With elongated tube shapes and other wind-cheating
features, aero road bikes provide a small but handy speed boost.
Sleek shapes make for a distinctive look.
Recent aero road bikes have alleviated the harsh ride
that plagued some early models, thanks to improved use of materials.
Frame aerodynamics is still a marginal gain; if you're
wearing flappy clothes an aero bike is a waste of money.
In just a few years aero road bikes have gone from The Next
Big Thing to a mainstream bike option. The latest models have been tweaked
to be faster than ever, according to the manufacturers, and to alleviate
the harsh ride that characterised some early aero bikes.
Aero road bikes essentially draw aerodynamic features from time trial
bikes into a road frame, and balance the demands of weight and stiffness
into a package that, on paper, looks to be the ideal all-round choice.
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At any decent speed, most of your effort goes into overcoming air
resistance, so reducing a bike's drag means you'll go faster, or ride at
any given speed with a lower power output. Who doesn't like the sound of
that?
Most of your air resistance comes from your body rather than your bike.
Wearing non-flappy clothing will help, as will losing weight. But the 20%
or so of air resistance from your bike is enough for engineers and
designers to focus on making road frames and products more slippery
through the air. In the pro peloton aero road bikes have been quickly
adopted, where the margins of victory are very slim and there has been a
focus on gaining ever smaller performance gains over the years.
![Merida Reacto 2017 seatstays.jpg Merida Reacto 2017 seatstays.jpg]()
Weight, or the lack of it, used to be the main driving force of frame
development. Along with stiffness, it was a cornerstones of bike design.
These days most bikes are light, many well below the UCI’s 6.8kg weight
limit (which doesn’t affect non-racers anyway), and come with more
stiffness than is sometimes comfortable.
All that has made aerodynamics more important. Specialized has built its
own wind tunnel, for example, and most manufacturers are testing in other
facilities. Nevertheless, aero road bikes haven't converged on a perfect,
slippery shape. Different engineers prioritise different ways of improving
aerodynamics but there are shared design trends: skinny, aerofoil-shaped
tubes, integrated brakes, and internal cable routing.
Let's take a look at the latest aero offerings.
A new line for 2018 from Basque country bike builders Orbea, the Orca
Aero boasts lots of wind-cheating tweaks that Orbea says add up to a 27
watt advantage. Our tester David Arthur found the Orbea Orca Aero M20Team
to be "a fast and great handling aerodynamic road bike with a surprising
talent for smoothing out all but the roughest roads. But it is speed, not
comfort, that is at the top of the list of requirements for an aero road
bike, and that's an area where the Orca Aero feels very competent. It's
right up there with the Trek Madone, Cervelo S3 and Canyon Aeroad, as
super-quick aero race bikes.
"The handling is a highlight, and helps to set it apart from some aero
bikes that can be exceedingly quick but a little lacking when it comes to
the way they ride and translate your inputs into actions. The Orca Aero is
fun and engaging, putting a smile on your face when you're descending or
chasing a friend along an undulating ridge road."
You can customise the colour scheme and spec of your Orca Aero too, so if
you want to upgrade the wheels, or have yours in pink and orange, fill
your boots.
Read
our review of the e Orbea Orca Aero M20Team
Find an Orbea
dealer
![Bianchi Aria Potenza Disc.jpg Bianchi Aria Potenza Disc.jpg]()
Bianchi Aria Potenza Disc.jpg
The new Bianchi Aria Disc is an aero road bike that offers efficiency,
sharp handling and a responsive character, now with the additional
all-weather assurance of disc brakes – in this case from Campagnolo.
The Aria Disc responds keenly to increased effort. Our 59cm sample wasn't
especially light at 8.5kg (18.7lb), but it felt direct when you put in the
power, a meaty bottom bracket helping to keep everything solidly in place.
The Aria Disc feels as manoeuvrable as the rim brake version, which isn't
a surprise given that the geometry is virtually identical. Some bikes
designed for aerodynamics offer plenty of straight-line speed but they're
a little compromised when you want to flick around. The Aria Disc handles
sharply, which gives you options when it comes to darting about a group or
avoiding something in the road.
Read
our review of the Bianchi Aria Disc
Find a
Bianchi dealer
The new 3T Strada has blown us away. It's a truly stunning bike with
breathtaking speed, impressive smoothness and fine handling balance. If
this is the future, as some people have speculated, we're sold. Take our
money, 3T. This is one of the most exciting road bikes available right
now.
