{"product_id":"hkm-3921107-fat-tire-e-bike-750w-48v-13ah-20-inch-7-speed","title":"HKM-3921107 Fat Tire E-Bike Runs a 750W Hub on 20 x 4.0 Tires With Seven Speeds and 360 Degree Lights and a Brown Saddle","description":"\u003cdiv class=\"hkm-pdp\"\u003e\n\n\u003cstyle\u003e\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Roboto:wght@400;500;700\u0026display=swap');\n.hkm-pdp{\n  --hkm-ink:#0e0e0e; --hkm-body:#636363; --hkm-muted:#6e6e6e; --hkm-line:#e1e1e1;\n  --hkm-panel:#f0f0f0; --hkm-blue:#0672cb; --hkm-link:#00468b;\n  max-width:1292px; width:100%; min-width:0; margin:0 auto; padding:0 2px;\n  font-family:\"Roboto\",\"Helvetica Neue\",Helvetica,Arial,sans-serif;\n  font-size:16px; line-height:1.7; color:var(--hkm-body); font-weight:400;\n  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility; overflow-wrap:break-word;\n}\n.hkm-pdp *{box-sizing:border-box}\n.hkm-pdp .hkm-eyebrow{\n  font-size:11px; font-weight:400; letter-spacing:.08em; text-transform:uppercase;\n  color:var(--hkm-blue); 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Front and rear shocks, mechanical discs at both ends, a brown saddle and a 360 degree lighting set that puts a wide floodlight up front and a brake-flashing tail lamp behind. It is listed at 25 km\/h and 20 to 37 miles, and it weighs 78.7 lb with a 264 lb load rating. The battery is a lockable canister on the down tube, so it comes off for charging indoors.\u003c\/p\u003e\n\n\u003cp\u003eThe frame is a black loop with an exposed battery canister on the down tube, a brown sprung saddle and a high-rise bar. It is the classic fat-tyre scrambler silhouette: small wheels, a long seat and a headlamp mounted high enough to clear the front tyre. The brown saddle is the one warm colour on an otherwise all-black bike.\u003c\/p\u003e\n\n\u003cp\u003eThe lighting is the feature that separates it. The front unit throws a wide flood rather than a spot, and the rear lamp flashes continuously under braking, which is the difference between being seen at dusk and hoping you are. If a lot of your riding happens after work, that matters more than another 100W of motor.\u003c\/p\u003e\n\n\u003ch2\u003eAt a Glance\u003c\/h2\u003e\n\n\u003cul class=\"hkm-glance\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e750W Rear Hub\u003c\/strong\u003e — 48V system, single motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e48V 13Ah Pack\u003c\/strong\u003e — 624Wh on the down tube\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 to 37 Miles\u003c\/strong\u003e — Listed range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 km\/h\u003c\/strong\u003e — About 15.5 mph, listed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e7-Speed Drivetrain\u003c\/strong\u003e — Derailleur at the rear wheel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFront and Rear Shocks\u003c\/strong\u003e — Sprung fork and twin rear springs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360 Degree Lights\u003c\/strong\u003e — Flood headlamp and brake-flash tail\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 x 4.0 Tires\u003c\/strong\u003e — Pneumatic knobbys on spoked rims\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e78.7 lb\u003c\/strong\u003e — Mid weight for the class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e264 lb Load\u003c\/strong\u003e — 120 kg rating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrown Saddle\u003c\/strong\u003e — Sprung, over the rear wheel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Discs\u003c\/strong\u003e — Front and rear, cable actuated\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrame Saddle and Lights\u003c\/h2\u003e\n\n\u003cp\u003eThe frame is a black loop with a battery canister bolted to the down tube, a brown sprung saddle over the rear wheel and a high-rise bar with a cross brace. The headlamp sits on a bracket above the front tyre rather than on the crown, so it clears the fat casing when the fork compresses.\u003c\/p\u003e\n\n\u003cp\u003eThe wheels are 20 x 4.0 pneumatic knobbys on spoked rims. Twenty inches is the size that keeps a fat bike stable at low pressure without making it a two-person lift, and spokes can be trued at home after a hard knock. Run them at 15 psi on pavement and 8 on sand.\u003c\/p\u003e\n\n\u003cp\u003eSuspension is a sprung fork up front and twin springs under the saddle at the rear, which is enough to take the edge off a curb or a rutted track without adding the weight of a linkage. Brakes are mechanical cable discs at both ends, with a barrel adjuster at the lever for pad wear.