Words by csdur

on 01/08/2018 14:03:35


Value and performance from Giant's endurance all-rounder….Open-mouthed smile

Giant announced that it is launching an all-new range of Defy endurance road bikes. Designed to offer road riders a smoother, more compliant ride quality, especially over longer distances on challenging roads, the new Defy bikes introduce several key innovations including an expanded offering of Giant’s proprietary D-Fuse technology components.

The 2019 Defy range includes the Defy Advanced Pro and Defy Advanced series, both handcrafted with Advanced-grade composite framesets. Both also feature updated frame geometry to optimize performance with higher volume tires, along with other key innovations to deliver engineered compliance, total control and versatility for endurance road riders.

“The Defy has long been a favorite among endurance road riders as well as gear editors and testers around the world,” said Nixon Huang, Giant’s senior global road category manager. “So we were already starting from a strong position with this project. We focused on finding new ways to give it an even smoother, more refined ride quality to help minimize fatigue, but without compromising its efficiency and high-performance feel on the road.”

Over the past two years, Giant engineers experimented and tested various concepts to address those goals and ultimately achieved breakthrough results by expanding on existing D-Fuse technology. Initially presented in 2014 as a proprietary seatpost for cyclocross bikes, D-Fuse was created to absorb shocks and vibrations, giving cyclocross riders and racers more control on rough roads and dirt. The heart of its design is a distinctive tube shape with a round front and flattened rear section. Following its success on TCX cyclocross bikes, including multiple world championship titles, the D-Fuse seatpost design was adapted by the Defy range in 2015 to help minimize fatigue on long road rides.

Now, for the first time ever, Giant is bringing this D-Fuse technology to the front half of the bike in an all-new handlebar. The expanded role of D-Fuse, as a system, is to significantly improve compliance at key contact points while at the same time maintaining a high-performance ride quality.

The new composite Contact SLR D-Fuse and aluminum Contact SL D-Fuse handlebar models use similar D-shaped tubing as the seatposts. Tests show that the composite version has 10 percent more “pushing” or downward compliance and 30 percent more “pulling” or upward stiffness compared to the round-shaped Contact SLR composite handlebar. The Defy Advanced Pro model also features a new stem, the Contact SL Stealth, that improves aero performance and gives the bike a cleaner, more streamlined look.

“The result is that we now have a handlebar that is more comfortable over rough terrain, while also remaining stiff and efficient enough for hard climbing and out-of-the-saddle sprinting,” said Huang. “Plus, it works in unison with the D-Fuse seatpost to add compliance at two key contact points, the handlebars and the saddle, without the unwanted complexity or weight associated with pivots or inserts.”

Frame geometry on new Defy models has evolved slightly to allow higher volume tires up to 32c. The bottom bracket has been dropped 5mm to compensate for higher tire volume, giving riders the option to run larger tires for a smoother ride on rough roads or mixed terrain. All Defy models also feature disc-brake integration with flat mounts and thru-axles, along with Giant’s Tubeless System, which includes tubeless wheels and tires already set up out of the box.

Beyond the frameset and D-Fuse innovations, this year’s Defy range also marks the debut of Giant’s Power Pro system on the top-end model, the Defy Advanced Pro 0. This integrated, dual-sided power meter measures power output and delivers accurate data to help riders track, analyze and improve performance. With multi-axis left and right crank arm sensors, it pairs with the Giant NeosTrack GPS computer to display vital information including power (watts), pedal balance, force angle and cadence. The Power Pro is also compatible with other popular ANT+ head units.

Here’s a look at the two new series in the 2019 Defy range:

Defy Advanced Pro: This all-new, high-performance frameset is handcrafted with Giant’s Advanced composite frame material and a full-composite fork for endurance road riding. With the perfect blend of stiffness and compliance, it delivers a smooth, fast ride quality for long, hard rides. Its innovative technologies include a Giant D-Fuse SL composite seatpost, Contact SLR D-Fuse composite handlebar, and the new Contact SL Stealth stem for improved aero performance These cockpit components work as a system to add compliance and reduce road shocks and vibrations. The frame is also integrated for disc brakes, with flat mounts and 12mm front and rear thru-axles, plus added clearance for high-volume tires up to 32c. The oversized and tapered OverDrive 2 steerer tube boosts cornering precision, while the PowerCore bottom bracket delivers precise handling and best-in-class pedaling efficiency.

