Mihogo Air Max vs GoTrax Tundra

On paper the GoTrax Tundra and the Mihogo Air Max line up unusually closely on spec: both are rated 750W, both reach 28 mph, both use a torque sensor, and both stop on hydraulic discs. Then you pick them up. The Tundra is an aluminum fat-tire bike that GoTrax lists at 78.1 lbs — Electric Bike Report weighed its test unit at 83.4 lbs[review] — against roughly 62 lbs for the carbon Air Max. This is the rare comparison where the motor spec isn't the deciding row; the chassis is. Every Tundra figure below comes from GoTrax's own product page, cross-checked against Electric Bike Report's independent test; every Air Max figure is first-party from mihogousa.com. (We're Mihogo USA, the Air Max's U.S. distributor — so read the rows where the Tundra wins as the honest part.)

Every GoTrax Tundra figure above links to GoTrax's own product page, with Electric Bike Report's independent test as a cross-check; Air Max figures are first-party from mihogousa.com. GoTrax lists the Tundra at $1,999 regular; the Air Max's $999 is its standard price, no code required. Electric Bike Report's review listed the Tundra at roughly $1,500 at the time of testing, so this is a price that moves. Always confirm current specs and pricing on the maker's site before buying.

Weight: 16 to 21 lbs, and you feel every one of them

This is the widest gap on the page. GoTrax lists the Tundra at 78.1 lbs;[source] Electric Bike Report weighed its test bike at 83.4 lbs.[review] The Air Max is about 62 lbs on a 7.7 lb Toray T800 carbon monocoque frame. Call it 16 to 21 lbs of difference.

None of that weight is wasted on the Tundra — it's a 960 Wh battery, 26″ × 4″ fat tires, a coil suspension fork and a steel-and-aluminum fat-bike chassis. But weight is the spec you pay for every single day if your bike lives up a flight of stairs, goes on a hitch rack, or has to come into an apartment. At 83 lbs, lifting the Tundra onto a car rack is a two-person job for a lot of riders. At 62 lbs, the Air Max is still heavy for a bicycle — it's just in a different category of heavy.

Battery and range: the Tundra has more Wh, and a tested number to show for it

The Tundra carries a single 48V 20Ah / 960 Wh pack[source] against the Air Max's two hidden 460.8 Wh packs (921.6 Wh total). That's about 4% more energy on board for the Tundra, and we'll say plainly that it's the bigger battery.

What matters more is that GoTrax's up to 74 miles claim has been independently tested. Electric Bike Report's range testing returned a spread of 44 to 99.6 miles depending on assist level — a result the reviewer described as one of the longest they've seen from a fat-tire e-bike.[review] Measured efficiency ran 21.8 Wh/mi at high power and 9.6 Wh/mi on low assist.[review]

The Air Max is rated up to 121 miles under ideal pedal-assist conditions. We should be equally clear about what that is: a best-case manufacturer figure, not a third-party test result. Real range on either bike depends on rider weight, terrain, wind, temperature and how much throttle you use — and fat tires cost energy that a street-tire commuter doesn't spend, which is part of why the Tundra's tested ceiling sits where it does despite the larger pack. Where the Air Max's architecture differs is that its 921.6 Wh arrives as two independent packs, and Mihogo USA ships two chargers so both fill at once. The Tundra's single pack is removable and can come indoors to charge, which the Air Max's frame-integrated packs cannot.

Motor, torque and the sensor: closer than any pair we've compared

Both bikes are rated 750W and both hit 28 mph.[source] Electric Bike Report measured the Tundra's Bafang motor at a 1,250W peak with 85 Nm of torque[review] — the same 85 Nm the Air Max is rated at, with a higher peak than the Air Max's 900W. On the numbers that decide hill pull, the Tundra is ahead on peak wattage and level on torque.

Two things are worth separating here, because they get run together constantly. Torque in newton-metres is a motor output rating — how hard the motor pulls. A torque sensor is a different component: it reads how hard you are pedalling and scales assist to match, instead of just detecting that the cranks are turning. Both bikes have both: GoTrax fits the Tundra with a torque sensor,[source] and the Air Max uses a bilateral torque sensor. This is a real point of parity and one reason the Tundra rides better than its price suggests — at $1,299, plenty of competitors still ship a cadence sensor.

On climbing, Electric Bike Report's hill test returned 1:50 at 16.5 mph on pedal assist and 1:58 at 15.4 mph on throttle alone.[review] The reviewer's stated complaint was delayed motor re-engagement after coasting — worth knowing if your commute is stop-and-go.

Load limits: 300 and 275 are not the same measurement

GoTrax quotes 300 lbs as a payload capacity — rider plus cargo combined.[source] Mihogo quotes 275 lbs as a maximum rider weight, TÜV Rheinland tested. Those are different bases, and subtracting one from the other — or subtracting bike weight from either — produces a meaningless number.

What's fair to say: the Tundra is the higher-capacity platform, which is what a fat-tire chassis with a suspension fork is for. If you're near either figure, or you plan to carry real cargo on the included racks, confirm the rider-only limit with GoTrax directly before you buy either bike.

Gearing, suspension and terrain

Gearing and front suspension are closer than the spec sheets make them look; terrain is where the Tundra pulls away. It has a Shimano 7-speed drivetrain,[source] a coil suspension fork,[source] and 26″ × 4″ fat tires.[source] The Air Max matches the first two in kind, with its own Shimano 7-speed (52T chainring, 14–28T freewheel) and a front spring fork, so the real gap is the tires: 4″ fat tires on a fat-bike chassis handle gravel, sand, snow and broken pavement in a way a 26 × 2.5″ street-tire commuter simply can't. Electric Bike Report also liked that the Tundra ships with cargo racks, a bottle cage and a phone mount included, and runs five speed-limited assist levels without an app or menu system to fight.[review] Its one component gripe: the over-the-bar shifter compromises steering control compared with a trigger shifter.[review]

The Air Max's limits here are its street tires and its rigid rear, and we say so plainly in our own review: the carbon frame damps road buzz, but it is a pavement commuter, not a trail bike. On smooth pavement, a lighter bike on street tires is faster and more efficient. Off pavement, 4″ fat tires win, and it isn't close.

Braking

Both run hydraulic disc brakes. Electric Bike Report measured the Tundra's average stop at 24′9″[review] — a reasonable figure for a bike weighing north of 80 lbs, and a reminder that mass has to go somewhere when you grab the levers. The lighter bike has less to stop.

Warranty and support

GoTrax covers the Tundra for 2 years;[source] the Air Max carries a 1-year limited U.S. warranty.[source] On paper that's a win for GoTrax and we'll list it as one. What we'd add is that Mihogo USA is operated by Snapcycle Inc., a California company, so warranty service and parts are handled domestically rather than through an overseas return path. Length of coverage and ease of using it are two separate things; weigh both.

So which should you buy?

• Riding gravel, sand, snow or badly broken pavement? Want fat tires? Carrying cargo? → GoTrax Tundra. 960 Wh, 44–99.6 mi tested range, fat tires, 300 lb payload, 2-year warranty, $1,299.
• Commuting on pavement, and lifting the bike onto a rack or up stairs is part of your day? → Mihogo Air Max. Roughly 16–21 lbs lighter, carbon frame, 921.6 Wh across two packs, up to 121 mi rated, $999.
• Flat city trips only? Both work. At that point the question is where the bike lives when you're not riding it — and 83 lbs up a stairwell is a decision you make once a day, every day.

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