Designed by riders for riders so you can adventure more, ride more, experience more.

Freedom to Travel

How to you feel about the idea of travelling twice as far on your bike for the same effort? Or how about a weekend away without the need for a car? Long-distance commuting without breaking a sweat? All of these (and more) are becoming possible with the advent of the e-bike.

The E-Adventure 1.0 was born to help you achieve this. We've been listening to devoted riders like you, and thinking on how best make the most of this whole new way of riding. Having e-assist on a bike will enable all of us to explore more of the paths-less-travelled and make it easier for people to choose bike over car more often, which can only be a great thing.

New For 2021

Always wanting to improve the Cairn team took the award winning E-Adventure back to the drawing board to see how it could be improved further.

Bigger changes come in the form of the gravel specific GRX groupset from Shimano, braking from the hoods has never been so comfortable as well as confidence inspiring.

Increasing stand over on the frames has done a huge amount for off-road control and manoeuvrability, it also has opened up our bikes to smaller riders.

E-Adventure 1.0 700c 2021

The 700c version comes equipped with the fast and lightweight Hunt X Cairn E-Gravel Disc wheels coupled with Vittoria’s awesome Terreno Dry tyre in 700x38c. The perfect combo for fast paced road and trail exploring. Ritchey components supply the cockpit with a carbon seat post to increase the comfort on rougher trails or to take away road buzz, it’s all finished off with Fabric’s bar tape and saddle. Equipped with mounts for both mudguards and racks, it makes it’s the bike that can do it all.

The frame and fork also has any 3 anything mounts, this opens up huge cargo storage solutions including the Cairn Range Extension pack, coupled with another Fazua battery (only 1.3kg) this gives you even further range to explore more.

Award Winning Design

The E-Adventure V1 took the UK cycling press by storm winning such accolades as the Cycling Weekly Editors Choice award, but always wanting to move forward, the Cairn team took the E-Adventure back to the drawing board to see how it could be improved further.

See Full Details

Being devoted riders ourselves and listening to our existing customers allowed us to change simple things like cable guide positioning to clean up the lines as well as re-positioning the Fazua remote for easier control. Bigger changes come in the form of the gravel specific GRX groupset from Shimano, braking from the hoods has never been so comfortable as well as confidence inspiring. t

Cairn have teamed up again with HUNT to bring a specific wheel fit for the rigours that this bike was designed for.

The HUNT X Cairn E-Gravel Disc wheels have been developed specifically for the Cairn E-Adventure and feature the same steel axle and increased pawl contact area for a longer lasting hub. Slightly wider rim than that on the V1 bike gives better tyre profile and allows lower pressures so increases grip and comfort.

Frame Improvements

Small changes can make a big impact on a riders experience, the V1 was a solid start but things can always be improved.

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New internal cable routing gives cleaner lines, options for dropper post as well as lighting systems connected to the Fazua system, all kept clean and tidy.

Lower stand over gives greater control, more room to manoeuvre as well as allowing smaller riders to fit on our bikes

Bridgeless seatstays give more compliance adding the comfort and control of the bike, but using our single sided plate mudguards can be mounted easily if you want.

The Adventure 1.0 700c 2021comes equipped with the renowned class-beating FAZUA motor. The drive system has a two-sided torque measurement: meaning the more power you bring to the crank, the more support you get back. With an average range of 75 km (46 miles) with the battery at the medium level of support, you can reach up to 144 km (90 miles) on Breeze mode.

New for this version is the re-positioning of the remote, allowing more for more control and ease of use whilst on the move.

Fast, sprightly and confidence to push hard in the turns – this is what a good tyre should feel like!

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Vittoria have the know how, they are one of the largest bicycle tyre manufactures in the world and the design and development that gores into the tyres is astonishing. The Terreno Dry tyres used on this bike feature 3 compounds and Graphene to deliver ultimate performance in a straight line and corners alike.

Finishing kit in today’s market is an overlooked part of most bikes. Unless its performance is noticeably better, or it has a very specific function to play most don’t notice the difference.

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Enter Tom Ritchey, from his pioneering days on the very first mountain bike trails to today, Tom does not settle for the norm. Everything Ritchey does has a unique feel and finish that sets it apart and nothing gets produced without approval from the man himself. The Ritchey Butano bar with its 118mm drop, 12 degree flare and 73mm reach will look pretty standard to most, Ritchey however adds a 4 degree back sweep and a much wider taper for extra comfort and compatibility with accessories and handlebar bags. Details like these make for a great finish to our bike.

