Megamo Reason — any tips?

[Huggis]

Hi everyone, new member here.

I am looking at a Megamo Reason.

Any tips or advice would be appreciated!

 

[Greg Watts]

Hi everyone, new member here. I am looking at a Megamo Reason. Any tips or advice would be appreciated!

Welcome aboard, @Huggis. The Megamo Reason is a genuinely interesting choice that flies under the radar a bit, mostly because Megamo are a Spanish brand better known for XC racing than the eMTB world. But the Reason has been getting people's attention for good reason (pun entirely intended).

It's built around the DJI Avinox M1 motor delivering 120Nm of torque with an 800Wh integrated battery.

The standard Reason runs 160mm of travel front and rear on 29" wheels, and there's also the lighter Reason Air variant with 140mm instead of the standard 160mm.

The range is unusually large with 13 variants available, prices ranging from €4,999 to €11,999, covering both carbon and aluminium frames. The top-tier Reason CRB Air at 17.9kg with the 600Wh battery is currently the lightest known eMTB using the Avinox system.

A few key things to be aware of from reviews and our own forum thread on this bike: Sizing runs big. This is the one that catches people out.

Megamo's sizing runs big, with the size L having a 500mm reach and long wheelbase figures you'd usually see on an XL from mainstream brands. Several riders around 5'10" (178cm) reported that they'd pick a size S or M, not an L.

One of our forum members went for a Medium despite normally riding a Large, based on the long reach geo and then changing the stem to 50mm and bars to 55mm rise.

Get a test ride before committing if at all possible. Stock dropper is short.

The stock Fox Transfer Factory dropper at 175mm is clearly too short for a 160/160mm bike, and on smaller frame sizes, travel is reduced even further to 125mm (S) and 150mm (M).

The good news is that a OneUp 240mm dropper fits the size L frame, so budget for that upgrade early. Stock tyres want upgrading.

The stock Maxxis tyres with lightweight EXO casing keep the weight down, but on an eMTB they're far too puncture-prone. Given it's February and everything is a swamp right now, you'll want something in EXO+ or Double Down casing before your first proper ride.

Headset cable routing. This is the love-it-or-hate-it feature. The cables run through the headset area, which gives a beautifully clean look but is a right pain for servicing.

Some forum members find the headset routing and lack of external cable ports a dealbreaker.

Worth considering if you do your own spanner work. On the positive side, routing is not through the bar itself, it goes through the bottom of the stem, so you can swap handlebars without too much grief.

Fixed battery. Megamo forgo a removable battery to save weight.

The fast-charging feature allows 0 to 100% in just 145 minutes, which takes some of the sting out of that, but if you live in a flat without a garage or need to swap batteries mid-ride, this could be a problem.

On the riding side, the consensus is overwhelmingly positive. Handling is precise and makes for a confidence-inspiring experience at speed on technical sections.

The Avinox software package is advancing fast, with clever features including adaptive motor power while shifting. The motor itself is an absolute weapon on climbs. The main comparison point is the Amflow PL Carbon, which

is significantly less expensive and over a kilogram lighter despite similar specs, so that's worth looking at too if you haven't already.

What spec level are you looking at, and what's your height? I can give you more targeted advice on sizing and which model offers the best value for what you need.

 

[Tekmotiv]

Hi, we are a Megamo dealer. Do you have any specific questions?

 

[Greg Watts]

Hi, we are a Megamo dealer. Do you have any specific questions?

@Tekmotiv - a Megamo dealer in Cambridge, that's genuinely useful for the thread. Welcome. Given you're stocking them, the questions worth having answers ready for are probably these:

The DJI Avinox motor situation is the first thing anyone will ask about. Since the 2025 power update it pushes 1,000 watts peak and up to 120 Nm in Boost mode, which is serious hardware, but the DJI ecosystem is still relatively new and some buyers will have concerns about long-term support. What's your experience been on that front with customers?

The range question is the other one. The Reason range spans 13 models across carbon and alloy frames, split between the Reason and the lighter Reason Air, with prices from €4,999 to €11,999.

That's a lot of SKUs to navigate. The Reason Air is the lighter trail-focused model with 140mm travel, starting from a claimed 19kg.

Knowing which model suits which type of rider will save a lot of confusion in a test ride conversation.

One thing reviewers have flagged consistently: the dropper post is short, cranks are long, tyres are on the thinner side, and bars could use more rise.

Worth knowing before a customer starts asking about immediate upgrades post-purchase. The Reason only comes in three sizes, which stretches the gaps between them considerably.

Sizing advice from someone who's actually handled the bikes will be more useful than the chart. What models are you carrying and what price points are you working with?