The complete guide to gravel bikes

Category: Bikes

‘Why buy a gravel bike?’ ranks among the internet’s most asked questions, just one place below ‘what do plain clothes policemen wear on their day off?’.

The reason is simple: gravel bikes, also known as adventure bikes or occasionally mixed terrain cycles, fill in the gap between road bikes and mountain bikes.

Because of their highly-specialist designs, mountain bikes are just as useless on the road as road bikes are on the trail, so if you want a bike that can handle both terrains, well friends, you need a gravel bike.

The advantage of adventure bikes

Go anywhere. That’s the major advantage of the gravel or adventure bike. No need to hoist your MTB on the car roof until you get to the trail, while your road bike’s tarmacked limits are a thing of the past.

Take the road to the beach, then ride on the beach. Sail through the forest and ride up the fire road, then head home through the city.

Gravel bikes are versatile, resilient, and incredibly fun to ride. If you can see it, you can ride through it, and turn every journey into an adventure without limits.

Another big advantage of the adventure bike is the relative cost. Because they are relatively simple machines, foregoing the precision engineering of a full-sus enduro bike or the weight-saving materials of a carbon fibre road beast, adventure bikes are considerably cheaper than a high-spec road or trail thoroughbred.

This makes it an excellent second bike for regular riders, or as a versatile all-rounder for the leisure cyclist.

The anatomy of a gravel bike

Like the griffin of legend, gravel bikes are a hybrid of both road and mountain bike design. They combine MTB wheels, tyres, and frame clearance and forks with a robust climbing bike-style frame and drop handlebars.

As it’s not built for flat out sprinting, an adventure bike’s frameset is compact, with a more relaxed geometry than the standard road bike. Indeed, the frameset will be slacker still than a regular endurance or sportive bike, making them incredible accessible and easy to ride.

To cope with big climbs and relatively low speeds, mountain bike groupsets are usually employed to handle the grunt work, with their more rugged construction giving them the edge over road bike componentry. This includes disc brakes, which are almost universally fitted to adventure-style bikes.

Cyclo-X Frames Buying Guide

The Complete Groupsets Buying Guide

Where did the gravel bike come from?
While gravel bike and adventure bike are often used as interchangeable terms, the gravel bike is actually a subset of the adventure bike category.The adventure bike category includes three types of bike.Gravel bikes: Developed from the gravel racing scene popular in the Midwest United States, they feature a similar geometry to climbing bikes, making them fast yet comfortable, with a longer wheelbase for stability over rough terrain.Cyclocross bikes: These bikes are used for high-speed, shorter races through often muddy terrain. They feature a more aggressive riding position with steeper head and seat tubes, with higher bottom brackets for better ground clearance.Touring and Audax bikes: Touring and Audax bikes offer a more upright riding position to aid riding with racks and hefty bags over long distances. Strong build quality allows riders to carry plenty of weight, even over tough terrain.

What tyres for a gravel bike?

To cope with the mix of terrains, adventure road bikes are usually fitted with wide, semi-slick tyres, but depending on where you’re planning on spending most of your time, you might consider going for either more lugs or a slicker profile.

Frames and forks are generally generous in terms of clearance to fit even the most bloated tyres, while fixtures for mudguards will also commonly feature.

Will I need a different size when buying a gravel bike?

While the frame geometry might not be what you’re used to, especially if you’re a pure MTB or road bike rider, getting the right frame size shouldn’t be a hassle.

A detailed sizing chart is provided on each of the product pages on Chain Reaction Cycles.

All you need is a few simple measurements and you’ll be able to find the perfect frame size for you.

Hang on – what do I wear on a gravel bike? Baggies or bibs?

Given the growing popularity of the discipline, gravel-specific wear is just starting to emerge onto the market in small quantities.

A few brands are testing ‘explore’ wear, but at present it’s really up to the individual rider whether they don baggies or bibs, road or peaked helmets, jerseys or t-shirts.

Our advice is that anything other than a full-face helmet and you’re probably going to be alright. Wear whatever makes you feel comfortable and biased toward whichever terrain you’re going to see more of.

Wait – what about shoes?

Oh yeah… well, if clipping in, are you going SPD-SL or MTB style SPDs? Because you’re not looking for the slim wattage advantages provided by road cycling pedal systems, our advice is to go for SPDs when clipping in.