Defy Advanced: Engineered with Advanced-grade composite material, the Defy Advanced features tube shapes that are optimized to absorb road shocks and vibrations. The frameset is made with a specific carbon layup process for a compliant ride quality that preserves stiffness and pedaling efficiency. It features integrated disc brakes with flat mounts and 12mm thru-axles. The D-Fuse SL composite seatpost and Contact SL D-Fuse aluminum handlebar system help reduce road vibrations, and the full composite OverDrive steerer produces precision cornering capabilities. Frame and fork clearance has been increased, so riders can now run larger tires up to 32c.

For more information, including videos and technology details on all the new models, click here.

30 July 2018 – Article from Giant Bicycles -

All new Giant Defy launches, featuring D-Fuse handlebar and Giant’s new power meter included on the top model – ROAD CC Review – By Jack Sexty

The latest version of Giant’s hugely popular endurance road bike has wider tyre clearance, tubeless tyres off the peg and now has D-Fuse handlebars for extra compliance. The Defy Advanced Pro 0 also comes with Giant’s new Power Pro dual-sided power meter.

Full bike, Credit - Sterling Lorence Photo

Full bike, Credit - Sterling Lorence Photo

Giant have launched the 2019 version of their Defy endurance road bike, with the D-Fuse compliance technology first seen on their seatposts now featuring on the handlebars too. The top-of-the-range Defy Advanced Pro 0 also comes with Giant’s new Power Pro dual-sided power meter included, with the price point set to be game-changing. 

Guide to Giant's 2018 road bikes
15 of the best 2018 disc brake endurance bikes

The Defy is Giant’s most popular road bike, and while it’s best known for all-day comfort and relaxed geometry that appeals to beginners and experienced endurance cyclists alike, the new features reposition the Defy as a proper performance machine that will take you far and wide. Aesthetically a big change is the Contact SL Stealth stem that features on the Defy Advanced Pro models, which allows for a cleaner look up front and cable integration that can also be found on Giant’s Propel aero road bike.

Bars, Credit - Sterling Lorence Photo

While its this that might initially turn heads, the bigger story is Giant’s new D-Fuse handlebars to allow for extra compliance and rider comfort. Giant’s D-Fuse technology began on their carbon seatposts, allowing for a very small amount of travel to absorb shock and vibrations at the rear to give more control over rough roads. The D-Fuse seatposts were first specced on Defy bikes in 2015 and appear across the new range, and the handlebars are available in composite or aluminium versions. The small bit of flex gives you a claimed 10% of downward compliance when pushing on the bars, however Giant say it’s also 30% stiffer when pulling up on the bars compared to their rounded Contact SLR composite handlebars. In fact, Giant’s senior global road category manager Nixon Huang says that the new Defy was actually shown to have the same pedalling stiffness as the Propel during in-house testing.

Front, Credit - Sterling Lorence Photo

The frame geometry is largely unchanged, with the most notable update being an extra 5mm of bottom bracket drop to accommodate wider clearance. Elsewhere it’s almost identical to the previous Defy, with a 73.5 degree seat angle, 72.5 degree head angle and a 54.5cm top tube on a size medium frame adding up to a bike made for munching the miles.

All the new frames are disc brake only, optimised for the latest flat mount and 12mm thru-axle standards. It can take up to 32mm tyres, and off the peg all bikes in the range come with tubeless-ready wheels and Giant Gavia tubeless tyres.

The new Power Pro power meter

Crank, Credit - Sterling Lorence Photo

It’s perhaps surprising that Giant chose to launch their new power meter on a bike more associated with weekenders and commuters than competitive riders, but this again reiterates that the Defy is fully aimed at performance cycling, with all the add-ons you’d want to get the most out of your training; therefore a dual-sided crank-based power meter ain’t a bad place to start, and the Power Pro looks bang up to date with no compromises compared to current competitor products… “Power for all”, so say Giant.

