Description 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. Technical Specifications MODEL Big Sur Sport MOTOR 750W (Rated), 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 Up 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 BRAKES Tektro E350 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 An e-bike's battery life is influenced by several factors that can affect its maximum range. While our e-bikes can achieve up to 60 miles of range under ideal riding conditions, range figures can drop below 40 or even 30 miles without keeping these factors in mind. Here's a list of the most common factors that affect range, as well as what you can do to maximize your riding time. Pedal Assist: Higher levels of pedal assist will allow for an easier ride, but will also draw more power from the battery. Lower 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 forwards through the air. Slower speeds will extend battery life. Tire Pressure: Fat tire bikes like Big Sur and Big Sur Sport can have their tires aired down beneath the pressure rating listed on the tire for better off-road performance, but this will lead to a increase in rolling resistance, and running too low of a pressure could raise your chances of a tube failure. For most riding situations, pumping up your tires every week or two to the recommended pressure shown on the side of the tire will keep your ride safe and energy-efficient. Load Weight: This includes both the rider's weight and the weight of any cargo you may be carrying. More weight will take 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 terrain with few to no changes in elevation will give you a longer range. Hills and rough terrain can greatly impact your maximum range, especially on higher assist levels. Wind: Wind resistance is generated as you ride through the air, but it can also be generated by, well, the wind! Riding in heavy winds, especially if it's a constant headwind, will lead to a decrease in range. However, if you can catch a tailwind, you may actually be able to steal a bit of range back, as the wind would be traveling in the same direction as you are, effectively cancelling out any wind resistance you would generate on your own. Ambient Temperature: Riding in cold weather will impact the battery's ability to function optimally, sometimes a lot more than you might think. This is a limitation imposed by the chemistry that allows our current battery tech to work. A good rule of thumb is, if you're comfortable (temperature-wise), then the battery is comfortable too. This also goes for storing the battery if you won't be riding for an extended period of time, which leads to: Battery Condition, Care, & Storage: As you use your e-bike's battery, its effective range will diminish over time. This is again a consequence of the Li-ion technology that powers many of