Merida BIG.NINE 40

About the Merida BIG.NINE 40

Merida's BIG.NINE 40 is the hardtail that doesn't ask you to choose between trail fun and sensible money. Built around a TFS aluminium frame that's been given a proper geometry refresh - longer reach, slacker head angle, steeper seat tube - it's aimed squarely at riders who want modern handling without the premium price tag. The 120mm X-Fusion air fork is a meaningful step up from the coil springers that used to populate this price point, and the frame clears 2.4" rubber, so you're not stuck with skinny cross-country hoops when the trail gets loose.

This is Merida's entry ticket to proper mountain biking, but it's not a compromise bike. The frame is double-butted and technoformed - Merida's way of shaping complex tube profiles without adding weight or cost - and it's dropper-ready, so when you're ready to commit to descending with your saddle out of the way, the routing is already there. Shimano CUES handles the shifting across a 1x9 drivetrain with an 11-46T cassette, and MT200 hydraulic brakes haul you down from speed. It's a build that works, and it's designed to grow with you.

The BIG.NINE 40 sits in that sweet spot where capability meets accessibility. You're getting 29" wheels for momentum and roll-over, a frame that won't punish you when the trail gets rowdy, and a platform that rewards upgrades when your skills - or ambitions - outpace the stock kit. It's not trying to be a race bike or a mini-enduro rig; it's a hardtail that lets you ride more trails, more often, without the faff or the finance plan.

Merida BIG.NINE 40 geometry

The geometry here is what separates the BIG.NINE 40 from the upright, twitchy hardtails of a few years ago. Merida has stretched the reach and slackened the head angle to around 67 degrees, so the front end stays calm when the trail pitches down or the roots come at you in quick succession. You're not perched over the bars; you're centred, with room to move your weight back when gravity takes over. The longer front centre means the bike tracks predictably through rough sections rather than darting off line every time you hit a rock.

At the same time, the seat tube angle has been steepened to around 75.5 degrees, which plants you over the bottom bracket when you're climbing. Your weight stays forward, your pedal stroke stays efficient, and you're not fighting the bike to keep the front wheel on the ground. It's a posture that makes sense on long fire-road slogs and technical switchbacks alike. Merida also tunes the cockpit to frame size - smaller frames get narrower bars and shorter cranks, larger frames get wider bars and longer cranks - so the bike feels proportional no matter your height. It's a detail that matters when you're spending hours in the saddle.

The result is a hardtail that feels stable without being sluggish, and responsive without being nervous. You'll notice the difference most when you're descending: the bike holds a line, absorbs chatter through the tyres and fork, and doesn't punish you for being slightly off-balance. On the climbs, the steep seat angle and moderate chainstay length keep traction predictable, even when the gradient kicks up or the surface turns loose. It's not a race-bred XC position, but it's not a plodding tourer either - it's a geometry that lets you ride harder, longer, and with more confidence than you'd expect at this price.

Component choices & upgrades

The stock build on the BIG.NINE 40 is well-judged for the bike's intent. The X-Fusion Migo 32 air fork gives you 120mm of travel with a lockout lever, so you can firm it up for tarmac sections or open it up when the trail gets rough. It's not a premium chassis, but it's a significant step up from the coil forks that used to dominate this segment - you get adjustability, lighter weight, and more consistent performance. The Shimano CUES U4000 drivetrain is simple, reliable, and wide-ranging enough for steep climbs and fast descents. The 11-46T cassette paired with a 32-tooth chainring covers most terrain without leaving you spinning out or grinding to a halt. Shimano MT200 hydraulic brakes are entry-level, but they're hydraulic, and that means consistent modulation and stopping power in all conditions. The 160mm rotors front and rear are adequate for trail riding, though heavier riders or steeper descents might benefit from a 180mm front rotor down the line.

Kenda Booster tyres in 2.4" width are a smart choice - they're wide enough to offer real grip and comfort, and the frame's clearance means you can experiment with different tread patterns or compounds as your riding evolves. The Merida-branded rims are 20mm internal width, which suits the 2.4" casing well, and the Shimano TX505 hubs are solid if unexciting. When you're ready to upgrade, the frame's tapered head tube and dropper routing give you clear paths forward. A dropper post is the first upgrade most riders make - it transforms descending by letting you drop your saddle out of the way - and the internal routing is already there. Beyond that, a fork upgrade to something like a RockShox Recon or a Manitou Machete would sharpen the bike's trail manners, and a move to a 10- or 11-speed drivetrain would tighten the gear steps and improve chain retention. But none of that is urgent; the stock build is more than capable of getting you out on the trails and keeping you there.

Where the Merida BIG.NINE 40 excels

This is a hardtail for riders who want to explore trails without committing to a single discipline. It's outstanding at general trail riding - the kind of riding where you're mixing fire-road climbs with rooty singletrack descents, where the surface changes every few minutes, and where you need a bike that won't complain when you take a wrong turn and end up on something steeper or looser than you planned. The 120mm fork and modern geometry give you enough capability to tackle technical sections with confidence, and the 29" wheels keep momentum high when the trail flattens out or the surface turns fast.

