Tern Orox S12 All-Terrain Electric Cargo Bike
- Class 1
- 601-800 Wh
- Over 80 mi claimed
- Over 400 lb max load
SVT Score, Upper
A longtail cargo bike on fat tires for snow and dirt, with a large Bosch pack, four-piston brakes and GPS tracking, but over 80 lb.
$4,999
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Usability
5.3 out of 10- Option: dual-battery ready, 1,450 Wh with a second pack sold separately
- Range: 52-91 mi claimed on one pack
Better on batteryTern Orox R14The Orox R14 carries an 800 Wh Bosch pack. $6,999Scores 7.0- Load: 463 lb gross on pavement, 397 lb off-road
Better on weightTern HSD S11At 61.9 lb it is light for the cargo ladder. $4,499Scores 9.0- Searched: Intertek SGS Certipedia UL TÜV SÜD CPSC Health Canada
- Record: Intertek ETL, ANSI/CAN/UL-2849 (Electrical Systems for eBikes), none: drive-system listing, does not name any Tern bike, ROBERT BOSCH LLC - Foothill Ranch, CA
- Record: SGS, not printed (Recognised External Approval/Certification Scheme; EPAC, EU-spec model codes), Orox S12 29" 3PCxEU25, LEVA Group Pty Ltd
- Frame: Tern frame, fork and handlepost five years, ten with Tern Care; other Tern parts one year
Strengths
- Huge tires grip snow and dirt
- Powerful four-piston brakes
- GPS tracking and alarm built in
- High payload on and off road
- Large battery with room for a second
Drawbacks
- Very heavy to lift
- Rigid fork passes bumps through
- Kickstand can feel unstable
- Tires lack listed puncture protection
- Long frame is hard to store
- Alarm and tracking need a paid subscription
A go-anywhere cargo hauler for snow and trails, but very heavy
Specs
- TypeCargo
- E-Bike ClassClass 1
- Battery601-800 Wh
- MotorMid-drive
- Top SpeedUp to 20 mph
- Claimed RangeOver 80 mi
- Weight71-85 lb
- Max Rider LoadOver 400 lb
- BrakesHydraulic disc
- SuspensionNone
- FoldingDoes not fold
- CertificationsClaimed only
- Warranty2 Years
At a glance
- Stud-ready Vee Snow Ball
- Deore XT 1x12 drivetrain
- Medium and Large frames
- Stile Products, Inc. of Lakewood, California operates that store.
- The brand is owned by Mobility Holdings, Ltd. of New Taipei City, Taiwan, which also issues the warranty.
- Tern e-bikes are sold in the US through Tern Store USA at store.ternbicycles.com.
- Every e-bike ordered online ships to the nearest authorized Tern dealer, or to a certified shop where no dealer is near, for assembly and pickup.
- Authorized bike dealers across the US also sell the range, from ultra-low-step city bikes and compact folders to fat-tire longtails.
- The search turned up no Tern e-bike sold on Amazon by Tern or an official Tern store (October 2026).
- The store takes returns within 30 days of purchase.
- Of the eight major US retailers, only REI sells Tern e-bikes, and no Tern listing there reaches ten reviews (the Quick Haul P9 Sport leads with 7); Walmart, Best Buy, Target, Costco, Dick's Sporting Goods, Home Depot and Lowe's carry none (October 2026).
The Tern Orox S12 is a longtail all-terrain cargo e-bike on the Bosch Smart System, with a Performance Line CX mid-drive rated 85 Nm and a 725 Wh Bosch pack; Bosch prints watt-hours only. It is dual-battery ready for 1,450 Wh with a second pack.
It has Magura MT5 four-piston hydraulic brakes on 203 mm rotors, a rigid chromoly fork and 27.5 x 4 in Vee Snow Ball tires that take studs. Tern lists 81.8 lb in size medium, a 463 lb maximum gross vehicle weight on pavement and 397 lb off-road, and 220 lb on the Atlas X rack.
A Kiox 300 colour display, eBike Lock and a ConnectModule for alarm and tracking (Flow+ subscription) are included. It assists to 20 mph with no throttle, and Tern claims 52 to 91 miles on one pack. Shimano Deore XT 1x12 gearing, lights and fenders are fitted. Medium and Large frames sell at one price.
Every order ships to a Tern dealer for assembly and pickup.
Compared in
Questions answered from our data
How much does an electric bike cost?The 198 electric bikes we list run from $799 to $12,500, with a median of $1,947.
Are electric bikes UL certified?77 of the 198 electric bikes we list carry a UL 2849 listing we could look up by model.
How far can an electric bike go?171 of the 198 electric bikes we list claim 41 miles or more on a charge, each on its maker's own basis.
Which electric bikes have a battery over 1,000 Wh?10 of the 198 electric bikes we list have a battery over 1,000 Wh, as their makers rate it.
