{"product_id":"kingsmith-x21-folding-treadmill","title":"KingSmith X21 Folding Treadmill","description":"\u003cp\u003eA double-folding running treadmill with a larger console, quick speed keys and NFC pairing. Built for regular training rather than occasional walking.\u003c\/p\u003e\u003cdiv style=\"border-left:4px solid #E8542F;padding:4px 0 4px 18px;margin:22px 0;\"\u003e\n\u003cp style=\"font-size:12px;letter-spacing:0.09em;text-transform:uppercase;color:#E8542F;font-weight:700;margin:0 0 10px;\"\u003eWhat it changes\u003c\/p\u003e\n\u003cp style=\"margin:0 0 10px;\"\u003e\u003cstrong\u003eBought once, not billed monthly.\u003c\/strong\u003e A US gym runs $40–70 a month, every month, whether you go or not. This is one payment, and it stays in your home.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 10px;\"\u003e\u003cstrong\u003eThe drive costs more than the fee.\u003c\/strong\u003e Two sessions a week is an hour in traffic and fuel you didn't plan on. Here the commute is the length of a hallway.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 10px;\"\u003e\u003cstrong\u003eYour evenings come back.\u003c\/strong\u003e 6 a.m. or 10 p.m., twelve minutes or fifty. Nothing has to be booked, and nothing closes.\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eBuilt to outlast the payback.\u003c\/strong\u003e Optional protection from Consumer Priority Service picks up after the one-year manufacturer warranty, for up to six years of total coverage.\u003c\/p\u003e\n\u003c\/div\u003e\u003ch3\u003eWhy you'll love it\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eA real training treadmill that still folds away.\u003c\/strong\u003e 1.25 HP, 7.5 mph, an 18.1 in belt, and a double fold that stores it in a closet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed on one key.\u003c\/strong\u003e Quick speed buttons jump straight to your interval pace instead of tapping up one step at a time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTap to pair.\u003c\/strong\u003e NFC on the console connects your phone to the KS Fit app with a touch. Apple Watch supported.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSee your pace from the deck.\u003c\/strong\u003e Enlarged console plus the interactive light strip along the belt.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eMotor\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eBrushless 1.25 HP \/ 918 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eSpeed range\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003e0.6–7.5 mph (1–12 km\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eRunning surface\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003e47.6 × 18.1 in (121 × 46 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eMaximum user weight\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003e243 lb (110 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eProduct weight\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003e82 lb (37 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eShipping weight\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003e93 lb (42 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eFolding\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eDouble fold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eConsole\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eEnlarged display panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eQuick speed adjustment\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eNFC\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eInteractive light\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eArmrest\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eTransport wheels\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eLarge wheels (ø 51 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eDisplay\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eTime, speed, distance, calories, steps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eApp\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eKS Fit (iOS and Android)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eApple Watch\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eOverload protection\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eIncline\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003eNot available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:6px 14px 6px 0;border-bottom:1px solid #e5e5e5;white-space:nowrap;\"\u003eFCC ID\u003c\/th\u003e\n\u003ctd style=\"padding:6px 0;border-bottom:1px solid #e5e5e5;\"\u003e2AR7VC-8082U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp style=\"font-size:0.9em;color:#666;\"\u003eModel TRX21F. Specifications are supplied by the manufacturer and may be updated without notice.\u003c\/p\u003e\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\u003cp style=\"font-size:0.9em;color:#666;\"\u003eTap a question to open the answer.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003e▸ X21 or X25 — which should I get?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eX21: 7.5 mph, 243 lb, 82 lb frame. X25: 9.9 mph, 300 lb, 1.5 HP, 104 lb frame. If you run intervals above an 8-minute mile or weigh over 240 lb, the X25. Otherwise the X21 does the job for less.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003e▸ What do the quick speed keys do?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThey jump straight to preset speeds, so you go from a walk to your run pace in one press. Useful for intervals.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003e▸ What is the NFC for?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eHold your phone to the console and the KS Fit app pairs instantly, no Bluetooth menu. Your sessions then sync to the app, Apple Health and Apple Watch.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003e▸ Can I use it as a walking pad under a desk?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes. Fold the handrail down for walking mode. It's taller than a dedicated pad, so check desk clearance.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003e▸ How big is it when folded?