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Talk to a exercise bike specialist| Resistance | 32 levels, electronic |
| Flywheel | 12 kg |
| Workout Programs | 17 (12 Preset, Manual, HRC, Body Fat, Watts, User) |
| Max User Weight | 150 kg |
| Warranty | Lifetime on frame, 12 months on parts |
If you want low-impact cardio with a step-through frame you can get on and off easily, the York RB420 gives you 32 electronic resistance levels and a 12 kg flywheel for a smooth, steady pedal stroke. The padded seat adjusts to fit you and the frame handles users up to 150 kg.
It suits anyone building a seated home cardio habit around real life: 17 workout programs, a blue backlight LCD tracking time, distance, calories and RPM, plus a tablet holder so you can read or watch while you ride. Transport wheels and adjustable stabilisers mean it sits level and moves when you need the floor space back.
What stands out on the RB420 is the 12 kg flywheel, which keeps the pedal stroke smooth and steady through longer sessions on this step-through frame.
The hand pulse sensors are fine for a rough reading but not zone-accurate. The 32 electronic resistance levels are the real draw, giving you room to progress as your legs strengthen.
Adela Ledvinkova · Bachelor of Exercise & Sport Science · Our In-House Fitness Coach
The electronic resistance gives you 32 steps to work through, so you can start light and add load as your fitness builds.
A 12 kg flywheel keeps the pedal stroke smooth across the range, with no jerky dead spots as you push through each rotation.
What this means for you: You get fine control over intensity, so the same bike suits an easy recovery spin and a harder interval session.
The step-through frame means you swing a leg across a low gap rather than climbing over a high bar, which makes getting on and off easier day to day.
The seat slides fore and aft to suit your leg length, and the back pad adjusts in angle, so you can set a riding position that stays comfortable through a longer session.
What this means for you: If getting on a standard upright bike feels awkward, the low step-through and supported seat make daily use far less of a chore.
You get 17 programs in total: 12 preset routines plus manual, heart rate control, body fat, watts and a user-defined mode.
The heart rate control mode adjusts resistance to hold you in a target range, while watts mode lets you train to a set power number.
What this means for you: The variety keeps sessions from going stale and gives you structured ways to train rather than just pedalling at random.
The backlit LCD measures 131 x 67 mm, so your numbers stay readable without squinting or leaning in.
It tracks time, distance, calories, pulse, recovery, RPM and speed, giving you a clear picture of each session at a glance.
What this means for you: The backlight keeps the screen legible in a dim garage or spare room, and the tablet holder means a show can carry you through a longer ride.
The frame supports users up to 150 kg and carries a lifetime warranty, backed by 12 months on parts.
A 3 piece crank system and adjustable stabilisers keep the bike steady, even on floors that are not perfectly level.
What this means for you: The lifetime frame cover and 150 kg rating tell you this is built to stay put and hold up to regular use.
Transportation wheels let you tilt and roll the bike rather than lift its full 50 kg every time you move it.
That makes it practical to wheel it out for a session and tuck it back against a wall when you are done.
What this means for you: If the bike lives in a shared room, you can shift it out of the way between sessions without wrestling the full weight.
The manual sets the build out in 7 stages: stabilisers and pedals, handlebar post, handlebars, then the seat slider, saddle, side handles, back pad and console. A screwdriver, Allen key and box spanner are included, along with the bolts and fixings.
What this means for you: At 50 kg, the main frame is a lot to lift alone, so have a second person help get it out of the carton.
| Resistance Type | 32 levels, electronic |
| Flywheel | 12 kg |
| Max User Weight | 150 kg |
| Seat Adjustment | Adjustable, padded |
| Console / Display | 131 x 67 mm blue backlight LCD |
| Programs | 17 (12 Preset, Manual, HRC, Body Fat, Watts, User) |
| Assembled Dimensions | 162 cm (L) x 63 cm (W) x 125 cm (H) |
| Product Weight | 50 kg |
| Warranty | Lifetime on frame, 12 months on parts |
| Frame | Step-through design |
| Crank System | 3 piece |
| Workout Feedback | Time, distance, calories, pulse, recovery, RPM, speed |
| Heart Rate Monitoring | Hand pulse sensors |
| Extras | Tablet holder |
| Stabilisers | Adjustable for uneven surfaces |
| Portability | Transportation wheels |
| Product Weight (Gross) | 54 kg |
Effort: 7 assembly stages in the manual; the bike weighs 50 kg, so a second person helps with unpacking. Tools: a screwdriver, Allen key and box spanner, all included (bolts and fixings are included).
The 12 kg flywheel and electronic resistance give a smooth, steady pedal stroke without a fan, so the loudest thing you'll usually hear is the flywheel turning. Most people can ride it with the TV on at normal volume.
The step-through frame and padded seat with back pad make this a good fit if you want comfortable, low-impact cardio in a supported seated position. It suits beginners through to regular riders, holds users up to 150 kg, and the 32 resistance levels give you room to progress. In my experience it's a favourite with people easing back into training.
The hand pulse sensors in the side handles give you a ballpark reading, which is fine for casual sessions and keeping an eye on effort. If you want accurate heart-rate zones for steady aerobic work, wear a chest strap with your own watch or app. The grips are handy, not precise.
Assembled, it's 162 cm long, 63 cm wide and 125 cm tall, so plan for a longer footprint than an upright bike because you sit back with your legs out in front. The 125 cm height clears any standard ceiling easily. Built-in transport wheels let you tilt and roll it aside between sessions.
It ships boxed through our freight network of over 190 depots Australia-wide. Inspect it on delivery, and if anything's damaged or missing, take photos before unpacking further and email support@cardioonline.com.au within 48 hours. We lodge the freight claim and organise replacement parts or a new unit. You never deal with the courier or manufacturer directly.
The manual sets it out in 7 stages, and the screwdriver, Allen key and box spanner come in the box with all the bolts and fixings. The bike weighs 50 kg, so have a second person help lift the frame out of the carton. Keep the manual handy and work on a clear, flat space so the frame and seat line up cleanly as you go.
You get a lifetime warranty on the frame and 12 months on parts, handled locally through our Australian team. The lifetime frame cover tells you York expects this chassis to outlast years of regular riding. If a part needs sorting within the first year, contact us and we'll take care of it.
If this product page shows the 100 Day Money Back Guarantee badge, you have 100 days from purchase to return it. It needs to be as-new, disassembled and repacked in the original packaging with all parts. We refund the product price and the original delivery fee, with no restocking fee. We book the return freight; you cover that cost.
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Try it for 100 days. Return it if it is not right.
If your equipment is not right for your space or your training once you have lived with it, you can request a return within 100 days of purchase for a refund of the product price.
Available on products showing the 100 Day Money Back Guarantee badge. Return shipping is paid by the customer unless otherwise agreed. Original delivery, installation and service fees are non-refundable. See the full policy: /pages/risk-free-returns
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