It's also a very good bike for riders who are new to mountain biking or stepping up from an older, more basic hardtail. The geometry is forgiving - it won't punish small mistakes - and the components are intuitive. The hydraulic brakes work predictably, the 1x9 drivetrain is simple to operate, and the wider tyres offer reassurance when traction is marginal. Because the frame is dropper-ready and the fork is air-sprung, you're not buying a dead-end bike; you're buying a platform that can evolve as your skills and ambitions grow. It's equally at home on weekend trail rides, commuting duties, or as a fitness bike for riders who want something more engaging than a road bike.

Where it's less ideal is on race-day XC courses or ultra-aggressive trail riding. The component spec is entry-level, so if you're chasing podiums or hammering technical descents every weekend, you'll outgrow the brakes, fork, and drivetrain fairly quickly. The quick-release rear axle is less stiff than a thru-axle, which matters if you're sprinting out of corners or loading the rear wheel hard in rough terrain. And while the bike is light enough for a hardtail at this price, it's not a featherweight - if you're obsessed with KOMs or racing against the clock, you'll notice the extra grams. But for the vast majority of riders - those who want a capable, versatile hardtail that rewards effort and doesn't demand constant fettling - the BIG.NINE 40 hits the mark.

Merida BIG.NINE 40 FAQs

What is the best beginner hardtail mountain bike?

The Merida BIG.NINE 40 is a strong contender for beginners because it combines modern trail geometry with reliable components and a price that doesn't require a second mortgage. The 120mm air fork, dropper-ready frame, and 2.4" tyre clearance give you room to grow, and the Shimano CUES drivetrain is simple enough to operate without being limiting. It's a bike that won't hold you back as your skills develop, and it's versatile enough to handle everything from local trails to weekend adventures.

How much travel does the Merida BIG.NINE 40 have?

The BIG.NINE 40 comes with 120mm of front suspension travel via the X-Fusion Migo 32 air fork. That's enough to smooth out rough trails and technical sections without feeling over-forked or sluggish on climbs. The fork also features a lockout lever, so you can firm it up for tarmac or smooth fire roads and open it back up when the terrain demands it.

Can I fit wider tyres on a Merida BIG.NINE 40?

The frame clears up to 2.4" tyres, which is what the bike ships with - Kenda Booster 29x2.4". That's generous clearance for a hardtail at this price, and it gives you plenty of options for different tread patterns or compounds. You won't be able to fit true plus-sized tyres (2.6" or wider), but 2.4" is wide enough to offer real grip, comfort, and confidence on loose or rough trails without sacrificing rolling speed.

What is the geometry of the Merida BIG.NINE 40?

The BIG.NINE 40 features modern trail geometry with a longer reach, a slacker head angle (around 67 degrees), and a steeper seat tube angle (around 75.5 degrees). The longer reach and slacker head angle improve stability and control on descents, while the steeper seat tube angle keeps you centred over the bottom bracket for efficient climbing. Merida also tunes the cockpit components - handlebar width, stem length, and crank arm length - to each frame size, so the bike feels proportional and balanced no matter your height.

Is the Merida BIG.NINE 40 good for trails?

Yes, the BIG.NINE 40 is designed specifically for trail riding. The 120mm fork, modern geometry, and 2.4" tyre clearance give you the capability to tackle technical singletrack, rooty descents, and loose climbs with confidence. It's not a race-focused XC bike, nor is it an aggressive enduro rig, but it's a versatile hardtail that handles a wide range of trail conditions without complaint. If your riding mixes fire roads, singletrack, and the occasional rocky descent, this bike will keep up.

What components does the Merida BIG.NINE 40 come with?

The BIG.NINE 40 is built around a Shimano CUES U4000 1x9 drivetrain with an 11-46T cassette and a 32-tooth chainring, giving you a wide gear range for climbing and descending. Braking is handled by Shimano MT200 hydraulic disc brakes with 160mm rotors front and rear. The fork is an X-Fusion Migo 32 air unit with 120mm of travel and a lockout. Wheels are Merida-branded rims with Shimano TX505 hubs, and tyres are Kenda Booster 29x2.4". The cockpit is size-tuned, with handlebar width, stem length, and crank arm length adjusted to match each frame size.

What is the weight of the Merida BIG.NINE 40?

Merida hasn't published an official weight for the BIG.NINE 40, but based on similar builds and the component spec, you can expect it to land somewhere in the region of 14 - 15 kg. That's typical for an aluminium hardtail at this price point with a 120mm air fork and entry-level components. It's not a lightweight race bike, but it's not a boat anchor either - it's a practical weight for a bike designed to be ridden hard and maintained easily.