The Propel Disc range also introduces new purpose-built Giant components including an aero handlebar-and-stem unitwith internal cable routing, and aero WheelSystems optimized with different rim depths front and rear to reduce drag without sacrificing control or power transmission.
The goal with the new Propel Disc range was to create a race-winning aero road bike with zero compromises in weight, stiffness and overall race handling. Superior aerodynamic performance was a critical factor, but Giant pro racers including Tour de France stage winner Michael Matthews—who tested and raced pre-production versions of the bike earlier this year—demanded that it also deliver measurable gains in efficiency and control.
It took three years, radical experimentation with tube shapes, hundreds of iterations in Computational Fluid Dynamics, and innovative wind-tunnel testing with a dynamic mannequin, but the final results speak for themselves. The flagship model of the range, the Propel Advanced SL Disc , has the highest stiffness-to-weight ratio of any bike in its class, and wind-tunnel tests reveal a lower drag coefficient at a wider range of yaw angles than its non-disc-brake predecessor.
Matthews raced on pre-production versions of the Propel Advanced SL Disc earlier this year, including at the Tour de France. Following a rainy Stage 2 at the Tour, he said: “With all the new aerodynamics, this bike is super fast. When you need to accelerate, it really gives you that kick that you need. And even in the rain, with the disc brakes it’s perfect.”
The core concept behind the new Propel Disc range is Giant’s AeroSystem Shaping Technology. Viewing the bike as a complete system, rather than an assembly of a frame and components, engineers analyzed countless combinations of airfoils, tube junctions, wheels and components through CFD and wind-tunnel testing.
One of the key breakthroughs is a new truncated ellipse airfoil shape—a design that lowers drag at a wider range of wind angles than traditional “teardrop” frame tubing. Engineers also found that, with proper integration, a disc-brake design can actually improve aero performance compared to rim-brake configurations.
With its new integrated disc brakes, the Propel Disc range delivers superior braking power and greater modulation in wet or dry conditions. This was a critical performance demand from Giant pro racers. The frame is engineered with flat disc-brake mounts, along with front and rear thru-axle configurations for added stiffness and steering precision. Aerodynamic testing also reveals that the bike’s disc-brake integration reduces overall drag compared to traditional rim brakes. Oncoming air flows smoothly through a more open fork crown area, and the asymmetric fork design helps push air around the front disc-brake caliper more efficiently.
Another big demand from Team Sunweb pros was efficiency, as measured by stiffness-to-weight ratio. The flagship Propel Advanced SL Disc model frameset is lighter than that of key competitor bikes including the Specialized Venge Disc and Trek Madone. And tests show that it is also significantly stiffer than those competitors. The combination of lower weight and higher stiffness means that the new Propel Advanced SL Disc is more efficient on the road.
Beyond the chassis, the Propel Disc range features several new component innovations including an integrated Giant WheelSystem. The rear wheel, less affected by crosswinds, has a 65mm deep rear rim for uncompromising aero performance and power transmission. The front has a shallower 42mm rim for added control in crosswinds. This further boosts the bike’s aerodynamic performance by lessening the effect of crosswinds on the front wheel while also reducing overall drag.
The result is a bike that not only accelerates and slices through wind faster, but also corners with greater precision and handles better in all types of racing situations.
Here’s a look at the three series in the all-new Propel Disc range:
Propel Advanced SL Disc : The flagship model of the new Propel Disc range is engineered with Giant’s highest-grade Advanced SL composite material. Already tested and proven at the highest levels of professional racing by Team Sunweb sprinting specialists, it has the highest stiffness-to-weight ratio of any bike in its class. Every model in this series includes the Contact SLR Aero handlebar-and-stem unit with a wind-tunnel shaped airfoil design and internal cable routing for optimal aerodynamics. It also features new Giant SLR Aero WheelSystem with a 65mm rear rim depth and 42mm front rim for the perfect balance of aero speed and control in crosswinds. As part of a complete Tubeless System, these wheels are matched with Giant’s new Gavia tires.
Propel Advanced Pro Disc : Extensive CFD analysis and dynamic wind-tunnel testing were used to optimize every frame tube and angle in a process called AeroSystem Shaping technology. The frame is handcrafted using Advanced-grade composite material to produce a bike that’s lightweight and stiff, with a sharp, responsive ride quality. Disc brakes are integrated with the frame using flat-mount calipers, thru-axles and an asymmetric fork to maximize aerodynamic performance. This series features the Giant SLR 1 Aero WheelSystem with a 65mm rear rim depth and 42mm front rim for the perfect balance of aero speed and control in crosswinds. These Tubeless Ready wheels are integrated with Giant’s new Gavia tires to deliver seamless Tubeless System performance. This series also includes the Contact SLR/SL Aero bar and stem designed to reduce overall drag.