The Strada certainly won't be for everyone. And that's fine, there are
plenty of fantastic performance road bikes currently available if the 1x11
gearing, disc brakes and tight clearances frighten you. None are as
radical as the new 3T, though. What the Strada does with its unique design
is offer another choice. It achieves the same aim – of being stupendously
fast – but takes a different path to get there.
Read
our review of the 3T Strada
Find a 3T stockist
Colnago has joined the aerodynamic arms race with the Concept, a full
blooded aero race bike that is a serious step forward from the Italian
company's first aero road bike, the V1-r.
The Concept has all the capability to dice with the fastest in a race
situation. Its stiff frame, deep-section wheels and lightweight give it an
insatiable appetite for speed. It's quick in all circumstances: climbs,
descents, flat and undulating roads – the bike shines everywhere. This is
an exciting bike to ride fast, and like all good aero road bikes it
encourages you to ride flat-out.
That firm ride, and frame and fork stiffness ensure the Concept
accurately follows your inputs, whether through the handlebar or pedals.
It reacts positively whether you're blasting an uphill sprint finish or
bombing through a curving descent.
The Concept isn't just for racing. It provides adequate composure and
comfort, allowing you to tackle long distance rides at a few notches below
race pace and not be dealt a hammer-blow to the lower back the moment the
tyres encounter anything but a super-smooth surface. The front end of an
aero race bike can often be overwhelmingly harsh, but the special headset
and fork steerer tube that Colnago has developed mean the Concept is
smoother up front than would normally be expected on an aero road bike.
Read
our review of the Colnago Concept
Find a Colnago
dealer
![Merida Reacto - 17.jpg Merida Reacto - 17.jpg]()
Merida has updated its Reacto to be, it says, lighter, more comfortable
and more aerodynamically efficient than before. It has done this by
slimming down the tube shapes and introducing a lower seatstay connection
with the seat tube, among other things.
Merida – a Taiwanese brand although much of its engineering is undertaken
in Germany – says that the new Reacto is more aerodynamically efficient
than the previous version by about eight watts at 45km/h. That equates to
around 5%.
Comfort has been increased through redesigning the seatstays and giving
the S-Flex seatpost a slimmer cross section and a bigger ‘window’ – a
notch that’s cutaway to allow more downward movement.
For 2018, Merida is offering disc brake versions of the Reacto for the
first time.
Read
more on the updated Merida Reacto here.
Find a Merida dealer
![Boardman Elite Air 9.2 - full bike.jpg Boardman Elite Air 9.2 - full bike.jpg]()
Boardman Elite Air 9.2 - full bike.jpg
Boardman's Elite Air 9.2 (£2,150) is just the ticket if you're looking
for a fast bike with a good spec. It's a great package and the performance
is impressive.
Some aero bikes can be a handful, but thankfully the Air 9.2 is a neutral
ride most of the time. Considering the amount of side profile, it's really
not that much of a handful in the wind. Okay, our reviewer had a couple of
interesting moments getting hit by a 30mph sidewind on one ride, but it's
generally pretty predictable.
It's fast, it's firm but not uncomfortable, and it responds well under
power. There are a few minor niggles – the brakes aren't the best, and
some of the components are worth an upgrade to get the best out of the
frame – but if you're looking for a fast bike for racing, triathlon or
even time trialling then it's very much one to consider.
Read
our review of the Boardman Elite Air 9.2
Find
a Boardman dealer
Buying the Storck Aerfast Platinum is a massive outlay, but boy, oh boy
do you get one hell of a return on your investment. It's a sub-6.5kg race
weapon, with aerodynamics that work in the real world, and it offers
comfort levels to challenge most endurance bikes.
Taking plenty of things it has learnt from its astonishingly good
Aernario, Storck has pushed the design even further down the aerodynamics
route, and what it has created in the Aerfast is a bike that's not only
unbelievably fast, but light and stiff too.
If you're in the market for an aero bike, speed is going to be topping
your list of priorities, and that's where the Aerfast truly excels. At
lower speeds the Storck feels like any other bike to ride, any other
superlight bike that is, but as you ride faster it feels like a permanent
tailwind is nudging you along, a friendly hand on your back as you watch
the numbers climb on the Garmin – with little more effort required than
there was 5mph ago. It's a wonderful feeling, and one of which you never
tire.
