Mullet vs. 29er: how to choose the right MTB setup for you

Business in the front, party in the rear. This is the adage for the legendary 1980s haircut, the mullet. A combination of a short, sensible cut at the front, the business, combined with long hair at the back, the party, is one of the iconic looks of the era. Mountain bikers adopted this term as a kind of in-joke to refer to mixed wheelsize setups: a 29-inch front wheel, the business, and a 27.5-inch rear wheel, the party. 

Today, the mountain bike market is dominated by 29-inch and mullet setups. They each have their pros and cons, and it can be confusing trying to peel away the jargon and hype to find the right setup for you. This short guide will walk you through why they became popular and what kind of rider would suit which kind of setup.  

As the Great Mountain Bike Wheelsize Debate began to settle on 29-inch wheels, some riders started experimenting with smaller 27.5-inch wheels on the back. The benefits of a 29-inch wheel were undeniable; the big wheels make it easier to get up and over roots and rocks. Some riders, however, felt that these “29er” bikes were a little too hard to manage on tight, technical trails. By adding the smaller (27.5-inch) rear wheel, the theory was that you could get the best of both worlds - a front wheel that would roll over everything, combined with improved manoeuvrability at the back.  

Mullet setups have become the number one choice for downhill racing today, with few riders still running a full 29-inch setup at the World Cup. On the other end of the spectrum, the chances of anyone even experimenting with a mullet for cross-country racing are slim. It is undeniable that if you need to cover ground as quickly as possible, 29-inch wheels are the way to go. This is why the entire cross country field uses 29ers today. Once you step between these extremes, however, the question of mullet or 29 becomes a much more nuanced topic and the answer of which will depend on what you are looking for as a rider.  

For smaller riders, we think there is a strong argument for running a smaller rear wheel. With our Spectral trail bike range, which in most sizes can be switched between mullet and 29er, we decided that full 29-inch setups don’t make much sense for the smallest of riders. Having the larger rear wheel makes the bike harder to handle for them, so the XS is mullet-only.

There used to be an argument that taller riders would be better suited to a full 29er, but World Cup downhill racing has shown that this is no longer the case. Regardless of your height, the benefits of a smaller wheel on steep, technical terrain have been proven by our factory downhill team. This is why we have made the Sender downhill race bike mullet-only.

When choosing between a bike with a mullet setup and a full 29-inch one, the big question is which wheel size would best suit you and where you ride. You need to ask yourself whether covering ground or bike handling is your main priority. Thinking about the kind of trails you ride is a great starting point.  

Do your trails tend to be flatter with open corners? How important is climbing to you? If you usually ride on trails where carrying speed is more important than the ability to weave your bike through tight, technical sections, a 29-inch setup could be the right one for you. The bigger wheels will carry more speed and maintain it better through rough sections. The bigger wheels will also make the climbs that little bit easier. 

If you find yourself going down steep pitches and threading the bike through tight corners often, then a mullet might be a better option for you. On the steep sections, the smaller rear wheel allows you to get your weight back on the bike for confidence-inspiring descending. When you get to the corners, it will allow you to flick the bike through them with greater ease.  

If you are reading this and thinking, “My trails have both those things,” then the question is where do you find your fun? A full 29-inch bike is by no means difficult to ride on steep, technical sections, and will give you greater speed on the open sections. Flipping it around, a mullet will climb and hold speed really well, just not quite as well as the 29er, and can be a great recipe for more confidence when things get gnarly. 

The addition of a motor to a mountain bike changes the riding experience quite a bit, but wheelsize is one area that is not affected too much. Going downhill, it is still a question of whether you want to prioritise straight-line speed with a 29-inch wheel, or corner capability with a 27.5-inch wheel.

On the way up, there is an argument that a 27.5-inch rear wheel puts the rider in a better position for steep, technical climbs, while a larger wheel offers more grip with its larger contact patch and increased rolling speed. This is why, for our all-around trail-shredding Spectral and Spectal:ON models, we give riders the chance to switch between the two rear wheelsizes to suit their riding preferences.

In theory, any 29-inch bike can be converted to a mullet setup. With the larger 29-inch wheels, fitting a smaller rear wheel is not a problem. The drawback is that it will change the geometry, which may make the ride less enjoyable. The biggest issue with running a 27.5-inch wheel on a 29-inch bike is that it will lower the bottom bracket, which can mean your pedals will start hitting obstacles frequently. It also changes the riding position of the bike, tipping the weight backwards compared to the standard position. This will mean that the seattube angle becomes slacker, which could compromise climbing performance, and it will require your suspension to be re-adjusted to account for the new position.

