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If you’re looking at the Megamo Reason range, one of the biggest questions is whether it’s worth stretching to a CRB carbon build – or whether a Reason AL alloy model gives you everything you actually need.
On paper, the answer sounds simple: carbon is lighter, pricier and usually better specced. But in real-world riding, the gap is more nuanced than that.
Both platforms are built around the same aggressive, modern Megamo Reason concept: a slim, full-power e-MTB with DJI’s Avinox motor, an 800 Wh battery, and geometry that feels far more sorted than many bulky full-power bikes.
This guide breaks down the real differences between Reason AL and Reason CRB builds – including weight, ride feel, value, spec, and which one makes most sense for your riding.
Need the full platform overview first? Our Megamo Reason review covers handling, sizing, suspension feel and the full model range in more detail.
🔑 Key Takeaways
🧭 Jump to:
The Megamo Reason platform – modern, slim and full-power, whether you choose alloy or carbon.
If you want the straight answer:
For many riders, the alloy bikes are the smarter real-world buy. You still get the same bold, modern platform and motor system, but with more budget left for pedals, protection, riding kit or future upgrades.
The carbon bikes make most sense if you already know you value weight savings, faster direction changes and a more premium out-of-the-box feel.
At a glance, the headline difference is obvious:
But that’s not the whole story.
In practice, you’re usually comparing differences in:
The core identity stays the same. Both are still part of the Megamo e-MTB line and both are built around the same modern full-power idea: slim frame lines, strong Avinox performance, and geometry aimed at fast trail and all-mountain riding.
| Area | Reason AL | Reason CRB |
|---|---|---|
| Frame | Hydroformed alloy | Carbon frame |
| Weight | Heavier overall | Lighter overall |
| Ride feel | Stable, planted, value-led | Sharper, more responsive, more refined |
| Spec level | Strong but more budget-conscious | Higher-end kit on most builds |
| Price | More accessible | Premium |
This is the bit that matters most for value-minded buyers: the core appeal of the Megamo Reason doesn’t disappear just because you choose alloy.
That’s why the AL bikes make so much sense. You’re not stepping into a watered-down platform – you’re choosing a different version of the same platform.
This is where most buyers start.
If you’ve already read our Megamo Reason weight guide, you’ll know the rough picture already:
That means carbon can save roughly 0.5–1.5 kg, depending on the exact build and spec.
Yes – but not equally for every rider.
The lighter carbon bikes usually feel:
The alloy bikes usually feel:
For plenty of UK riders, that difference is real – but not dramatic enough to justify a huge budget jump unless they already know they value a premium ride feel.
It’s worth saying clearly: not all of the difference comes from alloy versus carbon alone.
Suspension quality, tyre casing, wheels, brakes and cockpit setup all shape how the bike feels. A better-specced alloy bike can feel more convincing than a carbon bike with compromises elsewhere.
That’s why this decision is rarely just “metal vs carbon”. It’s usually “value package vs premium package”.
For a lot of UK riders, the honest answer is yes in some cases, but far from all.
If your riding is mostly trail centres, mixed-weather loops, natural descents and all-day weekend rides, the alloy bikes already deliver the main thing people like about the Reason – modern geometry, strong motor performance and a sorted full-power ride feel.
Carbon becomes easier to justify when you ride hard enough, often enough, and deliberately enough to appreciate the finer gains in weight, response and higher-end spec.
This is where the Reason AL range gets very interesting.
Because the alloy bikes still sit on the same platform, you aren’t buying a second-rate version of the bike. You’re buying a more attainable way into the same Megamo Reason concept.
That’s a big deal.
If you look at bikes like the Reason AL 03, Reason AL 05 and Reason AL 07, the appeal is obvious:
For riders who actually want to ride hard without worrying about chasing the lightest possible build, that’s a very strong offer.
In other words, the AL bikes often hit the point where performance, value and real-world use line up best.
The Reason CRB 03, Reason CRB 05, Reason CRB 07 and flagship Reason CRB 01 are for riders who want the full premium version of the platform.
That usually means:
If you’re already shopping at the upper end of the market, the CRB bikes make more sense because you’re paying for a more complete package – not just a different frame material.
Want to compare live builds side by side? Browse the full Megamo Reason range to see how the current AL and CRB models stack up.
This is the point where the choice usually becomes much easier. Once you stop thinking purely about frame material and start thinking about how you actually ride, the right answer tends to show itself pretty quickly.
For some riders, alloy is the obvious smart-money option. For others, carbon is worth it because they’ll genuinely notice the lighter, sharper feel every time they ride.
If you’re new to full-power e-MTBs, moving over from a heavier Bosch-based bike, or mainly riding mixed UK trail centre loops, the alloy bikes may give you everything you need.
The carbon option tends to make most sense when:
If you’ve already decided whether you lean alloy or carbon, the next step is working out which specific build makes the most sense. These are the models we’d naturally point most riders towards first.
For many riders, the Reason AL 05 is where the range really starts to make sense – strong value, full-power performance and no obvious weak point in the concept.
| Model | Why it stands out | Best for |
|---|---|---|
| Reason AL 05 | The likely sweet spot for riders wanting strong value without losing the full-power Reason experience. | Most UK trail and all-mountain riders |
| Reason AL 07 | A stronger alloy option for riders wanting a tougher build without jumping to carbon. | Heavier or more aggressive riders |
| Reason CRB 03 | A sensible way into the carbon side of the range without going straight to flagship money. | Riders wanting carbon feel with less financial pain |
| Reason CRB 01 | The premium showcase build with the sharpest, most complete top-end package. | Buyers chasing the best of the range |
Still weighing up the whole range? Browse all current Megamo Reason models or explore the wider Megamo range if you’re also considering gravel, road or other e-MTB options.
For most riders, the honest answer is this:
The better buy is the one that matches how much you’ll actually notice the difference.
If you want maximum value, the alloy bikes are incredibly convincing. You still get the character that makes the Megamo Reason interesting in the first place – Avinox power, a big battery, modern geometry and a sharp-looking frame – without needing flagship money.
If you know you want lower weight, higher-end kit and a more refined ride feel from day one, the CRB bikes absolutely make sense.
Neither option is the “wrong” one. It’s more a question of whether you want:
If you’re unsure which build fits your riding, budget and local terrain, the easiest next step is to shortlist a couple of bikes from the Megamo Reason range and compare them properly. In many cases, it becomes obvious once you see the builds side by side and think honestly about how much of the carbon advantage you’ll actually use.
If you’re still deciding between alloy and carbon, these are the questions most riders end up asking once they get past the headline differences.
It is lighter, yes – usually by around 0.5–1.5 kg depending on the exact builds being compared. Whether that feels “massive” depends on how sensitive you are to weight and ride feel.
No. The alloy bikes still ride on the same core platform and keep the main character of the Reason. The CRB models just feel lighter and more refined rather than transforming the bike completely.
For many riders, yes. If you want the Avinox system and full-power Reason platform without paying for a premium carbon package, the AL range makes a lot of sense.
Riders who know they value lower weight, a sharper ride feel and better out-of-the-box kit. It makes most sense if you’re already shopping at the premium end of the e-MTB market.
Yes – both sit on the same core Megamo Reason concept, with the same Avinox motor platform and 800 Wh battery idea. The main differences are frame material, overall weight and the level of components fitted to each build.
For most riders, the Reason AL 05 is a strong place to start for value, while the Reason CRB 03 is a sensible entry point if you know you want a carbon build.