It’s fully integrated with left and right crank arm sensors and pairs with any ANT+ GPS units, and Giant have developed their own proprietary algorithm that can affect strain gauge data. It compensates for weather variations and ‘noise’ from other nearby devices that could make readings inconsistent. Another neat feature is the accelerometer that detects cadence without the use of a magnet switch. The sensor collects multiple cadence data points throughout the pedal stroke, which means the Power Pro can also calculate pedalling angles, force position and help you evaluate pedalling efficiency.

You get 150 hours on a single charge from the rechargeable battery, and there’s an LED indicator on the unit that shows you the battery level. It also has a fully waterproof casing that has been impact tested to ensure durability. Giant’s RideLink app is used to update the firmware, and you can also calibrate it here too.

Initially the Power Pro will just be available on the new Defy, but Giant do plan to release it as an aftermarket product in the future.

The Defy range and pricing

The Defy will be available in six models, three Defy Advanced Pro and three Advanced options. The Advanced Pro 0 has a full Ultegra Di2 hydraulic groupset (there's no Dura-Ace option) with a mid-compact chainset, the Giant power meter, composite D-Fuse bars and seatpost, 28mm Giant Gavia tubeless tyres and Giant’s SLR 1 disc wheelset.

The Advanced Pro 1 loses the power meter and has mechanical Ultegra with compact chainrings, but the spec is the same as the top model elsewhere, while the Advanced Pro 2 has a full Shimano 105 groupset with all the higher end components except for an aluminium D-Fuse bar instead of the SLR composite version. All Advanced Pro bikes come with the Contact SL Stealth stem.

Defy Advanced 1

The Advanced 1 has the Giant P-R2 wheelset and Ultegra shifters and derailleurs, but instead has Giant’s own Conduct brake system developed with TRP, hydraulic with a cable-actuated cylinder. This spec was chosen by Giant in the UK to bring the Advanced 1 down to the £2,000 price point, which will make it one of the best value bikes out there with Ultegra components.

The final two in the range are the Advanced 2 and 3 that have mechanical disc brakes, with Shimano 105 and Tiagra groupsets respectively. The Advanced bikes all have the Connect stem, losing some of the super clean front end cable integration that the Contact SL Stealth steam provides.

D-Fuse Technology

UK pricing is set to be confirmed next week, but we have most of the US prices and if the conversions are like-for-like, the top end Defy Advanced Pro 0 at $5,300 could come in at close to the £4K price point. This would break new ground in pricing for off-the-shelf power-equipped bikes, with no other options from any brand including Giant coming close at the time of writing. Giant’s own Propel with a Dura-Ace power meter comes in at £7,200, and if you want a Specialized S-Works Tarmac SL6 with power that will set you back £8,500

2019……New Season bikes arriving soon to the number one bike shop in the North East…..INFINITY CYCLES DURHAM!

Infinity Cycles | Durham, now the number one North East bike shop and one of the largest independant stores in the UK, first opened its doors in July 2009. Since that day our mission statement has been simple - to offer cyclists an unbeatable range of premium brands and products combined with unrivalled customer service. The store is rider owned and operated by people who live and breathe bikes. Our diverse team are passionate about delivering the ultimate customer experience and are always on hand to share their knowledge and expertise, to help you make the most of the sport we love!.
Our large, modern Durham Store displays well over 300 bikes from leading brands Cube, Giant and Whyte, covering all disciplines, with something for every rider. We are also home to  the UK's first and only Cube Bikes brand store, stocking the largest range of Cube Electric Bikes. We also have a dedicated womens area stocking an extensive range of bikes from Liv and Cube, as well as a large range of female specific clothing and accessories.
On site we also have a large, dedicated, well equipped, bike servicing, repair and maintenance centre. Our Tech Centre which is widely regarded as the North East's best cycle repair workshop is open 6 days a week and is here to keep the regions cyclists rolling trouble free. The Tech Team are all Cytech trained and qualified and are more than happy to help in your hour of need.
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