When Aipas approached me to test their new M1 Pro / Xterrain ST model, I was curious: can a sub-$1,000 (sale price) fat-tire eBike really deliver on ambitious specs? After putting it through pavement, gravel, and dirt runs (as you saw in the video), here’s what I found.
First Impressions & Build Quality
On unboxing and assembling, the M1 Pro (or Xterrain ST variant) immediately gives off a rugged, no-frills vibe. The frame feels solid, welds look clean, and the step-through option is a nice touch for accessibility. The fat 4.0″ tires, front fork, and robust battery integration make it clear this bike wants to tackle mixed terrain—not just smooth streets.
In the video, you can see how it handles switching between pavement and rougher ground. It transitions smoothly—no awkward jerks—thanks to the long wheelbase and stable geometry.
For components, it includes (depending on version):
- Shimano 7-speed derailleur
- Removable Samsung (or equivalent) battery pack
- Cable disc brakes
- Buckhorn or riser handlebars
- Turn signals, headlight, and horn
- LCD display with PAS levels
These features help it feel more “complete” out of the box, rather than a barebones kit.
On-Road & Off-Road Performance
Top Speed & Assist Behavior
In the video, I pushed it in PAS 5 mode and downhill, and the display flirted with 36–41 mph in bursts (though GPS confirmed somewhat lower.) On flat ground, I saw stable cruise speeds around 25–30 mph in higher assist levels.
The PAS modes are gradual and usable: PAS 1 gives a gentle push; by PAS 3 you’re getting solid support without trying to overpower the bike. PAS 5 gives the full throttle boost—but battery and terrain conditions influence how far that lasts.
Ride Comfort & Handling
The fat tires soak up a lot of vibration, and the front suspension (when unlocked) adds comfort on rougher trail segments. Turning is stable thanks to the wide profile, though you feel the mass. On tight switchbacks or sharper turns, you need to ride it deliberately.
Braking is serviceable but not flawless. The cable disc brakes hold—but when you’re riding fast with extra weight, I wish they were hydraulic. In the video I called out that high-speed stops can feel marginal, and that’s something you’ll want to adapt to.
Realistic Range & Efficiency
Aipas advertises up to an 85-mile range in favorable conditions. In practice, during my mixed rides (some off-road, some pavement, using mid to high assist), I got closer to 40–60 miles. Terrain, rider weight, wind, and use of PAS levels changed results more than I expected.
One commenter in the Facebook group also noted that 60–70 miles is more realistic on lower assist modes: “I think 60-70 mile range is achievable …”
So, if you’re expecting to push PAS 5 all day, budget more conservatively.
Pros & Cons
Pros
- Strong power / accelerationYou feel the motor’s grunt when you open it up. It’s much more lively than budget commuter eBikes.
- Complete package out of the boxWith turn signals, lights, horn, fenders, and a solid battery, it’s ready to ride—no major accessories required.
- Comfort over mixed terrainFat tires and front suspension make it forgiving over gravel, uneven pavement, and trails.
- Good value for feature setConsidering what you get (power, inclusions, capability), it’s competitive with many bikes costing much more.
- Stability & predictable handlingThe geometry gives you confidence at speed, and it doesn’t feel twitchy.
Cons
- Braking under stress The cable disc brakes work, but at high speeds or downhill, they’re not as confidence inspiring as hydraulic brakes would be.
- Weight & bulkIt’s a heavy bike. Lifting it (for transport or in tight spaces) is challenging.
- Range limitations under aggressive use The “85 mile” claim only holds in ideal circumstances. Use aggressive assist, terrain, or extra load and expect less.
- Support, parts, and long-term durability As with many direct-to-consumer brands, getting replacement parts or service support might be harder in some regions.
- Legal & safety considerations Speeds above 28–32 mph may tip you into classifications (or restrictions) in your jurisdiction. Always check your local e-bike laws.
Final Thoughts
The Aipas M1 Pro / Xterrain ST is a compelling pick for riders wanting a powerful, all-terrain eBike without paying a premium. It’s not perfect—and it won’t hit all its claimed numbers under every condition—but it delivers far more than you’d expect at its price point.
If you’re planning mostly city with light trail use and aren’t chasing max range or top speed nonstop, the M1 Pro is a strong contender. Just budget a little conservatively for battery performance and ease into the braking dynamics.
Learn more: Coupon Code: RIDEWELL