Gravel bikes need a gravel specific groupset to give great shifting under power as well as powerful braking to keep you in control.

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The Shimano GRX groupset is the only gravel specific groupset on the market, the gear shifts are crisp even when crunching through gears under load on climbs. The brakes are also hugely powerful with a gravel specific lever shape to give better braking from the hoods or the drops.

700c Full Specification

Frame

6061-T6 alloy with Top Tube integrated Fazua touch remote

Fork

Full Carbon with Anything mounts of both legs

Wheels

HUNT 4 Season Gravel X-Wide Rim, Hunt E-Gravel Hub, Pillar Triple Butted Spokes

Tyres

Vittoria Terreno Dry 700 x 38c

Handlebar

Ritchey Butano Comp S - 42cm, M/L - 44cm, XL - 46cm

Stem

Ritchey 4-Axis 44 7 degree. S - 70mm, M - 80mm, L - 90mm, XL - 100mm

Bartape

Fabric Knurl black

Crankset

Praxis Fazua Alloy w/42t Spider, S - 165mm, M/L - 170mm, XL - 172.5mm

Cassette

Shimano CS-M7000-11 speed 11-42t

Chain

KMC e11 Sport w/EPT coating

Shifters

Shimano GRX ST-RX600-R & L for Single ring

Brake Calipers

Shimano GRX BR-RX400

Rear Mech

Shimano GRX RD-RX812

Rotors

Shimano SM-RT64 160mm

Saddle

Fabric Scoop Elite Shallow

Seat Post

Cairn Carbon Seat post 27.2mm 350mm

Thru Axles

Cairn Alloy Thru Axle w/Removable Bottle Opener Handle

Other

Removeable rear mudguard bridge

Weight

15.1kg / 33.3lbs (w/ motor & battery, size Large)

Speed Limitations

UK/EU/ROW – All Cairn Bicycles sold in the UK/EU/ROW will be set to the maximum pedal-assisted speed limit of 15.5mph or 25kph.

US/NA – All Cairn Bicycles sold in North America will be set up per Class 1 status, allowing the bike to assist to 20mph or 32kph only when the rider is pedalling.

The lightest and most compact drive system in the industry!

For the E-Adventure 700c 2021 we chose to partner with the amazing team at Fazua with their equally amazing Evation drive system. Its lightweight, integrated and natural pedal feel was exactly what we were looking for to complement our bikes. At only 4.6kg for the full system its helps to create a really lightweight ebike, furthermore the system has no mechanical resistance if not in use, so if the worst happens and you run out of battery it wont feel like riding a heavy bike through treacle like some other system. The battery its self though is just over 1kg and with the Cairn keg and cage you can easily carry another battery to further your exploration.

Cairn have also used the awesome new Black Pepper update (see below for more info) to create a Cairn E-Adventure tune, we believe these 3 modes best suit the terrain that you will encounter and will get the most from your bike and ride, its easy to switch back to the standard Fazua tune with a click of a button on the app.

You can now also connect your 3^rd party computers to the Evation drive, giving you loads more info, notably dual side power output of you the rider as well as the system – who doesn’t like seeing your watts.

More info on the Fazua Evation drive - https://fazua.com/en/drive-system/evation/

Three Different Riding Modes

Choose from three levels of assistance or pedal without any help, its that simple.

Breeze
Gentle, constant and 100 watts* like a strong tailwind even at low rider power.

River
Progressive and very sporty mode, for a smooth riding experience! The strength of the support precisely follows your own power. Give a lot - and get a lot from the motor (max. 210 watts*)

Rocket
Aggressive assistance that helps you to tackle the steepest (max. 250 watts*)

*default settings

Black Pepper Update

Fazua have updated the software of the Evation drive and labelled these changes as Black Pepper, so what do these changes bring to you?

Performance

The Evation drive system’s motor control was completely overhauled from the ground up. The result is a marked improvement in efficiency, making it possible to get even more performance from the compact unit.

Cadence range

One of the most clearly noticeable performance enhancements is the delivery of power over a broad cadence range. The Evation drive system now provides more efficient assistance at a constant motor output over a cadence range of 50–120 revolutions per minute.

