Giant XTC Advanced SL 27.5 Frame Comp/Blue
Superlight and ultra efficient on the trail. Designed to help Giant Pro XC racers aim for World Cup podiums.
At the core of this premium-level XC bike is a featherweight composite frameset designed to handle the specific geometry demands of 27.5-inch wheels. An elite mix of weight, comfort and performance handling are built into each frame, offering the advanced off-roader the opportunity to pilot the highest performing hardtail Giant has ever produced.
>Advanced SL-grade frameset
>Quick handling, 27.5-inch wheel, optimized geometry for lightning-fast XC riding characteristics
>Integrated seatpost clamp mechanism
>Integrated rear disc tab
Ramstorlekar XS, S, M, L, XL
Ram Advanced SL-Grade Composite
Stötdämpare bak N/A
Extra Integrated seatpost clamp, Giant OverDrive headset (1 1/8" - 1 1/2"), Convertible dropouts for 135x5 and 142x12 included
Vikt The most accurate way to determine any bike’s weight is to have your local dealer weigh it for you. Many brands strive to list the lowest possible weight, but in reality weight can vary based on size, finish, hardware and accessories. All Giant bikes are designed for best-in-class weight and ride quality.
Frame size XS (37) S (39) M (44) L (49) XL (52)
Head tube angle (°) 69.5 69.5 69.5 69.5 69.5
Seat tube angle (°) 73.5 73.5 73.0 73.0 73.0
Top tube length (cm) 55.5 57.5 59.5 61.5 64.0
Reach (cm) N/A N/A N/A N/A N/A
Head tube length (cm) 9.5 9.5 10.0 11.0 12.0
Stack (cm) N/A N/A N/A N/A N/A
Chain stay length (cm) 43.0 43.0 43.0 43.0 43.0
Wheelbase (cm) 105.3 107.3 108.8 110.9 113.4
Standover height (cm) 77.6 77.9 79.4 81.7 83.2
Giant 27.5 wheel technology
Superior performance without compromise. These are the reasons to ride Giant 27.5:
Significantly lower bike and rotational wheel weight helps you climb faster with less effort.
Overall bike weight
Compare the weights of identically equipped bikes with different wheel sizes and you'll see substantial weight differences. As expected, the 26-inch-wheel bike is somewhat lighter than the 27.5, and substantially lighter than the 29 (up to two pounds of overall bike weight savings from 29 to 27.5). Every gram saved helps you ride faster.
The overall weight of a 27.5 wheel set (wheel, tire and inner tube) is only 5% greater than that of an identically built 26-inch wheel set. Compare this to the 12% increase of a 29-inch wheel set and you can see how a seemingly small increase in diameter results in substantial weight gain—and poorer performance when climbing or accelerating.
Lighter wheels/tires result in a quicker acceleration and lighter overall bike weight - a win-win combination.
Snappier acceleration and a reduced angle of attack for a smoother, more agile ride.
Increased wheel diameter decreases the angle of attack (the angle in which a round object intersects a square object). This is a good thing. A 29-inch wheel rolls over a 6-centimeter square-edge obstacle 14% more efficiently than a 26-inch wheel does. In comparison, a 27.5-inch wheel rolls over the same obstacle 9.8% more efficiently than a 26-inch wheel does. Another way to analyze angle of attack is the degree of impact—where 26-inch equals X degree, 27.5 equals X-4 degrees and 29 equals X-6 degrees. Again, a shallower angle is better—so 29-inch takes the win, with 27.5 exhibiting nearly the same performance but without the weight penalty.
Arguably the most important benefit of 27.5 over 29 is quicker acceleration. This is the "snap" that a rider feels when they push hard on the pedals. It is affected not just by overall static weight but also where the weight is distributed throughout the wheel. The farther the weight is from the center of the hub, the slower the acceleration. So a similarly constructed 1000-gram 29-inch wheel is slower to accelerate than a 1000-gram 26-inch wheel—because the larger diameter rim and longer spokes place weight farther from the hub. The key to snappy acceleration is minimizing the weight of the outermost components (rim, nipples, spokes, tire, tube). As you can see, a 27.5-inch wheel is only 1.5% slower to accelerate than a similarly constructed 26-inch wheel, but a 29-inch wheel is 3.6% slower than a similarly constructed 26-inch wheel.
A larger tire contact patch, increased stiffness, and optimized frame geometry improve traction, braking and handling.
The larger the diameter of a wheel, the greater the contact patch of the tire. A larger contact patch results in better traction, which leads to improved acceleration, deceleration and cornering. As you can see, a 27.5-inch wheel has a similar contact patch to the 29.
Lateral (side-to-side) frame stiffness can be affected by wheel size. To accommodate larger wheels, frame dimensions must be elongated. Therefore, a size medium 29-inch wheel frame has more lateral flex (bottom bracket and headtube) than a size medium 27.5 or 26-inch wheel frameset. Additional flex compromises handling under heavy pedaling or sharp cornering.
The larger the wheel, the more difficult it is to optimize geometry, especially on smaller frames. As the frame size decreases, headtube heights become higher (in relation to saddle height). On 26 or 27.5-inch frames, it's less of a problem, but geometry limitations can affect smaller 29-inch-wheel frames.
Unrivaled Composite technology
With more than 25 years of experience in carbon fiber engineering, plus a long history of rigorous development and testing with professional athletes, Giant is the industry leader in composite bicycle technology. To meet the needs of high-performance riders, Giant offers two grades: Advanced SL and Advanced Composite. Both feature unique materials, resin formulas and construction techniques.
Giant Advanced SL Composite technology
Giant's Professional-grade raw carbon material is woven in our own composite factory to create the most cutting-edge frames available today. These frames feature the most advanced engineering and construction methods:
>Professional-grade grade raw carbon with the highest stiffness-to-weight ratio available today.
>Professional-grade formula with Carbon Nanotube Technology (CNT), a microscopic polymer added to Giant's custom blended resin*. Like miniature buttresses, CNT strengthens the layers of composite. Frames featuring CNT are 14 percent more impact-resistant than those without it.
>Fusion process involves hand weaving the toptube and seattube together, then re-molding the area under heat and high pressure to unify the junction, resulting in a lighter, stronger frame than those with traditional molding.
>Continuos fiber technology manufacturing process allows Giant to construct the front triangle of Advanced SL bicycles* with larger, and therefore fewer, sections of composite material. With fewer pieces and junctions, the frames are up to 100 grams lighter and significantly stronger.
*Found on selected framesets