Everything you love about the original Big Sur is back! Now sporting 20" x 4" fat tires, Big Sur Sport is smaller and lighter, but it's just as fun and performant as Big Sur 26", if not more so! This bike retains the original's class 2/3 rating (20mph and 28mph top speed using the throttle and PAS respectively), as well as its safety features, including big 203mm brake rotors, LG 21700 battery cells, and a full UL2849 certification. Equipped standard with the AIMA Comfort XL seat and an MIK rear rack, Big Sur Sport delivers the same level of power, comfort, and smoothness of its bigger brother.
Pedal Assist
Higher levels of pedal assist will allow for an easier ride, but will also draw more power from the battery. Lower pedal assist levels are better for getting as many miles as possible out of your battery.
Average Cruising Speed
Riding slower will decrease the amount of energy you lose to wind resistance as the bike pushes you forward. Slower speeds will extend battery life.
Tire Pressure
Keeping your tires inflated to the recommended pressure can help increase your range. Maintaining a proper tire pressure not only increases your range, but also helps prevent pinch flats! For most riding situations, checking your tire pressure at least once a week will keep your ride safe and energy-efficient.
Load Weight
Carrying a heavier load can decrease your range. This includes the total load of both the weight of the rider and any cargo you may be carrying. More weight takes more time and energy to get up to speed, negatively affecting your range. It's best to keep loads light whenever possible if you're looking to extend your range.
Terrain & Elevation
In general, riding over smooth and flat terrain will give you a longer range. Hills and rough terrain can greatly impact your maximum range, especially on higher assist levels.
Wind
That's right! The wind can affect your battery range too! Riding into a headwind will decrease your range, but if you're able to catch a tailwind, you'll actually see that you'll gain more range! Be mindful of which way the wind is blowing when you are riding. If you've been riding in a tailwind, turning around will take more energy from the battery to get you home.
Ambient Temperature
Riding in cold weather will impact the battery's ability to function optimally. A good rule of thumb is, if you're comfortable, then the battery is comfortable too. This also goes for storing the battery too!
Hub Motor and Battery
There's few places you can't go with Big Sur Sport, thanks to its powerful 750W (nominal) rear hub motor by Bafang paired with a 48V 15Ah high-capacity battery.
Torque Sensor
Rather than relying on an outdated cadence sensor to detect your movement, our torque sensor is able to instantly feel how hard you're pedaling at any given time and instruct the motor to match your performance, improving safety and efficiency.
Full Color Backlit LCD Display
Everything you need is right in front of you at all times, including your current speed, battery remaining, distance traveled, and much more.
20” x 4” Fat Tires
20” x 4’’ tires enable you to traverse any terrain with ease while retaining the nimble feeling of a 20" tire. It's the best of both worlds!
Suspension Fork
Offering 80mm of travel and adjustable preload & lockout functionality, our suspension fork provides a smooth and comfortable ride feel throughout a wide variety of riding conditions.
Fender & Rear Rack
Fenders come pre-installed to ensure you'll be able to tackle all sorts of weather conditions. Plus, an included MIK HD rear rack means there's no limit to what you can take with you.
Flat Position Welding
We've applied one of the most advanced aluminum welding processes to our frame, an exclusive "flat position welding" technique. This allows the frame to maintain its strength and rigidity while also appearing smooth and flat.
Walk Assist
Gone are the days of pushing your bike around by hand. Our walk assist function allows the bike to maintain ~2-3mph (walking speed) as you push it alongside you, up a hill, or anywhere else.
Controller Compartment
Mid-drive? Not quite! Our mid-mounted controller cavity allows for streamlined assembly and repair, while also bolstering the controller's heat dissipation capabilities, improving the bike's performance and safety.
Specifications
- MODEL: Big Sur Sport
- MOTOR: 750W (Rated) / 1200W (Peak), 48V Brushless Rear Hub Motor
- THROTTLE: Throttle on Demand
- DISPLAY: Color LCD, Smart Easy-to-Read Display with Backlight
- SPEED: Up to 28 MPH Pedal Assist, 20 MPH Throttle Only
- BATTERY: Removable Internal Lithium-ion 48V, 15Ah (720Wh) with LG M50LT 21700 cells
- REAR RACK: MIK HD
- SENSORS: Torque Sensor
- PEDAL ASSIST: 5 Levels
- CHARGER: 48V 3 Amp Fast Charger, about 5 Hours to a Full Charge
- RANGE: 30 to 60 Miles
- FRAME: 6061 Single-Butted Aluminum Alloy Frame with Internal Battery
- WEIGHT: 74 lbs. (Battery included)
- PEDALS: 9/16' Alloy Platform
- FORK: Suspension Fork with 80mm Travel, Adjustable Preload & Lockout
- WEIGHT LIMIT: 400 lbs.
- KICKSTAND: Included, Aluminum Alloy Kickstand
- CRANKSET: 160mm w/ 52T
- SHIFT: Shimano 7 Speed
- GEAR RATIO RANGE: 11-28T
- BRAKES: Tektro Hydraulic Disc Brakes
- ROTOR: 203 mm
- CHAIN: 130 Link, 8 Speed
- RIM: Double Wall Aluminum Alloy
- SPOKES: Black Stainless 12G Front / 12G Rear
- TUBES: Butyl Rubber
- HUBS: Front Aluminum Alloy Disc Hub
- TIRES: 20" x 4" Puncture Resistant
- SADDLE: AIMA Comfort, 280mm*270mm Saddle
- SEATPOST: Aluminum Alloy, 30.4mm 2-Bolt Clamp
- STEM: Threadless, 31.8mm, 7 Degree Rise, Ext 75mm
- SEAT CLAMP: 34.9 mm Quick Release
- HANDLEBARS: Aluminum Alloy Double Wall, 31.8mm, 680mm
- HEADSET: Sealed Bearing Headset
- GRIPS: Ergonomic Comfort
Geometry and Fit