Read
our review of the Storck Aerfast Platinum
Find a
Storck dealer
![Cervelo S3 Disc - riding 3.jpg Cervelo S3 Disc - riding 3.jpg]()
Cervelo S3 Disc - riding 3.jpg
Cervélo has redesigned the S3 Disc to smooth out any penalties that might
occur from adding disc brakes. The result is a frame that it claims is 9%
stiffer, a touch more aerodynamically efficient, and lighter by 40g
compared with the regular rim brake model.
There's a lot to like about the Cervélo S3 Disc. If you want pure speed
with the reassurance of hydraulic disc brakes, it's a very good option:
it's extremely fast and the handling is lively and direct – just what you
want from a race bike – but its composure on rough roads falls some way
short of its key rivals. If you're willing to overlook its lack of
comfort, it's an explosive bike.
Read
our review of the Cervelo S3 Disc Ultegra Di2
Find a Cervelo
dealer
![2018 Ridley Noah SL Ultegra Di2.jpg 2018 Ridley Noah SL Ultegra Di2.jpg]()
2018 Ridley Noah SL Ultegra Di2.jpg
Aero and discs? It's getting more common as bike makers figure out how to
mount disc callipers without adversely affecting aerodynamics.
Ridley calls its collection of speed-enhancing aerodynamic features FAST.
It includes the slotted F-Split fork with a gap running down the centre
and F-Surface Plus, a tube shape that combines an aerofoil profile with a
groove that helps keep the air flowing smoothly over the surface to reduce
drag.
As for the discs, Ridley believes they're simply a better way of
stopping.
Read
about Greg Henderson's Ridley Noah SL
Find a
Ridley dealer
![Pinarello Dogma F10 2017.jpeg Pinarello Dogma F10 2017.jpeg]()
Pinarello Dogma F10 2017.jpeg
Developed in collaboration with Team Sky, the Dogma F10 is the bike upon
which Chris Froome won the 2017 Tour de France. The F10 uses FlatBack tube
profiles – a Kamm tail sort of shape with a rounded leading edge and
chopped off tail, and Pinarello has shaped the down tube so that you can
mount a water bottle without ruining the aerodynamic performance. Up front
the fork is derived from the company’s Bolide time trial bike with
aerodynamically shaped legs and a crown that's integrated into a recessed
down tube.
Find a
Pinarello dealer
![2018 Canyon Aeroad CF SLX 9.0 LTD 2018 Canyon Aeroad CF SLX 9.0 LTD]()
2018 Canyon Aeroad CF SLX 9.0 LTD
The second-generation Aeroad CF SLX has been inspired by the work that
Canyon did on its futuristic Speedmax time trial bike, with razor sharp
aero tube profiles and an optional one-piece handlebar and stem. Much of
the company’s focus was on reducing the Aeroad's frontal surface area, so
along with the new cockpit there’s a narrower hour-glass shaped head tube
to help reduce drag. Other changes include a variant of the Trident tube
shape used on the Speedmax, and a seat tube that hugs the leading edge of
the rear wheel.
The Aeroad CF SLX is available in both rim brake and disc brake models.
Read
our review of the Canyon Aeroad CF SLX 7.0 Di2
Read
our review of the Canyon Aeroad CF SLX Disc 8.0 Di2
Check
out our complete guide to Canyon's road bikes
![2018 Specialized S-Works Venge Vias Disc eTap 2018 Specialized S-Works Venge Vias Disc eTap]()
2018 Specialized S-Works Venge Vias Disc eTap
If you're going to fly, you need to be able to rein in that speed. Disc
brakes give finer modulation of speed with less effort at the lever so as
you're whooping into Alpine hairpins you can brake later and waste less
valuable speed.
As well as its aero frame, the Venge Vias has an aero handlebar and stem.
The almost complete lack of external cables further reduces drag.
Read
our review of the Specialized Venge Vias Expert Disc
Read
about Mark Cavendish's Venge at the Tour de France
Find a
Specialized dealer
![2018 SCOTT FOIL PREMIUM DISC .jpg 2018 SCOTT FOIL PREMIUM DISC .jpg]()
2018 SCOTT FOIL PREMIUM DISC .jpg
The Foil arguably kicked off the whole aero road bike trend, bringing
aerodynamic design that was once the preserve of time trial bikes to
regular road bikes. For 2018, Scott has added disc brakes, arguing along
with other manufacturers that you can go faster if you can slow down
better. That's on top of the last series of updates to the Foil that saw
the down tube lowered and wrapped around the fork crown, and a smaller
rear triangle and internal seat clamp in the top tube.