Some mullet bikes may accept a 29-inch rear wheel, but it is very likely that there will not be clearance to fit the larger wheel in the rear triangle. If you are attempting this kind of conversion, we would recommend checking that there is space for both the wheel and tyre to fit your frame before you purchase a new rear wheel. If it can fit, you will find that the balance of the bike will have shifted forwards and the bottom bracket will be significantly higher, making the bike less stable at speed.  

Geometry plays a huge role in how your bike feels and handles, especially when experimenting with setups like these. To understand how angles and measurements affect your ride, check out our mountain bike geometry guide.

Trail riding can mean so many different things to so many different people. For some, it is all about covering ground and adventuring, while for others it is about tearing up the descents. It is the choose-your-own-adventure of mountain bike riding. This variety means that there is no single right answer for which wheelsize is best for trail riders.

This is why our award-winning trail bike, the Spectral, and its electrified counterpart, the Spectral:ON, are built around adaptable versatility. Both platforms feature an adjustable flip-chip in the chainstay that seamlessly accommodates either a full 29er or an agile mullet setup. Lengthening or shortening the chainstay maintains the bike's dialed geometry and balance regardless of your rear wheel choice, meaning you can swap setups with just an Allen key and zero handling compromises.

When you want to amplify the adventure, the Spectral:ON introduces the new Avinox M2S drive system. With an incredible 150 Nm of torque and 1,500 watts of smooth peak output, it conquers the steepest climbs with ease. Integrated with a sleek 700 Wh battery into a sub-21 kg carbon chassis, it delivers massive full-power performance without sacrificing the lively, nimble feel that makes the Spectral legendary.

Luca Shaw is the kind of rider who would have been pushed towards a full-29 setup in the past for World Cup downhill. Coming off one of his best-ever seasons in 2025 aboard the mullet-equipped Sender, he has no doubts. “I prefer Mullet over 29. I think it is more fun and playful, and also works better on my DH bike. I think 29 is great for smaller travel bikes but on the bikes I enjoy to ride most, mullet works best!” His teammate, Marine Cabirou, agrees, “I love the mullet. The bike is way more dynamic, much easier to control and place especially for me as I’m not very tall. I also have more space to move on my bike and I feel more comfortable. I like the mullet on all my bikes, trail bike, ebike, it means I can play even more on the trail.” 

Even though he is a shorter rider, former Enduro World Series champion Jesse Melamed is 29 all the way, “As a racer I have always preferred 29 for the rolling speed. As I transition out of racing I will experiment more with mullet to see if it's the more fun combination.” 

Our CLLCVT trail bike shredder, Braydon Bringhurst, agrees:  

If you are struggling to decide which wheelsize combination would suit you better, we think there is one simple exercise that can help:    

Write down ten rides that you would like to do in the next year.   

For each ride, think about what you find most fun on that ride and whether it would best suit a 29er or a mullet setup.   

• Choose a mullet if… You prioritise manoeuvrability. If you are looking to jump, drop, rip up the corners or shred your PBs going downhill, a mullet setup is for you. 
• Choose a 29er if… You are looking to go further and faster. 29-inch wheels are perfect for riders looking to cover distance. With their higher rolling speed and increased traction, they are ideal for long rides and exploring new terrain.  
• Consider both if… You are still struggling to choose. With the Spectral and Spectral: ON, you’re not locked into a single wheelsize because the bike can switch between them. This means you can experiment to find what you prefer or even switch your wheel setup to suit your ride.

Need some help deciding which Canyon mountain bike is right for you? We have a full set of buying guides to help every type of rider find a great bike. Maybe you are new to the sport and it all sounds very confusing? Our beginners’ guide to MTB will walk you through what you need to know to get started and hit the trails with confidence.  

If you have never ridden different wheelsize combinations, there is no substitute for riding them. The friendly, helpful teams at our Canyon Experience centres will be happy to talk you through the bikes and can help arrange test rides for you. If you feel like you are getting lost worrying about wheelsize, then it might be worth using our Model Finder tool to walk you through the questions to finding your perfect bike. Our Bike Comparison tool can help you compare individual models head-to-head.  

Whichever wheelsize you prefer, we know you’ll have a great time aboard whatever Canyon bike you choose. The only thing that really matters with mountain biking is how much fun you are having. See you out on the trails.