- #Specialized body geometry x y measurement tool how to
- #Specialized body geometry x y measurement tool pro
They shift to a small, medium, large system that is hard to correlate to a normal road bike size. “If you ride a 56 road frame you should choose a 56 Slice frame.”īut with Trek and Specialized the water gets murky. The actual dimensions are clearly listed in the geometry table and they are indeed smaller than the designated size. Simply go by the size sticker, or measure the head tube and look it up in the above chart.”Ĭannondale does a good job as well. This means that the frame size is no longer equivalent to the seat tube length, so don't determine the size that way. "All our TT/tri bikes have a dropped top tube and shortened head tube to enable the rider to position the aerobars low enough for a proper aero position. Cervelo does a good job of explaining their tri bike geometry… The trick is to study the manufacturer’s geometry specs and try to glean the actual measurements of the bike. If I try to apply my position to the 56 P2C it is difficult for me to get the bars high enough or the reach long enough (more on this later). Indeed the Cervelo P2C tri bike in size 58 fits me correctly and is smaller than my road bike. The following table illustrates how a 58 cm Cervelo tri bike is already smaller than a 58 Cervelo road bike. If you (or your bike shop) automatically choose to go down a size and the manufacturer has already done this you will most be on a frame that is too small.įor example I normally ride a 58 cm Cervelo road bike. But what most people don’t understand is that the majority of bike manufacturers have already compensated for this and have already reduced the size of the frame to make it appropriate for a tri position. In general the dimensions of a properly fit tri bike are normally smaller than a rider’s road bike as the goal is get your body in a position that makes you lower on the front of the bike with roughly the same seat height. The first misconception is that a tri bike size should be smaller than your road bike size. The steeper the seat tube-angle the better.
#Specialized body geometry x y measurement tool pro
Buy the same size frame your favorite pro rides.ģ.
Buy a tri bike one size smaller than your road bike.Ģ.
#Specialized body geometry x y measurement tool how to
The scope of this article is not to explain how to determine the proper dimensions for your tri frame, but to debunk three common tri bike fitting misconceptions that lead to poor fit.ġ. If you are experiencing any of these problems, read on. These problems are mostly related to the bike being too small and the bars too low relative to the seat height.ĭo you have trouble staying in the aero position for an extended period of time? Do you hate riding your tri bike and feel more comfortable on your road bike? Do you find yourself sitting up and holding on tops of the aero pads with your hands? These are all symptoms of a tri bike that is too small.
And even though I have seen my share of bad road bikes fits, there seems to be an epidemic of problems with tri bike sizing. Debunking Three Tri Bike Fitting Myths by Greg PelicanĪfter 9 years of bike fitting I have seen it all.
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