Don't make the mistake of thinking this is an uncomfortable aero bike.
Mathew Hayman rode over a few little bumps on his way to winning
Paris-Roubaix in 2016.
Read
our coverage of the 2016 Scott Foil launch
Find a Scott
dealer
Once an all-round lightweight race bike, the Madone has had a complete
aerodynamic makeover. It features a version of the Isospeed decoupler
borrowed from the Domane to provide some comfort and it’s wrapped up in a
frame with Kamm tail shaped tubes. Like Specialized, Trek has also
developed its own brake callipers that are designed to integrate with the
fork and seatstays. The head tube features flaps that open and close to
accommodate the movement of the brake when the fork is turned.
For 2018, prices are down out of the upper stratosphere with a new model,
the Madone 9.0 (above) that's priced at £3,500.
Read
our coverage of the 2016 Trek Madone launch
Find a Trek dealer
![2018 Giant Propel Advanced SL 0 Disc.jpg 2018 Giant Propel Advanced SL 0 Disc.jpg]()
2018 Giant Propel Advanced SL 0 Disc.jpg
Giant has added disc brakes to the Propel Advanced lineup for 2018,
claiming that the flagship model, the Propel Advanced SL Disc, has the
highest stiffness-to-weight ratio of any bike in its class and a lower
drag coefficient at a wider range of yaw angles than the rim brake
version.
“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,” says Giant. “Engineers also found that, with
proper integration, a disc-brake design can actually improve aero
performance compared to rim-brake configurations.”
As well as a stunning paint job, the top of the range Propel Advanced SL
0 Disc has a full Shimano Dura-Ace Di2 groupset and Giant's own SLR 0 Aero
Disc wheels with a 42mm deep front rim and 65mm rear.
The Propel disc range starts at
£2,999 with the Propel Advanced Disc.
Read
our review of the Giant Propel Advanced Disc
Read
our review of the Giant Propel Advanced 1
Read
our coverage of the original Giant Propel launch
Find a Giant dealer
![lapierre aircode sl 4.jpg lapierre aircode sl 4.jpg]()
lapierre aircode sl 4.jpg
French brand Lapierre has given its Aircode a major update for 2018. The
frame profiles have been refined, and are now shaped using a combination
of NACA and Kamm tail profiles. The down tube, for example, transitions
from one to the other to keep drag low while increasing lateral stiffness
at the bottom bracket. Other changes include a revised geometry, shorter
chainstays and fork rake that has been reduced to bring it closer to the
Xelius SL. There's also a new aero seatpost, direct mount brakes and
'TrapDoor technology' whereby the Di2 battery is housed in the down tube
for better weight distribution.
Lapierre has integrated the fork crown into the down tube to bring the
front wheel closer to the frame. It’s also using a direct mount brake
calliper which allows the fork crown height to be lower than with a
standard brake.
Read
our review of the Lapierre Aircode SL 900 Ultimate
Read
our coverage of the launch of the Lapierre Aircode SL
Find a
Lapierre dealer
![Bianchi Oltre XR3 - riding 1.jpg Bianchi Oltre XR3 - riding 1.jpg]()
Bianchi Oltre XR3 - riding 1.jpg
Bianchi took the Oltre XR2 as its starting point for the XR3's design and
then altered many of the tubes and features, resulting in a very different
bike. The head tube is new, for example, the aero design fairly similar to
that of the XR4, and the seat tube is new too, although it is still cut
away around the leading edge of the rear wheel.
The Oltre XR3 features Bianchi's Countervail technology, Countervail
being "a patented viscoelastic carbon material with a unique fibre
architecture that cancels up to 80% of vibrations while increasing the
stiffness and strength of carbon frames and forks", according to Bianchi.
The Oltre XR3 is nimble and sharp handling, and it offers a ride that's
smooth by aero road bike standards.
Read
our Bianchi Oltre XR3 review
Read our Bianchi Oltre XR3 Disc review
Find a
Bianchi dealer
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