Riding feel

From its inception, the Evation drive system has delivered a ride characterized by gentle, natural assistance. But now, riders can enjoy an even more authentic feel: In extensive biomechanical analyses, we used complex algorithms and methods to develop riding dynamics that perfectly adapt to the rider’s individual pedalling style—to guarantee the ideal level of assistance in every riding scenario.

How To Use The Drive System

700c

Spoilt for Choice - 700c or 650b?

650b

Gravel is such a broad term, and we realise this, one riders gravel ride is another’s mountain bike ride. This is why we came to conclusion we needed two version to give the choice to the rider; we have the fast paced 700c perfect for tarmac commutes with the ability to fly up the tow paths or farm trails for an adventure. If you like your gravel to be more chunky or thee destination for your ride is a MTB trail then the 650b version has you covered with big volume tyres supplying grip as well as comfort and the dropper post gives you the room to move when things point down.

We’ve broken the two bikes down to the points of difference below to help you choose which bike suits your adventure best.

Wheels

700c

HUNT 4 Season Gravel Disc X-Wide

The 6066-T6 aluminium rims with 25mm internal width makes the X-Wide wheels from HUNT highly durable and great for running 35C +tyres. They feature the new Hunt x Cairn E-Gravel hub with steel axle and larger surface engagement of the pawls to keep the wheels trouble free for longer. Find out more

650b

Mason x HUNT 650B Adventure Sport Disc

With a 25mm internal width, the Adventure Sport Disc wheels from HUNT are made for running wider tyres and the high spoke count makes them ideal for all kinds of terrain, even with a fully loaded bike. Find out more.

Tyres

700c

Vittoria Terreno Dry 38c

Fast-rolling and great on hard packed gravel with enough volume to take on the slightly rougher stuff. Featuring 3 different rubber compounds as well as utilising Graphene within the tyre this allows for a supper fast but confidence inspiring ride. Read all about the tyres here.

650b

Vittoria Mezcal 2.25" Front 2.1" Rear

The Vittoria Mezzcal 2.25” front and 2.1” rear tyres, the mix in sizing is something that the MTB fraternity have been doing for years and makes total sense, better grip, more comfort and control on the front and faster rolling on the rear.

Seat Post

700c

Kalloy Uno Rigid Carbon Seat Post

Lightweight carbon seat post to keeping overall weight down, carbon fibre is great for reducing vibrations from road buzz as well as having a bit of forgiving flex, letting you speed down those fire roads and gravel cycle paths in the saddle for longer.

650b

Tranz-X Dropper Post

The Tranz-X dropper with 80mm of drop allows the rider to not have compromise between efficient saddle height and comfort and control when riding off-road. Equipped with a remote control lever fitted under the left shifter, it enables you to have full control when you decide to go down that steep trail, then raise the saddle for the climbs with a flick of the remote.

700c Full Specification

Frame

6061-T6 alloy with Top Tube integrated Fazua touch remote

Fork

Full Carbon with Anything mounts of both legs

Wheels

HUNT 4 Seasnon Gravel X-Wide Rim, Hunt E-Gravel Hub, Pillar Triple Butted Spokes

Tyres

Vittoria Terreno Dry 700 x 38c

Handlebar

Ritchey Butano Comp S - 42cm, M/L - 44cm, XL - 46cm

Stem

Ritchey 4-Axis 44 7 degree. S - 70mm, M - 80mm, L - 90mm, XL - 100mm

Bartape

Fabric Knurl black

Crankset

Praxis Fazua Alloy w/42t Spider, S - 165mm, M/L - 170mm, XL - 172.5mm

Cassette

Shimano CS-M7000-11 speed 11-42t

Chain

KMC e11 Sport w/EPT coating

Shifters

Shimano GRX ST-RX600-R & L for Single ring

Brake Calipers

Shimano GRX BR-RX400

Rear Mech

Shimano GRX RD-RX812

Rotors

Shimano SM-RT64 160mm

Saddle

Fabric Scoop Elite Shallow

Seat Post

Cairn Carbon Seat post 27.2mm 350mm

Thru Axles

Cairn Alloy Thru Axle w/Removable Bottle Opener Handle

Other

Removeable rear mudguard bridge

Weight

15.1kg / 33.3lbs (w/ motor & battery, size Large)

650b Full Specification

Frame

6061-T6 alloy with Top Tube integrated Fazua touch remote

Fork

Full Carbon with Anything mounts of both legs

Wheels

HUNT 650B Adventure Sport Disc Rim, Hunt E-Gravel Hub, Pillar Triple Butted Spokes

