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2007 gt idrive 4.0 mountain bike specs11/18/2023 ![]() ![]() ![]() Looking at the geometry, the head angle and the seat angle stand out immediately. The head angle of the Sensor is 66 ° – 65.5 ° – very, very slack for a 29 “trail bike. The saddle angle is also extremely steep, with a value of 76 ° – 76.5 ° . There is ample space for tools and a water bolttle cage, and a flip chip allows you to vary the geometry between higher BB/steeper head angle, and lower/slacker. The first and most important change is the wheel diameter, now 29 “. The rear travel is 130mm, combined with a 130mm fork. The new Sensor completely redesigns its look with important changes, in addition to the suspension scheme we talked about before. The frame will be available in both aluminum and carbon, with an important novelty: the carbon frame will have only the main triangle in carbon, the rear end and the linkage will be in aluminum . The reasons for this choice are essentially twofold: the aluminum rear end resists impacts better and is more durable, secondly it costs less and allowed GT to keep a lower complete bike price. The rear shock has a Trunnion upper mount, on bearings and with the damper placed between the linkage. This allows the use of a longer shock stroke and helps make the most of the improved smoothness and durability of the bearing mount.Ī lot of work has been done on the chassis’ linkage hardware and pivots, completely redesigned, reinforced and with sturdy MAX Enduro bearings. We all know the delicacy of the old I-Drive hardware, and the GT engineers have worked to avoid this kind of problem. The maintenance of the frame is now extremely simple.Īccording to the GT tradition, the cable passage is completely external , for easier maintenance. In order not to compromise the aesthetics of the bicycle, on the upper part of the downtube of the carbon frame a space has been created to house tubes and hoses called the groove tube . The value of anti squat has been optimized to ensure maximum traction, without giving too much emphasis on pedaling efficiency. The LTS was born to make the bike fun to ride, therefore, it is not an XC bike where what only matters going uphill. In any case, to make the pedaling behavior as neutral as possible, pedal kickback has been reduced to a minimum, with a low placed pivot that is optimized for Eagle 1 × 12 transmissions, with 32-34T crowns. This is a 4-bar suspension scheme, obviously interpreted personally by GT. To those who comment “yes, but it’s the same as …” Let’s say right away that aesthetics is one thing, but from a technical point of view two bicycles, even if they have ballpark suspension patterns of the same type, can have very different behaviors, so every bike must be analyzed independently based on its characteristics,Īt the compression curve level, the new LTS has a more progressive curve and a high initial sensitivity on small impacts. It is compatible with both modern coil spring and air shock absorbers. The acronym LTS stands for Linkage Tuned Suspension and identifies the new suspension scheme that GT will use on the Sensor and the Force, but not solely those bikes (in the future we will see further changes on other models). There were those who liked it (personally, I found it very fun to ride, but it has a problem: it is very much affected by braking input. As long as you let the bike go a bit, the rear end eats everything, but when the braking got heavy, the suspension no longer worked as it should. The more brakes, the more it breaks down, thus requiring you to brake even more. A vicious cycle. In reality, the secret to remedy this situation is to let off the rear brake to make the bike more stable, but this requires a certain malice that the average rider hardly finds in times of difficulty. Executed in a rather daring way, a floating bottom bracket allowed a very high main pivot, first with the I-Drive then with the AOS, this general layout has been the workhorse of GT. Now it is no longer. The change is quite drastic, because the I-Drive has been the hallmark of GT for many, many years. The new Sensors and Force represent an important turning point for the American brand that completely abandons their most recent interpretations, namely the AOS (Angle Optimized Geometry) and the I-Drive, which they have finally forgone for a 4-bar style suspension scheme ![]()
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