This will ensure you can get the foot down on an off-road switchback while still giving you some upward pulling power when out on the asphalt.

What that means is, you’re more likely to be pulling on the MTB shoes, which might change some of your decisions about attire elsewhere. Or it may not; that’s really up to you.

Pedals buying guide

Look, just wait a minute. Saddles, what about saddles?

Oh right, saddles. Well, again, we’re talking about a more comfortable riding position and a more versatile and less technical riding style. The logical decision is therefore a more comfortable saddle, such as an endurance saddle or an MTB style seat.

But again, there are no hard and fast rules. When riding for adventure, you’re only competing against yourself. There are no wattage output expectations, no lap times, no mileage requirements, no 100-mile barriers, no tricks, no drops, and no best lines.

There’s just you, a bike, and the planet.

Saddles buying guide

What’s with the flared bars?

With less focus on aerodynamics, gravel and adventure bikes can better accommodate the need for more control. Just like the wide bars of modern mountain bikes, wider drops give you more precision on technical descents. By increasing the distance the bar has to turn to make small adjustments, you have more room for error, which is great when navigating a rocky path. 

Check out these Service Course SL 70 XPLR bars by Zipp for more detail on flared bars and their advantages. 

Zipp innovation creates gravel bar with control and flare

Which gravel bike is right for me?

Will you be commuting, touring, or exploring? Will you be spending most of your time on the road or in the mud? Is it for short spins or all day epics? All these questions will influence your gravel bike choice. Check out some of the examples below to help you make your decision.

Vitus Substance CRX Adventure Road Bike

Vitus Substance VRX

Featuring a full carbon frame and fork and brandishing SRAM’s trusted Apex 1X11 drivetrain, this bike is well equipped for any adventure.

Full carbon frame and fork
Flared drop bars for off road control
Hi spec, with SRAM Apex 1X11 groupset

Ideal for: Tough adventure riding, climbing, and exploration. 

See the full Vitus Substance selection at Chain Reaction Cycles

Vitus Substance Adventure Road Bike (Sora)

Vitus Substance Adventure Road Bike


Featuring the fine-tuned geometry dynamics of the CRX model, the CrMo alloy frame and carbon fork ensure this Shimano Sora-equipped bike has just as much finesse as the higher spec model but at a more competitive price.

Carbon fork
Flared drop bars for off road control
Shimano Sora groupset

Ideal for: Bike packing, leisure riding, and exploration. 

See the full Vitus Substance selection at Chain Reaction Cycles

Orro TERRA GRAVEL 105 Racing Bike

Orro TERRA GRAVEL 105 Racing Bike

Kitted out with lightweight and strong carbon forks for awesome shock absorption and terrain smoothing, a consistent and efficient Shimano 105 drivetrain and 50-34 chainset offers easy gearing and shifting when given the opportunity to soar.

Shimano 105 groupset
Prologo Kappa RS saddle
Triple Butted Aluminium Frame

Ideal for: Punishing riding on the trails and fire roads.

NS Bikes RAG+ Gravel Bike

NS Bikes RAG+ Gravel Bike

This bike is equipped with a range of modern technology, featuring a lightweight and extremely tough alloy frame, a full carbon fibre fork, front and rear thru-axles, an 11-Speed drivetrain, disc brakes, and the ability to run tubeless tyres up to mountain bike sizes.

SRAM Apex 11-Speed groupset
Huge tyre clearance capable of running 27.5″ MTB wheels
SRAM Apex hydraulic disc brakes

Ideal for: Hilly terrain and muddy conditions

Octane One Gridd Adventure Road Bike

Octane One Gridd Adventure Road Bike

The Gridd offers mounting points for a rear rack, mudguard mounts and clearance for up to 700x43c tyres. This means you can adapt it to be the ultimate go-anywhere adventure or touring bike. It’s 1X SRAM Apex groupset, meanwhile, provides reliable performance for those epic rides.

SRAM Apex 1 groupset
Custom formed and butted 6061 aluminium frame
Octane One by Shining 700c 32h tubeless ready rims

Ideal for: Extensive epic touring

Shop gravel and adventure bikes at Chain Reaction Cycles

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