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eFrame: black loop, battery canister on the down tube\u003c\/li\u003e\n\u003cli\u003eBattery: 48V 13Ah, lockable\u003c\/li\u003e\n\u003cli\u003eWheels: 20 in spoked, 4.0 pneumatic\u003c\/li\u003e\n\u003cli\u003eFork: sprung\u003c\/li\u003e\n\u003cli\u003eRear: twin springs under the saddle\u003c\/li\u003e\n\u003cli\u003eBrakes: mechanical cable disc\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFitted as shipped: the 360 degree lighting set, front and rear fenders, the brown saddle, a kickstand and the pedals. The bars carry the throttle, the assist switch and the brake levers, and the battery canister has its own lock and charge port on the side.\u003c\/p\u003e\n\n\u003ch2\u003e750W and 624Wh\u003c\/h2\u003e\n\n\u003cp\u003eThe motor is a 48V 750W rear hub driving through a seven-speed derailleur, which is the arrangement that lets you pedal with the motor on a slope instead of letting it do all the work. The listed top speed is 25 km\/h, about 15.5 mph, so this is a bike built for paths and tracks rather than the road.\u003c\/p\u003e\n\n\u003cp\u003eThe pack is 48V 13Ah, 624Wh, in a canister on the down tube. It is the smallest battery in this group, and the listed range is still 20 to 37 miles because the motor is modest. Take the lower number for throttle use and the higher one for pedalling at low assist.\u003c\/p\u003e\n\n\u003cp\u003eA lockable canister is worth having: it means the pack comes off for charging indoors, and it means the bike is not dead if the battery ages. Check that the lock engages fully every time you refit it, because a canister that rattles will wear its contacts.\u003c\/p\u003e\n\n\n\n\u003ch2\u003eWho It Fits and How It Rides\u003c\/h2\u003e\n\n\u003cp\u003eThe saddle is low and sprung, and the bars are high, so it suits riders from about 5 ft 4 in to 6 ft 2 in. The 264 lb rating covers most adults with a pack, and at 78.7 lb the bike is manageable to lift onto a rack. A very tall rider will find the cockpit short.\u003c\/p\u003e\n\n\u003cp\u003eOn gravel and packed dirt it is stable and the twin springs keep the saddle from kicking, and the fat casing rolls over sand. On pavement it is slow by design and the knobbys hum, so it is a path and track bike rather than a commuter. The lighting set is genuinely useful after dark.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003ePaths, gravel and campground loops\u003c\/li\u003e\n\u003cli\u003eDusk and night riding on known routes\u003c\/li\u003e\n\u003cli\u003eA second bike that fits in a shed\u003c\/li\u003e\n\u003cli\u003eNot for traffic or long road rides\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\n\u003cdiv class=\"hkm-tablewrap\"\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBike\u003c\/td\u003e\n\u003ctd\u003eAssembled frame, 750W hub, 48V 13Ah canister\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e48V 13Ah 624Wh, lockable canister\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharger\u003c\/td\u003e\n\u003ctd\u003e48V charger with a US plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTools\u003c\/td\u003e\n\u003ctd\u003eHex keys and a spanner for the axles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKeys\u003c\/td\u003e\n\u003ctd\u003eTwo battery keys\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePedals\u003c\/td\u003e\n\u003ctd\u003ePlatform pair, left side reverse-threaded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFenders\u003c\/td\u003e\n\u003ctd\u003eFront and rear, fitted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLights\u003c\/td\u003e\n\u003ctd\u003eFlood headlamp and brake-flash tail lamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual\u003c\/td\u003e\n\u003ctd\u003eAssembly guide and registration card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStand\u003c\/td\u003e\n\u003ctd\u003eSide stand, frame mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003c\/div\u003e\n\n\u003cp class=\"hkm-note\"\u003eBefore the first ride: fit the front wheel and torque the axle, set the bars square to the fork, check the battery canister locks fully, bed the cable discs in with ten firm stops and charge the pack. Budget 35 to 50 minutes, and check the brake cables after the first ten miles.\u003c\/p\u003e\n\n\u003ch2\u003eColor and Finish\u003c\/h2\u003e\n\n\u003cp\u003eBlack covers the frame, canister, fenders, fork, bars and rims, and the brown saddle is the only colour on the bike. The lighting set adds a white flood up front and a red tail behind, and the frame lettering is a muted grey rather than a bright decal.