm 52/38) bottom bracket, TRP front brake. Used components HED Belgium C2 training wheels, TriRig Omega rear brake, 2 sets of aerobar extensions included (S-bend and ski-bend). Your choice of cassette. Built and maintained by TTBikeFit. $3000 with Ultegra Di2, $3200 with Sram Red Etap. Please PM if interested.

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Very Interesting Performance/Recovery tool: Fascial Stretch Therapy. After Lis took the overall at a local sprint yesterday, her coach Al Lyman of Pursuit Athletic Performance stopped by to give us a taste of this new therapy. I think most folks could benefit from this as a compliment to massage etc. With FST you are constantly moving in an effort to free up the fascial net. I can tell you that you feel really great after this, and a series of treatments can potentially help improve performance and address problem areas. ... See MoreSee Less

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SIngle best cycling safety investment you can make after a helmet: a daytime headlight flasher. Nearly everyone I know who has had an accident lately involving a motorist was hit by an oncoming car making a left turn in front of them in broad daylight. Most recent examples were both elderly drivers. One cost a friend his collarbone and IM Canada race barely a week out. We all know how distracted most drivers are. If you are hurtling towards someone in the right gutter, they just don't see you - especially if there is shade or other confusing visual distractions. They are looking for oncoming vehicles (if they are looking at all), and probably either can't see well to begin with and/or are texting/talking/pokemon-ing and/or they drive a pickup in which case they are probably trying to hit you anyway. Daylight flashers make you nearly impossible to miss (visually!). They are clearly visible from a half mile away. Get one. They don't cost that much, are rechargeable and typically run for +- 12 hours on a charge. We use Cygolite Dash's and never ride without them anymore. We carry them in the Shop too of course! ... See MoreSee Less

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Need a trainer - the BEST trainer as used by Froom-ie himself? Wahoo allowing us to discount KICKR's for one day only: $1079 vs 1199 normally. Yes we have them in stock. Start using Zwift etc today.... ... See MoreSee Less

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