Neuron:ONfly CF 9

On an MTB, the speed score centers on rolling efficiency when you're pedaling, especially on easier terrain. Versus the most speed-focused options, this build is shaped by a heavier build, typical trail-width tires, and a high-end drivetrain that tends to feel crisp under load. When you're pedaling, the tire setup is biased toward rolling speed on firm ground.

On steep roads, it comes in at 7.8/10. Within e-mountain bikes, this comes out above average. On climbs, the lowest gear feels very easy. That lowest gear comes out around 16.6 gear inches. It’s about as easy as it gets in its peer group — easier than roughly ~99% of similar bikes. Think of “gear inches” like a difficulty score for your easiest gear: lower = more spin-friendly on climbs. At about 19.9 kg, it’s a heavy build; the low gear matters even more when the slope kicks up. Being an e-bike helps on climbs because the assist adds steady push when you need it. You’ll be able to keep a steady spin even when it gets steep. Real-world feel depends on setup and size, and some details aren’t always listed, so this is best seen as a well-informed estimate.

For suspension control, it lands at 7/10. Category: “High-impact ready”. It typically supports higher-speed rough sections where impacts stack up quickly. Full suspension helps the bike stay calmer under braking and cornering on rough sections. This level is meant to keep the bike composed when hits are bigger and frequent. Suspension travel is the amount of movement available over bumps — here it’s about 140 mm up front and 140 mm at the rear. More travel usually means more room to absorb bigger hits.

Sporty fit - a performance-leaning position that encourages speed. This is mainly because handlebar height is roughly 85 mm lower than the saddle (large drop), and how far you'll be stretched forward is about 629 mm (very long). Estimated lean is about 35 degrees.

What drives the fit flexibility here: This front-end is not locked into a one-piece system, which helps adjustability; Routing is relatively straightforward, which helps when you change cockpit parts. That is why we tag it Moderately Adjustable.

Comfort comes out to 8.0/10, which usually translates to a plush ride. That’s why it’s labeled Comfortable. It’s running about 60 mm tires on 29" wheels, and the big tires calm small hits and take the edge off trail chatter on roots, rocks, braking bumps, and repeated hits. The posture is forward, attacking (posture 8/10, torso ~35°), which puts you in an attack stance, which can feel more intense on long, rough descents.

The value looks a bit weak compared with similar options. The value score is 1–10. Higher means better value for money; lower means the price is high for what you get. Uses MSRP as a baseline; real-world prices can be lower (discounts can change the value). Based on the spec estimate, it’s about 23% above the typical level for similar builds. Compared with similar bikes, it trends a little expensive (cheaper than about 34% of listings). Quick reference: €7.350 listed versus about €5.952 for a comparable build. Bottom line: you may be paying extra versus similar options.

This bike is built for everyday trails with a mix of roots, rocks, and turns. It has about 140 mm of suspension travel (how much it absorbs bumps), which works well for everyday trails. Overall, the setup matches this surface range well.