\u003c\/p\u003e\n\n\u003cp\u003eTouch-up paint in satin black is available on request. The wear points are the canister where a boot rubs it, the saddle edges and the fork lowers.\u003c\/p\u003e\n\n\u003ch2\u003eBattery Care and Maintenance\u003c\/h2\u003e\n\n\u003cp\u003eBecause the pack comes off, the routine is simple: charge it indoors between 20 and 90 percent for daily use, take it to full once a month, and keep it above freezing while charging. Store it around half charge if the bike will sit for a month, and refit it with the lock fully engaged.\u003c\/p\u003e\n\n\u003cp\u003eCheck tire pressure before every ride at 15 psi on pavement and 8 on gravel, check the spokes and axle nuts after the first 50 miles, and check the canister contacts for corrosion if you ride in the rain. The cable discs need the barrel adjuster turned as the pads wear, and the pads are a five-minute swap.\u003c\/p\u003e\n\n\n\n\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\n\u003cdiv class=\"hkm-tablewrap\"\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eHKM-3921107\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eFat tire electric bike\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e48V 750W brushless rear hub\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop speed\u003c\/td\u003e\n\u003ctd\u003e25 km\/h, about 15.5 mph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e48V 13Ah lithium, lockable canister\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery capacity\u003c\/td\u003e\n\u003ctd\u003e624Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003e20 to 37 miles, listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrivetrain\u003c\/td\u003e\n\u003ctd\u003e7-speed derailleur\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrakes\u003c\/td\u003e\n\u003ctd\u003eMechanical cable disc, front and rear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFork\u003c\/td\u003e\n\u003ctd\u003eSprung\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear suspension\u003c\/td\u003e\n\u003ctd\u003eTwin springs under the saddle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTires\u003c\/td\u003e\n\u003ctd\u003e20 x 4.0 pneumatic knobby\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWheels\u003c\/td\u003e\n\u003ctd\u003eSpoked, 20 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame\u003c\/td\u003e\n\u003ctd\u003eBlack loop with a down tube canister\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat\u003c\/td\u003e\n\u003ctd\u003eBrown sprung saddle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e78.7 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad capacity\u003c\/td\u003e\n\u003ctd\u003e264 lb, 120 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLighting\u003c\/td\u003e\n\u003ctd\u003eFlood headlamp and brake-flash tail lamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFenders\u003c\/td\u003e\n\u003ctd\u003eFront and rear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePedals\u003c\/td\u003e\n\u003ctd\u003ePlatform pair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStand\u003c\/td\u003e\n\u003ctd\u003eSide stand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack with a brown saddle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003eFront wheel, canister lock, charge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse case\u003c\/td\u003e\n\u003ctd\u003ePaths, gravel, dusk riding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eUL listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdiv class=\"hkm-q\"\u003e\n\u003ch3\u003eHow fast does it go?\u003c\/h3\u003e\n\u003cp\u003e25 km\/h, about 15.5 mph, which is the listed figure. That is deliberately modest: it is a path and track bike rather than a road one, and the seven speeds let you add leg power where the motor runs out. Check your local limit before riding it on a shared path.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hkm-q\"\u003e\n\u003ch3\u003eHow far does it go on a charge?\u003c\/h3\u003e\n\u003cp\u003e20 to 37 miles from the 624Wh canister. 37 assumes pedalling at low assist on flat ground; 20 is a realistic figure with the throttle open. Because the canister locks and lifts off, you can charge it indoors rather than parking the bike next to an outlet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hkm-q\"\u003e\n\u003ch3\u003eHow good are the lights?