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As part of GT’s Race tuned lineup, the GT GTR Carbon Ultra Di2 road bike is as determined to win as you are, so get ready to climb to the top of the podium! Using GT’s proprietary FOC carbon fiber fabrication process to construct the frame, the GT GTR Carbon Ultra offers little to no flex, keeping power transfer and responsiveness at its best. FOC Ultra takes a minimalist approach to carbon fabrication by using the fewest layers of high-modulus carbon possible, to achieve a stiff, reliable, snappy ride, while keeping weight to a bare minimum.
Built up with Shimano’s revolutionary Ultegra Di2 (Digital Integrated Intelligence) electronic group, the GTR Carbon Ultra’s drivetrain performance would be right at home amongst the pro peloton. Shimano Ultegra Di2 technology is directly cascaded down from Shimano’s Dura-Ace Di2 group, bringing the world’s only smart electronic drivetrain to the broadest range of riders. If you’ve never had the enlightening experience of testing out Shimano Di2, you might be wondering what all the hype is about. First off, Di2 is all about its unsurpassed ease of use, meaning not only is the interface physically easier to engage, but maintenance is almost non-existent. Let us explain.
As contaminated, internally-routed cables and housing are the number-one cause of degraded shifting performance, the Di2 system replaces cables and housing that constantly need readjusting. Instead of having to replace cables (a time-consuming and costly affair), Di2 is as close as you can get to "plug-and-play" performance. Instead of cables, you have E-Tube wiring. E-Tube wiring is durable, waterproof, and requires nearly zero maintenance once you’ve set it. Additionally, there are shifting options that simply aren't possible with mechanical drivetrains, such as "satellite" auxillary shifters and multi-shift capability, to name a few. To set your custom settings, you simply plug into your PC (not Mac compatible) and let the provided E-Tube Project software take over. The E-Tube project software is mind-bogglingly user-friendly and simple to navigate, making customizing your shifting effortless. Once set, Di2 remains in tune for the life of the system, providing consistent shifting performance in any weather condition, regardless of the rider’s fatigue. Upon purchase of the GTR Carbon Ultra, the Jenson USA bike build team will update the firmware using the most current version of E-tube Project software, enabling the Multishift function. In case you aren't familiar with the Multishift function, it allows the rider the option of holding down the rear shift button and having it run through multiple gears.
Once all the techy stuff is out of the way, it 's then time to swing your leg over and get personal with Ultegra Di2. The Ultegra Di2 shifters are more ergonomic due to the fact that they don't have to be built around a mechanical system. The lower-volume shape and 10mm of reach adjustability enables proper fit for a wider range of hand sizes. As an added bonus, since there is no axial shift mechanism to reduce stiffness, the braking performance at the lever is stiffer for a more precise brake feel. Since we are creatures of habit, the shift buttons are positioned exactly the same as the mechanical Ultegra group, so no “getting used to” needed there. The biggest difference is the greatly reduced effort needed to make a shift. Instead of pushing the lever, you now merely make the same effort as clicking a computer mouse, with tactile feedback that is about the same..
Where Di2 really shines is in its derailluers. The front and rear deralleurs are programmed to communicate seamlessly to provide faster, smoother, and more accurate shifts at the touch of a button. You’ll see and feel the biggest difference over a mechanical set-up is in the front shifting. The front derailleur always knows the location of the chain on the cassette, allowing it to automatically move or trim the cage to one of 6 positions, virtually eliminating irritating chain rub. Again, there is no adjusting cable tension to compensate for increased friction, leaving little to no room for human error. One handy feature to mention about the rear derailleur is, that should you run out of battery, (which you’re given ample of indication before this should happen), the rear derailleur will automatically move the chain to the biggest sprocket, ensuring you the easiest gear for pedaling home. You should know that the rear derailleur has the capacity to handle a 28 tooth rear sprocket.
Lastly, the Shimano Ultegra Di2 uses a rechargeable Lithium Ion battery that fully charges in 90 minutes (1 ½ hour), and lasts approximately 1,000 miles before needing to be recharged. The Ultegra and Dura-Ace Di2 groups use the same battery and charger, allowing it to be used on either or. Upon purchasing the GTR Carbon Ultra, the Jenson USA bike build team will fully charge your battery so that the bike is ready to ride out of the box. The full Ultegra Di2 group weighs a scant 80 grams more than its mechanical counterpart, but when you think about less tuning-headaches and more riding, the 80 grams difference becomes obsolete.
Aside from the Di2 interface gracing the GTR Carbon Ultra, an assorted selection of other compelling components are to be found. The Shimano Ultegra WH6700 wheelset brings tubeless compatibility to the road, reducing the amount of roadside-flat-fixes. The Ritchey WCS Carbon Curve handlebar, and WCS CNC alloy stem offer a stiff, sturdy, lightweight front end. GT knows that an unhappy saddle region is an unhappy ride. Therefore, GT has gone with the legendary Fizik Arione saddle to keep you riding comfortable and racing strong.
With a lively and fast reacting monocoque carbon frame, a highly intelligent drivetrain, and a race-optimized build, the GTR Carbon Ultra is without question for those who like to go fast, really fast.
|Frame||GT F.O.C. Speed Blend Carbon Monocoque Frame, 1 1/8 to 1 1/4 taper Head Tube, BB30 and internal cable routing|
|Fork||GT Speed Blend™ Carbon with tapered 1 1/8-1 1/4 threadless Carbon steeler|
|Headset||Integrated TH sealed bearing|
|Rims||Shimano WH6700 Ultegra tubless compatible wheelset with bladed and double butted spokes, alloy nipples, 16h front/20h rear|
|Spokes||Shimano bladed and double butted|
|Hubs||Shimano Ultegra 16H|
|Tires||Vittoria Zaffiro Pro 700 x 25|
|Brakes||Tektro R741 superlight with sealed cartridge bearing pivots and cartridged brake pads|
|Brake Levers||Shimano Di2 Ultegra STI|
|Shifters||Shimano Di2 Ultegra STI 10spd|
|Front Derailleur||Shimano Di2 Ultegra braze on|
|Rear Derailleur||Shimano Di2 Ultegra 10spd|
|Crankset||FSA SL-K carbon BB30 compact 50/34 CNC rings|
|Bottom Bracket||FSA BB30|
|Cassette||Shimano Ultegra 10spd 11-28|
|Handlebar||Ritchey WCS Carbon Curve, full Carbon fiber|
|Stem||Ritchey WCS 4-Axis 44 forged/ CNC alloy|
|Saddle||Fizik Arione with Manganese Rails and Nylon Carbon reinforced top|
|Seatpost||GTR Two bolt Full Carbon|
|Seatpost Collar||Cold Forged with Nickel Finish|
Note: Components are subject to change without notice.
|Size||Extra Small||Small||Medium||Large||Extra Large||XX Large|
|Horizontal Top Tube Length||525||535||545||560||575||590|
|Seat Tube Length||470||490||510||530||550||570|
|Head Tube Length||110||120||140||160||180||200|
|Head Tube Angle||72.5°||73°||73°||73°||73.5°||73.5°|
|Seat Tube Angle||74.5°||74°||73.5°||73.5°||73°||72.5°|