Propel Advanced Disc : Engineered with AeroSystem Shaping technology and Advanced-grade composite, this series delivers proven aero performance and one of the lightest frames in its category. New integrated disc brake technology includes flat-mount calipers and thru-axles for wheel stiffness and streamlined performance. This series features the Giant SLR 1 Aero WheelSystem with a 65mm rear rim depth and 42mm front rim for the perfect balance of aero speed and control in crosswinds. As part of Giant’s Tubeless System, the wheels are integrated with new Gavia tubeless tires for added rolling efficiency and a reduced risk of flats.
Giant Bicycles has introduced an all-new range of Reign enduro bikes featuring updated Maestro suspension technology and refined frame geometry. Aimed at competitive enduro racers, big-mountain adventurers, and anyone who loves to tackle aggressive trails, the new Reign comes to market with pro off-road performance in its DNA.
Engineered, designed and developed with valuable input from Giant Factory Off-Road Team riders, the new Reign incorporates several new technologies and frame features that have been put to the test on the most demanding trails and enduro races around the world. Josh Carlson, who scored a top-10 ranking in last year’s Enduro World Series, rode multiple prototype versions, testing the Reign’s improved suspension capabilities at race events and on his local trails in Vancouver, British Columbia.
The updated Maestro rear suspension features 160mm of smooth travel and some key improvements to shock performance and the overall handling of the bike.
A new trunnion mount allows for a longer shock stroke and a lower leverage ratio, which improves small-bump compliance and pedaling efficiency. The trunnion mount also allows for more insertion depth for longer dropper posts. And a new Advanced Forged Composite upper rocker arm increases frame stiffness, adds strength and reduces overall weight.
Every model in the new Reign range features new frame geometry including an aggressive 65-degree headtube angle and 73-degree seattube angle, engineered for 160mm of suspension travel front and rear. Developed and refined over time, the new geometry boosts overall control without sacrificing agility or climbing efficiency. And it’s all optimized for 27.5 wheels, which strike the perfect balance of lightweight agility, acceleration and control that’s needed to tackle aggressive terrain.
The 2018 Reign range includes two series. The Reign Advanced series is built on a lightweight, super-stiff Advanced-grade composite mainframe with an ALUXX SL aluminum rear swingarm. The Reign series features a full ALUXX SL aluminum frame. This series also includes a Reign SX model with an added 10 millimeters of front suspension travel and a special build kit that places more emphasis on technical all-mountain descents.
All the new Reign models are engineered and handcrafted by Giant, the only major bicycle brand that controls the entire frame-making process every step of the way. In addition, all models in the 2018 Reign range are engineered with Boost hub spacing for stiffer wheel performance, added tire clearance, and improved handling on the trail.
For flat-out speed and confidence on rough and rowdy enduro terrain, this is the fastest, most capable range of Reign bikes yet.
For more information, including a video and all the technical details on the entire new Reign range, click here.
Giant has introduced a new addition to its legendary collection of Anthem cross-country bikes, the all-new Anthem 29 range . Designed for competitive XC riders and racers, and featuring all-new 29er-specific geometry with key updates to its Maestro Suspension system, the Anthem 29 range consists of three different series ranging from a superlight full-composite frame race bike to a new ALUXX SL aluminum frame series.
Engineered, designed and developed with valuable input from Giant pro riders, the new Anthem 29 range is aimed at providing XC riders with the ultimate in speed and efficiency on technical terrain. The flagship Anthem Advanced Pro 29 series features a full-composite mainframe and rear triangle, and is the lightest 29er full-suspension frame ever produced by Giant. Each of the new models in the 2018 Anthem 29 range is engineered with 90mm of rear suspension travel and 100mm up front.
Every model in the new Anthem 29 range has a 69-degree headtube angle and 73.5-degree seattube angle. The updated Maestro Suspension system includes a new trunnion mount shock,which produces a lower shock leverage ratio for improved pedaling and braking efficiency. The rear suspension is further bolstered by its new Advanced Forged Composite upper rocker arm, which is lighter, stiffer and stronger than the aluminum version.
Models in the Anthem 29 range are engineered with Boost hub spacing for stiffer wheel performance, added tire clearance, and improved handling on the trail. And they all feature Giant Tubeless System technology, which means every bike is delivered with Giant WheelSystems and tubeless ready tires, making it easier than ever to enjoy the benefits of added traction, smoother trail control, and a reduced risk of flat tires.
Giant Factory Off-Road Team rider Carl Decker has been racing the Anthem platform since it was first introduced in 2005. He has experienced the evolution of a bike that started out as a World Cup XC weapon with 26-inch wheels and sharp-handling race geometry. The first 29er version of the Anthem debuted in 2010, and later a 27.5 version—aimed at more aggressive XC/trail riding with added suspension and slacker geometry—was introduced in 2014.
This all-new Anthem 29 range marks a strong commitment to the bike’s original DNA: uncompromising XC speed, efficiency and control.