Tyres

Vittoria Mezcal 27.5" x 2.25" Front & 27.5" x 2.1" rear

Handlebar

Cairn Adventure 20 Degree Flare, 65mm Reach, 105mm Drop S - 44cm, M - 46cm, L - 48cm, XL - 50cm

Stem

Cairn Adventure 6061-T6 - S - 60mm, M - 70mm, L - 80mm, XL - 90mm

Bartape

Cairn Anti Slip Gravel

Crankset

Praxis Fazua Alloy w/42t Spider, S - 165mm, M/L - 170mm, XL - 172.5mm

Cassette

Sunrace CSMS7 11 speed 11-42T

Chain

KMC X11

Shifters

Shimano GRX ST-RX600-R & L for Single ring

Brake Calipers

Shimano GRX BR-RX400

Rear Mech

Shimano GRX RD-RX812

Rotors

Shimano SM-RT30 160mm

Saddle

Cairn E-Adventure Saddle 143mm

Seat Post

Tranz-X 80mm drop w/Dropbar compatible lever

Thru Axles

Cairn Alloy Thru Axle w/Removable Bottle Opener Handle

Other

Removeable rear mudguard bridge

Weight

15.5kg / 34.1lbs (w/ motor & battery, size Large)

Sold out

Wheel Upgrades

You can add an extra set of Hunt Bike Wheels for 10% off, when purchased with your Cairn E-Adventure.

Sold out

FULL DETAILS

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FULL DETAILS

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FULL DETAILS

Bike Magazine & Website Expert's View

2020 Cycling Weekly Editor's Choice

"The E-Adventure 1.0 is an incredibly likeable bike to ride. I can be pretty on the fence when it comes to e-bikes, preferring like many for my legs to be the main performance delivery system for my riding. But after the first ride I came away with the same sense of rewarded effort as if I had ridden a ‘normal’ gravel bike – but one that I managed to ride farther than my legs felt like they had ridden."

2021 Bicycling E-Bike Award

"With its impressively steady handling manners, reasonably smooth ride, and a plethora of mounts, the Cairn is best for going places—particularly on roads and paths less traveled."

Cycling News Recommends 4.5/5 Review

"Cairn has taken the already somewhat niche electric gravel bike concept, sprinkled a little adventure dust on it and come up with one of the most versatile e-bikes around."

Cyclist Magazine Review

"A well considered e-gravel bike that now offers a choice of wheel configurations."

Bike Rumour 2019 Editor's Choice Award

"The most interesting e-bike I rode in 2019, was an e-gravel bike from Cairn. Propelled by a Fazua pedal-assist powertrain in the downtube, it strikes the perfect balance of giving just enough support to make the climbs a bit easier without every feeling like you are being pulled along. Comparing this back to back with a standard gravel bike on the same on & off-road loop, my heartrate was always just as high riding the Cairn, just my speed up every climb was noticeably faster. While most dropbar e-bike setups are literally a drag any time you get above their 25km/h limiter, the Fazua-powered Cairn was just as comfortable and natural feeling while pedaling at 20km/hr as it was at 40."

BikeRadar E-Adventure 1.0 Review

"As well as changes to its geometry, other key improvements include an update to the motor, changes to cable routing and controller position, and wheel options and compatibility for a dropper to cater to more adventurous riders."

Road.cc First Look

"We caught up with the chaps from The Rider Firm at the Eurobike show. They’re the people behind Hunt bike wheels, but they were excited to show us something else they’ve been working on: a new gravel e-bike."

Singletrack Charged Full Review

'They produce products that they want to use, and the Cairn is a product of that: it’s a bike to replace a car, go to work the long way round, and throw in a bit of weekend adventure.'

Find The Perfect Size

Finding the right size for your bike is crucial. Whilst every individual will have a slightly different bike fit preference, we strongly advise you to check the size chart below. Feedback from our customers states that it is a very good fit guide.

If you are still unsure, use the Smartfit size calculator to determine the best size for you. The calculations are based on scientific algorithms and data from 80,000 body measurements and more than a 100,000 bike model datasets.

Of course if you have any further questions please do get in touch with our friendly customer service consisting of real world riders like you.

