Surface 604 Boar Explorer

2023 MountainFat bike Electric bicycle

Last known price: $2,699

Prices shown first for United States
Suspension: Rigid
Wheels: 27.5″
Drivetrain: 1 × 9 36t / 11–34t
Gear range: 309%
Battery: 672 Wh
Brakes: Hydraulic disc

Not published by the manufacturer

Sizes and geometry

Components

13 of 21 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: Included: 48V 14Ah / 672WhSamsung lithium-ion 18X650mm cells Not identified
Display

SURFACE604 Color LCD Display with USB JackBigger display: 3.5" for 2023 Not identified
Motor
- Bafang

Suspension

1 part

Fork

Proprietary design, straight steerer Custom 6061 Aluminum fork Not identified

Drivetrain

6 parts

Brakes

1 part

Brakes
- Tektro Auriga

Wheels and tires

2 parts

Front hub

Surface604 Aluminum Not identified
Rims

27.5 Not identified

Cockpit and contact points

7 parts

Grips

Flat Rubber Not identified
Handlebar
- ProMax
Headset
- Samox
Pedals
- Wellgo
Saddle
- Selle Royal
Seatpost

Rigid Aluminum Alloy Not identified
Stem

SURFACE604 3D forged alloybarbore 31.8mm, height 45mm (New) Not identified

Other components

1 part

Lights
- Buchel

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: 11
Largest sprocket: 34
Lowest gear: 29.1 in
Highest gear: 90.0 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: Included: 48V 14Ah / 672WhSamsung lithium-ion 18X650mm cells
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 27.5″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.2 km/h
Highest gear: 34.5 km/h

Total gear range 309%

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: 29.1–90.0 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 Explorer	Surface 604 Boar Hunter
Drivetrain
Smallest sprocket	11	12
Lowest gear	29.1 in	27.5 in
Highest gear	90.0 in	78.0 in
Other specifications
Battery	Capacity: 672 WhWatt Hours: 672 Wh, Details: Included: 48V 14Ah / 672WhSamsung lithium-ion 18X650mm cells	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)
Wheel size	27.5″	26″