\u003c\/h3\u003e\n\u003cp\u003eBetter than most bikes in this class. The front unit throws a wide flood rather than a narrow spot, and the rear lamp flashes continuously under braking. If a lot of your riding happens after work, that is worth more than another 100W of motor.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hkm-q\"\u003e\n\u003ch3\u003eIs the battery removable?\u003c\/h3\u003e\n\u003cp\u003eYes. It is a 48V 13Ah 624Wh canister on the down tube with its own lock and charge port. It comes off for charging indoors, which also means the bike is not dead when the pack eventually ages. Make sure the lock engages fully when you refit it.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hkm-q\"\u003e\n\u003ch3\u003eWho is it sized for?\u003c\/h3\u003e\n\u003cp\u003eRiders from about 5 ft 4 in to 6 ft 2 in, on a low sprung saddle with high bars. The load rating is 264 lb, and at 78.7 lb the bike is manageable to lift onto a rack. A very tall rider will find the cockpit short.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hkm-q\"\u003e\n\u003ch3\u003eWhat does assembly involve?\u003c\/h3\u003e\n\u003cp\u003eFit the front wheel and torque the axle, set the bars square to the fork, check the canister locks fully, bed the cable discs in with ten firm stops and charge the pack. Budget 35 to 50 minutes, then check the brake cables after ten miles.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eService and Policies\u003c\/h2\u003e\n\n\u003cp\u003eCoverage that lasts beyond the box. Orders ship free with a tracking number in 2 to 5 business days. From delivery, the product is protected for 180 days against manufacturing defects and transit damage, returnable within 30 days for a full refund, and covered by a 24-month parts-and-labor warranty on manufacturing defects. Four policies, one idea: ship it free, protect it for 180 days, take it back for 30, and stand behind it for two years.\u003c\/p\u003e\n\n\u003cdiv class=\"hkm-policy-grid\"\u003e\n\u003cdiv class=\"hkm-policy-card\"\u003e\n\u003ch3\u003eFree Shipping on All Orders\u003c\/h3\u003e\n\u003cp\u003eEvery order ships free. Handling Time: 0-1 business days (Monday to Friday). Transit Time: 2-5 business days (Monday to Friday). A tracking number is emailed as soon as the parcel leaves our warehouse.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hkm-policy-card\"\u003e\n\u003ch3\u003e180 Days Purchase Protection\u003c\/h3\u003e\n\u003cp\u003eYour purchase is protected for 180 days from the delivery date against manufacturing defects and damage in transit. If something arrives wrong, we make it right.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hkm-policy-card\"\u003e\n\u003ch3\u003e30 Days Money-Back Guarantee\u003c\/h3\u003e\n\u003cp\u003eNot completely satisfied? Request a return within 30 days of delivery for a full refund. We keep the process simple and hassle-free.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hkm-policy-card\"\u003e\n\u003ch3\u003e24 Months Warranty Service\u003c\/h3\u003e\n\u003cp\u003eThe product is covered by a 24-month warranty from the delivery date against manufacturing defects. Coverage includes parts and labor; normal-wear items are excluded.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cp class=\"hkm-close\"\u003eHKM-3921107 · fat tire electric bike · 48V 750W rear hub with a 7-speed derailleur · 48V 13Ah 624Wh lockable canister on the down tube · 20 to 37 miles listed range · 25 km\/h top speed, about 15.5 mph · mechanical cable disc brakes front and rear · sprung fork with twin springs under the saddle · 20 x 4.0 pneumatic knobby tires on spoked rims · 360 degree lighting with a flood headlamp and a brake-flash tail lamp · brown sprung saddle, fenders and a side stand · 78.7 lb with a 264 lb load rating · charger in the box · UL listed · built for paths, gravel and dusk riding rather than traffic · lockable canister so the pack charges indoors · the tail lamp flashes under braking so traffic behind you sees it\u003c\/p\u003e\n\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"Product\", \"name\": \"HKM-3921107 Fat Tire E-Bike Runs a 750W Hub on 20 x 4.0 Tires With Seven Speeds and 360 Degree Lights and a Brown Saddle\", \"sku\": \"HKM-3921107\", \"mpn\": \"Hekomart-HKM-3921107\", \"brand\": {\"@type\": \"Brand\", \"name\": \"Hekomart\"}, \"description\": \"A 20-inch fat bike with a 750W hub, a 48V 13Ah pack worth 624Wh in the frame and seven speeds. 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