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For the money, the bike comes with a full Shimano Ultegra drivetrain R and roll on a set of Mavic Cosmic elite wheels, ideal for training. You sure can, and with a set of clip-on aero extensions, you can get a feel for the TT position and some aero advantage. That said, not only will the time trial bike itself be more aerodynamic, the geometry also differs quite a bit to help you minimize your body's front-on profile — which is what creates the majority of the drag.
To start, the seat tube will be extremely steep usually around degrees , placing your derriere directly above the bottom bracket to tilt you forward.
The head tube will also be short with the armrests and extensions mounted on the top of the base bar being used to dictate the stack.
A time trial bike will also typically feature shift levers or buttons, in the age of electronic drivetrains at the end of the time trial extensions, meaning you needn't come out of the aero position every time you wish to change gear.
As we mentioned, TT and triathlon bikes are designed with the sole purpose of minimizing wind resistance and maximising efficiency.
At the front, a TT bike will have a base bar where the brake levers are mounted. This also provides support for the arm pads and extensions with the gear shifters at the end. The bike will definitely have a proprietary aero seatpost, and may even have an integrated stem, with some bikes using brand-specific cockpits too.
If it does, you will need to make sure you opt for a frame that has been UCI approved. If you're doing the local club 10, then you probably don't need storage for extra water or calories, but if you're doing a miler, it won't be comfortable or aerodynamic to stuff all those extra bottles and gels into your skinsuit pockets.
Often TT bikes are sold with cheap alloy rims. The disc or rim debate has made its way to the TT and triathlon world too. With the aero-at-all-costs mentality used for this category of bikes, we have seen quite a few proprietary integrated rim brakes that are about as useful as a road tyre is to a downhill bike.
Not only do discs offer more power and modulation in all weather conditions, but wind tunnel testing also shows the aerodynamic impact is minimal to none.
What's more, when it comes to the complex integrated cable routing of the best time trial bikes, these tight corners cause friction to cables and a subsequent loss in performance. Hydraulic hoses don't suffer from this friction, meaning performance doesn't degrade over time.
The same argument can be made in favour of electronic or wireless groupsets. Given time trialing is a race against the clock, it's important to remember that you're chasing speed, not just aerodynamics. Therefore, while you might want to ride in the most aerodynamic position possible, you might find this position causes a loss in available power output.
Therefore, it's important to balance power and speed to find an optimal balance. To that end, a time trial bike that's fast on paper, but with a lack of available adjustment, could force you into a position that is actually slower than a less-aerodynamic bike. The best way to size up any bike is to have a professional bike fit. Alongside that, check the stack and reach of the frame to compare against existing bikes.
However, a good starting point with time trial bikes is to go for a size smaller than a typical road bike size. To set your time trial position from scratch, you'll need some trial and error.
Try to find the lowest position that is both comfortable and allows you to see ahead. A narrower position offers less control against crosswinds, so start wide, but gradually work inwards to a comfortable, safe, narrow position.
TT position is a term used to describe a rider's body position when riding a time trial bike with their arms on the extensions. It is considered the most aerodynamic position available where pedaling remains possible. Over flat terrain, a time trial bike is theoretically faster than a road bike, however there are certain factors to consider.
It is not uncommon for a rider's sustainable power to be lower in the time trial position, and if a rider is unable to sustain the same power, this could offset the aerodynamic improvement. Once the gradient of the road rises, there is another balance to strike. A time trial bike will typically be heavier than a road bike, and the tipping point at which the aerodynamics is trumped by reduced weight is around six per cent. Anything below this and the time trial bike will likely be faster. This very much depends on what sort of racing you typically do.
If you partake in frequent time trial events over flat terrain, then assuming you are able to output the same power in the time trial position, the aerodynamic savings will certainly benefit you in competition on a regular basis. Will the new course record stand the test of time? The finish line is at the cul-de-sac on the bike path for Vail Pass. Asset Final start times will be assigned by category and posted on the event website by PM on Saturday, June Athletes are responsible to know their own start time and check-in at the start at least 15 minutes prior to their start time.
Racers will be sent out in 30 second intervals Open Categories may be slotted in 1 minute intervals.
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