{"product_id":"the-cadence-torque-sensing-mid-drive-ebike-kit","title":"The Cadence | Torque-Sensing Mid-Drive E-Bike Conversion Kit","description":"\u003cdiv class=\"product-narrative\"\u003e\n\u003cp\u003eA hub motor pushes the bicycle from behind, which is why it always feels like a stranger riding along. A mid-drive motor works through the chain, through the gears, and through the same drivetrain the rider already trusts. The Tongsheng TSDZ series was built around that idea, and the result is an electric bicycle that still feels like a bicycle. Power arrives when the pedals load, not when a throttle is twisted, so the assist reads as your own legs finding a second wind.\u003c\/p\u003e\n\u003cp\u003eThe torque sensor is the whole argument. It measures how hard you are pushing the cranks and scales the motor output to match, which means a gentle spin at the end of a ride and a hard stand on a climb both produce the response you would expect from your own effort. Zero-start capability adds power from a dead stop without a throttle, so junctions and stop-start traffic stop being a negotiation. The 2025 revision moved the gear positioning for better sealing and a longer service life, and the IPX5 rating keeps the unit working through rain and road spray.\u003c\/p\u003e\n\u003cp\u003eThree power tiers cover most riders and most laws. The 48V 750W version is the workhorse for cargo bikes, long climbs and heavy riders. The 500W option sits in the middle for mixed use. The 36V 250W version is the road-legal specification for the European market, quiet and efficient on flat commutes. Bottom brackets from 68mm to 73mm are supported, disc brakes and V-brakes both work, and the supplied mounting hardware fits the large majority of standard frames without frame modification.\u003c\/p\u003e\n\u003cp\u003eChoose the display that matches how you ride: the SW2-M58 with its clear instrument layout, or the EKD01 with Bluetooth for tuning assist curves from a phone. Brake levers or brake sensors are selected at checkout so the motor cuts cleanly the moment you touch the brakes.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eAssist should feel like a tailwind, never like a tow rope.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin: 24px 0; border: 0; border-top: 1px solid #eaeaea;\"\u003e\n\u003cdiv class=\"product-features\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style: none; padding: 0;\"\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e✦ Torque sensor reads pedal pressure and scales assist in real time for a natural riding feel\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e✦ Zero-start capability delivers power from a complete standstill without a throttle\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e✦ 2025 revision with revised gear positioning for improved sealing and longer service life\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e✦ IPX5 water resistance for reliable operation in rain and road spray\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e✦ Bottom bracket compatibility from 68mm to 73mm, fitting roughly 95 percent of standard bicycle frames\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e✦ Disc brake and V-brake compatible, with a choice of brake lever or brake sensor cut-off\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul style=\"list-style: none; padding: 0;\"\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eMotor Type:\u003c\/strong\u003e Mid-drive, brushless, side-hung design\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eRated Power Options:\u003c\/strong\u003e 48V 750W \/ 36V 250W \/ 500W configuration\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 48V or 36V depending on version\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eSensor:\u003c\/strong\u003e Torque sensor (PAS)\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eBottom Bracket:\u003c\/strong\u003e 68mm to 73mm length, 33.5mm to 36mm diameter\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eChainring:\u003c\/strong\u003e 44T for 750W version, 42T for 250W version\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eDisplay Options:\u003c\/strong\u003e SW2-M58 instrument display or EKD01 with Bluetooth\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eWaterproof Grade:\u003c\/strong\u003e IPX5\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eBrake Compatibility:\u003c\/strong\u003e Disc brake or V-brake, brake lever or brake sensor\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Brushless, side-hung motor\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e CE\u003c\/li\u003e\n\u003cli style=\"padding: 8px 0; border-bottom: 1px solid #f2f2f2;\"\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12 months\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-applications\"\u003e\n\u003ch3\u003eWhere It Belongs\u003c\/h3\u003e\n\u003cp\u003eThis kit is for the rider who has a bicycle worth keeping and does not want to replace it with a scooter. Commuters use the 250W version to flatten a hilly route without turning the bike into a moped. Cargo and touring riders pick the 750W version because torque delivered through the gears multiplies against the load instead of fighting it. Small workshops and rental fleets fit the kit across a mixed stable of frames, since the 68mm to 73mm bottom bracket range and the standard mounting pattern remove the guesswork from the install.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq\"\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv style=\"margin-bottom: 15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit my bicycle frame?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe kit supports bottom brackets from 68mm to 73mm in length and 33.5mm to 36mm in diameter, which covers roughly 95 percent of standard frames. If your frame uses a press-fit or unusually wide bottom bracket, message us with the frame model before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between the 750W, 500W and 250W versions?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 48V 750W version delivers the most torque and suits cargo bikes, heavy riders and long climbs. The 36V 250W version is the road-legal European specification, quieter and more efficient. The 500W option sits between them for general mixed use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the motor work without pedalling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThere is no throttle. Assist is driven by the torque sensor and delivered through the pedals, and the zero-start function supplies power from a standstill so you can set off from a stop without strain. This is what keeps the ride feeling like a bicycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Which display should I choose?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe SW2-M58 gives a clear, glove-friendly instrument layout with speed, assist level, battery state and trip data. The EKD01 adds Bluetooth so you can adjust the assist curve from a phone, which is the better choice if you ride the same route with and without cargo.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the motor behave when I brake?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrder with brake levers or brake sensors and the controller cuts motor output the instant the brake is applied. Both options are available at checkout, and the correct one depends on whether you are replacing your existing levers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the kit waterproof enough for daily commuting?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit carries an IPX5 water resistance rating, so rain and road spray are not a problem. Do not submerge the motor or jet-wash it at close range, and the bearings will last far longer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-gallery\" style=\"margin-top: 30px; text-align: center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S3a65dda0e5e94b24afa4101213ffb5acH.webp?v=1776475103\" alt=\"The Cadence | Torque-Sensing Mid-Drive E-Bike Conversion Kit\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/Sfab8c7fca49e472da15678d52dd7a0d2K.webp?v=1776475103\" alt=\"The Cadence | Torque-Sensing Mid-Drive E-Bike Conversion Kit\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S8ff19e668f344ad3a7613431434af476j.webp?v=1776475103\" alt=\"The Cadence | Torque-Sensing Mid-Drive E-Bike Conversion Kit\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S5150bf5a21764e33a263fe142fd7df54x.webp?v=1776475103\" alt=\"The Cadence | Torque-Sensing Mid-Drive E-Bike Conversion Kit\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S1776d57a419e4bfea7e52c8ba78254bec.webp?v=1776475104\" alt=\"The Cadence | Torque-Sensing Mid-Drive E-Bike Conversion Kit\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S13894d70e6d5492b982d7098b5247546G.webp?v=1776475103\" alt=\"The Cadence | Torque-Sensing Mid-Drive E-Bike Conversion Kit\" style=\"max-width:100%;height:auto;margin:8px 0;border-radius:6px;\"\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\": \"https:\/\/schema.org\", \"@type\": \"Product\", \"name\": \"The Cadence | Torque-Sensing Mid-Drive E-Bike Conversion Kit\", \"brand\": {\"@type\": \"Brand\", \"name\": \"Tongsheng\"}, \"sku\": \"1005007789536907-TSDZ8 48V750W 44T-SW2-M58(New Arrival)-Poland-Brake Lever\", \"image\": [\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/files\/S3a65dda0e5e94b24afa4101213ffb5acH.webp?v=1776475103\"], \"description\": \"A hub motor pushes the bicycle from behind, which is why it always feels like a stranger riding along. 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