Lifespan Fitness SM-420 Spin Bike with Automatic Magnetic Resistance

Studio-Grade Performance at Home — The Lifespan Fitness SM-420 Spin Bike

The SM-420 is where serious home cycling begins. A 12kg commercial-grade TrueSpin flywheel, 3-piece forged steel crank, and 16 levels of smooth magnetic resistance combine to deliver a ride that feels every bit as good as a studio bike. Built-in hand pulse sensors keep you in your target heart rate zone, while Bluetooth connectivity with Zwift, Kinomap, and FitLink opens up a world of virtual training. Add a device holder, drink bottle holder, and a 5-year frame warranty, and the SM-420 is the complete package for riders who are serious about their training.

📱 Bluetooth App Connectivity

The SM-420 connects via Bluetooth to the following platforms:

• Zwift — the world's most popular virtual cycling platform. Race and ride in immersive 3D worlds, join group rides, and compete in structured training plans. Your effort on the SM-420 directly controls your avatar's speed in-game.
• Kinomap — stream real-world video routes from thousands of locations worldwide. Resistance adjusts automatically to match the gradient of the route you're riding, delivering an authentic outdoor cycling experience indoors.
• FitLink — track your workouts, monitor performance metrics, and log training history to keep your fitness progress on record.

🔥 Key Features

• 12kg Commercial-Grade TrueSpin Flywheel — balance-tested for a smooth, vibration-free ride at any intensity
• 16-Level Automatic Magnetic Resistance — seamless transitions between intensity levels, simulating real road conditions
• 3-Piece Forged Steel Crank — built for high-intensity, repeated use
• Belt Drivetrain — whisper-quiet and maintenance-free
• Bluetooth Connectivity — pairs with Zwift, Kinomap & FitLink
• In-built Hand Pulse Sensors — real-time heart rate monitoring on the handlebars
• Device Holder — keep your phone or tablet in view during training
• Drink Bottle Holder — stay hydrated without interrupting your session
• Adjustable Handlebar — height range 88–121.8cm from floor
• PU Leather Racing Seat — adjustable up/down and forwards/backwards, height range 82–106.5cm
• Aluminium Alloy Pedals with Toe Clips — lightweight and secure
• Transport Wheels & Floor Levellers — easy to move and stable on any surface
• 5-Year Frame Warranty — class-leading coverage for total peace of mind

📐 Specifications

🚚 Shipping & Delivery

Free shipping to most Australian suburbs. Remote and regional areas may incur additional freight charges. Contact us before ordering if you're unsure about your location.

✅ Why Buy from GymCentral?

• Australian owned and operated — we know fitness equipment and the Australian market
• Fast dispatch — most orders processed within 1–2 business days
• Dedicated support — real people to help with assembly questions, warranty claims, and after-sales care
• Secure checkout — shop with confidence via Shopify's encrypted platform
• 5-year frame warranty + 12-month parts — backed by the manufacturer