Size Chart

BOOK A TEST RIDE

60-Day Ride Guarantee

We understand that buying a new e-bike is a big decision. To help you with that, we are so confident that you'll be happy with your Cairn E-bike, that we offer a full 60 days to ride it. If at any point during these 60 days you wish to return it for a full refund (or a product swap) please complete our Technical Support form, or call us on the phone number at the foot of our website. Unfortunately, we cannot offer a refund on any item that has suffered severe or crash damage within this period. However, we do offer a crash replacement discount scheme, so please contact us via email or phone and we will help.

Warranty

Cairn Cycles warranty is only valid if it is purchased through Cairn Cycles or an authorised dealer. The warranty is void if your Cairn bicycle was not purchased direct or with an un-authorised dealer, if you are not the original owner, or it has been subject to non-normal use. Non-normal use conditions mean the bike has been subjected to tricks, stunts, skate parks, pump tracks, ramps, bike parks, north shore style, trials riding, commercial or hire activities. All riding should be done within the intended use of the bicycle, see intended uses page for more details. Warranty does not apply to normal wear and tear, abuse, neglect, improper assembly or maintenance as well as crash damage or non-original parts.

Complete Bicycle

All bikes will have a 1-year complete bicycle warranty, as long as the bicycle was purchase from Cairn Cycles direct or an authorised dealer. This will cover any defective materials or workmanship for one year from the date of purchase. This will be subject to condition and use within the intended us guidelines.

Frame

All Cairn Cycles frames will be covered for a period of 5 years from the date of purchase by the original owner. Subject to normal and intended use, regular maintenance and inspection by Cairn Cycles.

Fork

All Cairn Cycles forks (for suspension fork warranty please see the manufactures website or manual) will be covered for a period of 5 years from the date of purchase to the original owner. Subject to normal and intended use, regular maintenance and inspection by Cairn Cycles.

Wheels

All Hunt Bike Wheels are provided with a 3-year warranty against material or workmanship defects. The warranty period runs from the purchase date. For more information visit our help pages

Components

The individual components of your bicycle will have a warranty period as well, which is specific to the manufacture or the component. These will be either outlined in the provided manuals at point of purchase or the details can be found on the manufacturers

Ways to Buy

We are pleased to offer several ways to purchase your new bike. Choose between full payment and depos

Deposit Option - Fully Refundable

If the bike is available to pre-order, we offer you the option to put down a small fully refundable deposit, which secures you the bike for the date which is shown.

If you choose to put down a deposit, we will contact you a few days before the bike arrive so you can pay the remaining amount and get your bike in time.

Product Availability

Please don't miss out, order now. Our bikes are in high demand due to their unique superior specifications. Please be aware that we are working hard to meet demand. Unfortunately sales often outstrip supply, so please order now to avoid

The availability status below the "Add To Cart" button gives an indication of when delivery can be expected.

LIMITED STOCK

If wheels are showing LIMITED STOCK, we have small numbers for immediate dispatch from our UK warehouse. Please allow for 3-4 working days in order for us to fully prepare your bike for it's new adventure.

PRE-ORDER

If the bike you would like is currently unavailable, you are able to pre-order for delivery at the advertised date. See below for deposit options available.

Designed by riders for riders so you can adventure more, ride more, experience more.

Freedom to Travel

New For 2021

E-Adventure 1.0 700c 2021

Award Winning Design

See Full Details

Read More

Read More

Frame Improvements

See Full Details

See Full Details

See Full Details

See Full Details

700c Full Specification

Speed Limitations

Read More

Three Different Riding Modes

Read More

Black Pepper Update

Read More

How To Use The Drive System

700c

Spoilt for Choice - 700c or 650b?

650b

Wheels

700c

650b

Tyres

700c

650b

Seat Post

700c

650b

700c Full Specification

650b Full Specification

Wheel Upgrades

Bike Magazine & Website Expert's View

2020 Cycling Weekly Editor's Choice

2021 Bicycling E-Bike Award

Cycling News Recommends 4.5/5 Review

Cyclist Magazine Review

Bike Rumour 2019 Editor's Choice Award

BikeRadar E-Adventure 1.0 Review

Road.cc First Look

Singletrack Charged Full Review

Find The Perfect Size

Size Chart

60-Day Ride Guarantee

60-Day Ride Guarantee

Warranty

Complete Bicycle

Frame

Fork

Wheels

Components

Ways to Buy

We are pleased to offer several ways to purchase your new bike. Choose between full payment and depos

Deposit Option - Fully Refundable

Product Availability

Singletrack Charged - Cairn E-Adventure 1.0

Discover Your Next Adventure