Cyrusher XF900 Mountain Motorcycle-Style Review: A Throttle and Real Climbing Grunt for $2,299
A rugged, throttle-equipped fat-tire off-roader with a big battery and real climbing grunt, though its range and outright punch are where it gives ground to rivals.
The Cyrusher XF900 Mountain Motorcycle-Style is built for riders who want to leave the pavement behind and stay out there: fire roads, gravel, packed dirt trails, and the odd sandy or muddy stretch. The 26" x 4" fat tires and the beefy motorcycle-style frame give it a wide, stable footprint on rough ground, and 80 means it can drag itself and a rider up a loose climb from a dead stop.
It carries a big , a so you can ride without pedaling, and a setting you switch in the display. In Class 2 the throttle gets you up to 20 mph without pedaling, and in Class 3 runs to 28 mph. At $2,299 it earns a Genius Score of 65 out of 100, marking a well-built off-roader whose main limits are how far it really goes between charges and an acceleration that a few rivals beat.
Pros & cons
What we like
- A genuinely tough build: front and rear, puncture-resistant fat tires, and a frame made to take a beating.
- 80 pulls a loaded bike up dirt climbs from a standstill without bogging down.
- A lets you launch from a stop or cruise along without turning the pedals.
- The is large for a fat-tire bike, giving you a real cushion of miles between charges.
- The 330 lb payload is high enough to carry a heavier rider and still haul camping or hunting gear out to a remote spot.
Worth weighing
- Acceleration off the line is only middling for the price, so a rival with a punchier motor will pull ahead when you both launch from a stop.
- Range is a genuine soft spot: even against other fat-tire off-roaders at this price, the XF900 doesn't go as far between charges, so demanding terrain has you planning around the battery.
Key specs
The motor & power
The XF900 runs a 750W Bafang motor, and on a fat-tire build like this that lives in the rear . For off-road riding the number that matters most is the 80 , which is enough grunt to haul the bike and a rider up a loose, steep climb instead of stalling halfway.
Cyrusher lists a continuous rating alongside a peak. The 750 is what you feel most of the time; the peak is a short burst for pulling away or cresting a sharp pitch, so judge the bike on that steady number.
That setup handles the terrain this bike is meant for, from dirt roads to gravel to packed trail. It's built for steady pulling power more than a violent launch, so anyone chasing the quickest jump off a stop will find a few rivals near this price that hit harder.
Cyrusher's marketing copy mentions a 1,000-watt peak, but the detailed spec sheet lists 1,500. We go with the 1,500 from the spec sheet, and either way it's a brief burst, not output you'll see all day.
Range & battery
The 48V, 17Ah pack works out to about 816 , which is a healthy tank for a fat-tire bike. Cyrusher claims on a full charge.
That 62 is a best-case figure from gentle, flat riding. On real terrain, soft dirt, climbs, the extra drag of 4-inch tires, and stretches spent on the throttle all pull the number down, so plan on covering fewer miles before you head somewhere remote.
The XF900 is one bike with a switchable setting you change in the display. In Class 2 the is live and both throttle and cap at 20 mph, which is usually what keeps you legal on bike paths and multi-use trails. Switch to Class 3 and assist runs up to 28 mph, better suited to roads and bike lanes. Riding hard on the throttle, especially in the faster setting, is what drains the battery quickest.
Ride & components
Stopping a 75-pound bike from 28 mph takes real brakes, and the XF900 has them: Tektro/Zoom 180mm discs at both ends. bite hard without you crushing the lever, and having them front and rear is a genuine plus at this speed.
Those 26" x 4" Chaoyang tires are the reason it floats over roots, rocks, and sand instead of getting hung up, and they're puncture-resistant on top of that. The trade is a bit more effort on smooth pavement, which comes with any fat tire.
Shifting is where Cyrusher kept costs down. The Shimano 7-speed setup is entry-level, which is typical for a fat-tire e-bike at this price, and seven gears cover the basics as long as you're happy leaning on the motor to climb rather than fine-tuning your pedaling.
Worth calling out for anyone who rides loaded: the 330-pound payload swallows a heavier rider and a full pack, or lets you strap cargo to the rear rack for a supply run to camp.
Price & value
At $2,299 the XF900 sits right in the middle of the off-road pack, and the money buys a lot of hardware: the big battery, dual hydraulic brakes, the tough frame, fat tires, and a throttle.
You're paying a sensible price for the capability on offer here rather than stealing a deal, and the drivetrain is the clearest spot where Cyrusher trimmed. If a wide gear range matters to you, factor that in before buying.
Who it's for
The mixed-terrain weekend explorer
If your riding is a blend of gravel roads, dirt trails, and the occasional sandy or muddy patch, this is a natural fit. The fat tires and strong low-end pull handle loose, uneven ground, and the big battery gives you room to roam before you have to turn back.
The rider who'd rather not pedal
If you like the idea of twisting a and letting the bike do the work up hills and away from stops, the Class 2 setting lets you ride to 20 mph without pedaling at all. Just know that riding that way regularly cuts into how far a charge lasts.
The all-day backcountry rider
If you're planning long rides deep into the backcountry, the real-world range is the thing to check first. The 62-mile claim assumes easy conditions, so on rough terrain you'll want a charging plan or a shorter loop rather than counting on the full number.
The rider chasing maximum punch
If a neck-snapping launch off every stop is what you're after, this isn't the bike that delivers it. The 80 Nm of torque pulls strongly and climbs well, but the jump off the line is middling for the price, so look at punchier rivals if raw acceleration is your top priority.
Frequently asked
Does the Cyrusher XF900 Mountain Motorcycle-Style have a throttle?
Yes. The XF900 has a , so you can pull away from a stop or cruise along without pedaling. The throttle is active in the Class 2 setting.
Can you ride the Cyrusher XF900 Mountain Motorcycle-Style without pedaling?
Yes. In its Class 2 setting the throttle lets you ride up to 20 mph without turning the pedals. Riding on the throttle a lot does drain the battery faster than pedaling with assist.
Can you change the class on the Cyrusher XF900 Mountain Motorcycle-Style?
Yes. It's a switchable bike that you adjust in the display settings. Class 2 keeps the throttle live and caps speed at 20 mph, which is usually what's allowed on bike paths, while Class 3 raises assisted speed to 28 mph for roads and bike lanes.
How far does the Cyrusher XF900 Mountain Motorcycle-Style go on a charge?
Cyrusher claims up to 62 miles from the 816Wh battery. That's a best-case number, so on real off-road terrain with the fat tires and throttle use, plan for noticeably fewer miles.
How fast does the Cyrusher XF900 Mountain Motorcycle-Style go?
It reaches up to 28 mph with pedal assist in the Class 3 setting. In Class 2, both the throttle and assist top out at 20 mph.
How much does the Cyrusher XF900 Mountain Motorcycle-Style weigh?
The XF900 weighs 75 pounds with the battery installed, which is normal for a fat-tire off-road e-bike.
How much weight can the Cyrusher XF900 Mountain Motorcycle-Style carry?
It has a total payload capacity of 330 pounds, which covers the rider along with cargo or gear on the rear.
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Read the reviewHow we score: the Genius Score blends a bike's capability against same-price peers with its value for the money, weighted for what this off-road buyer prioritises. Specs are pulled from the manufacturer's live page and normalised (nominal vs peak watts, true weight with battery). Ratings are our estimate from specs, not a lab test.