Surface 604 Boar Hunter

2023 MountainFat bike Electric bicycle

Last known price: $2,799

Prices shown first for United States
Suspension: Rigid
Wheels: 26″
Drivetrain: 1 × 9 36t / 12–34t
Gear range: 283%
Battery: 672 Wh
Brakes: Hydraulic disc

Sizes

Size guide

17.5"
19"

The manufacturer did not publish rider heights for these sizes.

Components

12 of 19 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Electric system

3 parts

Battery

Watt Hours: 672 Wh, Details: Samsung 18650 2600 or 3500 mAh, Stock 14 Ah Battery 3.45 kg (7.5 lbs), Optional 20 Ah Battery 4.65 kg (10lbs), Weight: Stock 14 Ah Battery 3.45 kg (7.5 lbs), Optional 20 Ah Battery 4.65 kg (10lbs) Not identified
Display
- Bafang
Motor
- Bafang

Suspension

1 part

Fork

Rigid Aluminum Alloy, 150 mm Hub Spacing, 15 mm Thru-Axle with Quick Release Not identified

Drivetrain

4 parts

Cassette

12-34 Tooth Not identified
Crankset
- Samox
Rear derailleur
- SRAM X5 10 speeds
Shifters
- SRAM X5

Brakes

1 part

Brakes
- Tektro Auriga

Wheels and tires

1 part

Rims

26" Not identified

Cockpit and contact points

7 parts

Grips

Flat Rubber, Black Not identified
Handlebar
- ProMax
Headset
- FSA
Pedals
- Wellgo
Saddle
- Selle Royal
Seatpost

6061 Aluminum Alloy, Single Bolt Clamp Not identified
Stem
- Ergotec

Other components

2 parts

Lights
- Buchel
Racks

Front: Yes, Front Basket with Side Mounts, Rear: Yes, Trunk Bag Platform, Pannier Hanger Bar on Sides, Bungee Loops on Sides Not identified

Sizes and geometry

2 sizes

Rider-height ranges are not published for these sizes.

Size

Geometry not published

The manufacturer lists these sizes without frame measurements, so there is no drawing or geometry table.

Specifications

Frame and fork

Intended fit: Unisex
Fork material: Aluminum
Frame weight: 3.45 kg

7.6 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 9
Smallest sprocket: 12
Largest sprocket: 34
Lowest gear: 27.5 in
Highest gear: 78.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Electric system

Battery capacity: 672 Wh

Additional specifications

Battery: Watt Hours: 672 Wh, Details: Samsung 18650 2600 or 3500 mAh, Stock 14 Ah Battery 3.45 kg (7.5 lbs), Optional 20 Ah Battery 4.65 kg (10lbs), Weight: Stock 14 Ah Battery 3.45 kg (7.5 lbs), Optional 20 Ah Battery 4.65 kg (10lbs)
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 26″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.5 km/h
Highest gear: 29.9 km/h

Total gear range 283%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 27.5–78.0 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2023 builds

Differences across 2023 builds
Specification	This bicycle Surface 604 Boar Hunter	Surface 604 Boar Explorer
Drivetrain
Smallest sprocket	12	11
Lowest gear	27.5 in	29.1 in
Highest gear	78.0 in	90.0 in
Other specifications
Battery	Capacity: 672 WhWatt Hours: 672 Wh, Details: Samsung 18650 2600 or 3500 mAh, Stock 14 Ah Battery 3.45 kg (7.5 lbs), Optional 20 Ah Battery 4.65 kg (10lbs), Weight: Stock 14 Ah Battery 3.45 kg (7.5 lbs), Optional 20 Ah Battery 4.65 kg (10lbs)	Capacity: 672 WhWatt Hours: 672 Wh, Details: Included: 48V 14Ah / 672WhSamsung lithium-ion 18X650mm cells
Wheel size	26″	27.5″