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eThe handrail folds onto the deck and the deck folds in half, so the stored length is roughly half of the 47.6 in belt length. It fits in a closet or behind a door and rolls on large wheels.\u003c\/p\u003e\u003c\/details\u003e\u003ch3\u003eDelivery\u003c\/h3\u003e\u003cp\u003eFree delivery to addresses in the 48 contiguous United States and the District of Columbia. Orders are dispatched within 48 hours of payment from our US warehouse and typically arrive within 2 to 6 working days. Tracking is emailed on dispatch. We do not currently ship to Alaska, Hawaii or Puerto Rico.\u003c\/p\u003e\u003ch3\u003eWarranty and returns\u003c\/h3\u003e\u003cp\u003eEvery X21 comes with a 12-month limited warranty covering the motor, electronic controller, main frame and console. The full terms are in our \u003ca href=\"https:\/\/smartflexora.com\/pages\/warranty-policy\"\u003ewarranty policy\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eReturns are accepted within 30 days of delivery in original packaging. Items delivered between 1 November and 31 December may be returned within 45 days. See our \u003ca href=\"https:\/\/smartflexora.com\/policies\/refund-policy\"\u003erefund policy\u003c\/a\u003e for the full terms.\u003c\/p\u003e\u003ch3\u003eOptional extended protection\u003c\/h3\u003e\u003cp\u003eYou can add an extended protection plan from \u003cstrong\u003eConsumer Priority Service (CPS)\u003c\/strong\u003e, our warranty partner, when you order. It begins where the 12-month manufacturer warranty ends and can take total coverage up to six years.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne single payment — never a monthly rate.\u003c\/strong\u003e You pay once at checkout. There is no subscription, no recurring charge and nothing to cancel later.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% of parts and labor\u003c\/strong\u003e for mechanical and electrical failure, including manufacturing defects and hardware failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHome and commercial use are both covered\u003c\/strong\u003e — the plan is valid whether the treadmill sits in your bedroom or in an office.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIf it cannot be repaired, it gets replaced.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePick your term from the protection plan option shown with this product or in your cart. It is entirely optional, and the 12-month manufacturer warranty applies either way. Accidental damage is not covered by this plan.\u003c\/p\u003e\u003ch3\u003eStill deciding? Compare the range\u003c\/h3\u003e\u003cdiv style=\"border-left:4px solid #E8542F;padding:4px 0 4px 18px;margin:20px 0;\"\u003e\n\u003cp style=\"font-size:12px;letter-spacing:0.09em;text-transform:uppercase;color:#E8542F;font-weight:700;margin:0 0 6px;\"\u003eEasiest to control mid-run — you're on it\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong\u003eKingSmith X21\u003c\/strong\u003e — the training treadmill that still folds into a closet.\u003c\/p\u003e\n\u003cp style=\"margin:0;\"\u003eQuick speed keys and NFC pairing turn an interval session into single presses instead of held buttons and menus. The trade-off: the lowest top speed and weight rating in the X-series.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv style=\"border-top:1px solid #8a8a8a;padding:14px 0;\"\u003e\n\u003cp style=\"font-size:12px;letter-spacing:0.09em;text-transform:uppercase;color:#8a8a8a;margin:0 0 4px;\"\u003eIf you train faster than an eight-minute mile\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong\u003eKingSmith X214\u003c\/strong\u003e — the same double-folding frame with more top-end speed and full side armrests. Best if tempo runs are a regular part of your week. \u003ca href=\"\/products\/kingsmith-x214-folding-treadmill\" style=\"text-decoration:underline;font-weight:600;\"\u003eSee the X214 →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv style=\"border-top:1px solid #8a8a8a;padding:14px 0;\"\u003e\n\u003cp style=\"font-size:12px;letter-spacing:0.09em;text-transform:uppercase;color:#8a8a8a;margin:0 0 4px;\"\u003eIf you're a heavier runner\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong\u003eKingSmith X25\u003c\/strong\u003e — a stronger motor and a higher weight rating, in a frame one person can still roll away. Best if you want the capacity without the flagship's bulk. \u003ca href=\"\/products\/kingsmith-x25-folding-treadmill\" style=\"text-decoration:underline;font-weight:600;\"\u003eSee the X25 →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv style=\"border-top:1px solid #8a8a8a;padding:14px 0;\"\u003e\n\u003cp style=\"font-size:12px;letter-spacing:0.09em;text-transform:uppercase;color:#8a8a8a;margin:0 0 4px;\"\u003eIf storage space is the real constraint\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong\u003eKingSmith MX10\u003c\/strong\u003e — the same double fold on a lighter, slower frame. Best if the machine has to disappear between sessions. \u003ca href=\"\/products\/kingsmith-mx10-folding-treadmill\" style=\"text-decoration:underline;font-weight:600;\"\u003eSee the MX10 →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv style=\"border-top:1px solid #8a8a8a;padding:14px 0;\"\u003e\n\u003cp style=\"font-size:12px;letter-spacing:0.09em;text-transform:uppercase;color:#8a8a8a;margin:0 0 4px;\"\u003eIf you want one machine for the desk and for running\u003c\/p\u003e\n\u003cp style=\"margin:0 0 8px;\"\u003e\u003cstrong\u003eWalkingPad R3 Hybrid+\u003c\/strong\u003e — a wide deck that goes flat for the desk and opens into a treadmill afterwards. Best if you'd otherwise buy a pad and a treadmill. \u003ca href=\"\/products\/walkingpad-r3-hybrid-plus\" style=\"text-decoration:underline;font-weight:600;\"\u003eSee the R3 Hybrid+ →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"KingSmith","offers":[{"title":"Default Title","offer_id":54663257555285,"sku":"TRX21F","price":799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/2940\/3989\/files\/X21-60.jpg?v=1786815622","url":"https:\/\/smartflexora.com\/products\/kingsmith-x21-folding-treadmill","provider":"SmartFlexora LLC","version":"1.0","type":"link"}