Wattbike Nucleus

Wattbike Nucleus

  • Chat to us on 028 9045 4123

Please note: The lead time for this product is approx. 15 days. To keep track of when your item is ready to ship, please check the online order tracker.

The Wattbike Nucleus features our high-definition Performance Touchscreen, delivering the most advanced performance feedback for a fully connected user experience.
The standard resistance option of the Wattbike Nucleus has been engineered to better fit the needs of all health and fitness users.

The touchscreen elevates the cycling experience by delivering incredibly accurate performance feedback. It includes workouts, tests, and Wattbike’s brand new interval builder.

Our unique technology replicates the resistance and sensation of riding on the road, delivering the most authentic ride feel available. That means all of the effort you put in indoors easily translates out onto the road.

With the Wattbike Nucleus you can rely on our data. The Nucleus delivers ±2% accuracy across the max power range of 2000w.

Pedalling Effectiveness Score is a unique technique analysis tool. Building on the industry defining Polar View, PES provides riders with a colour coded display and numerical score. Previously only available via smartphone and tablet on the Hub app, you can now find it right in the touchscreen of the Wattbike Nucleus.

Visualise how you apply force through each pedal stroke and optimise your technique with our patented analysis tool. Training with Polar View helps improve your pedalling efficiency and power output.

We aim to dispatch and deliver all in stock items within 2-10 working days depending on your location in the UK & Ireland.


We ship our orders via Parcel / 2 Man Delivery or Pallet depending on the size of your order and shipping fees will be calculated at checkout. To track your order click here for orders placed online; Track an Online Order and here for orders placed via our Sales team; Track an Offline Order


All deliveries are kerbside, it will be your responsibility to remove the items from the pallet on arrival and dispose of the pallet. You will receive an email from our Logistics team with a date of delivery. If you require an alternative delivery date or if there are any access restrictions to your property, please let us know within 24 hours before delivery by emailing team@blkboxfitness.com. Please be aware failure to do so may result in additional delivery charges.


Some of our training equipment is manufactured here in our HQ. The lead times on these products range from 25-35 working days and are identified by having the MADE IN BELFAST badge.


We understand at times due to size, colour or type some items might not be the right fit for you. We are happy to accept a returned item within 30 days from the date of you receiving the item for a refund or exchange.

To start a return click here; BLK BOX Returns

  • Model: Nucleus
  • Height: 1300mm
  • Frame Width: 660mm
  • Frame Length: 1250mm
  • Footprint: 1450mm x 660mm
  • Weight: 58kg
  • Frame: Steel
  • Seat and Handlebar Stems: 45mm square x 3mm thick stainless steel
  • Covers: Heavy-duty ABS plastic construction
  • Feet: Rubber height adjustable
  • Gears: 1-10 (air), 1-7 (magnetic)
  • Cranks: 170mm
  • Seat: Racing seat fitted as standard
  • Chain: Industrial 1⁄2" x 1⁄8" steel
  • Belt: Automotive industry rubber, kevlar reinforced belt
  • Handlebar Height Adjustability: Range 510mm - 710mm
  • Handlebar Fore/Aft Adjustability: Range 0 - 70mm
  • Seat Height Adjustability: Range 540mm - 800mm
  • Seat Fore/Aft Adjustability: Range 0 - 90mm
  • Accuracy: ±2%
  • Power Range: 2000W
  • Resistance: Air and magnetic
  • Third-Party Connectivity: ANT+, Bluetooth, FTMS
  • Third-Party App Smart Functionality Control: No
  • Gradient: N/A
  • Q Factor: 173mm
  • Max. Rider Weight: 150kg
  • Rider Height: 5′1" - 6′4″ (155cm - 193cm) with standard stems
  • External Power Required: Yes

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Buy more of the products you like and claim free shipping on orders over £500.

Over £150 for apparel and footwear products (T&Cs Apply).


If you change your mind, you can return unused items, original packaging and
tags within 30 days. If the product's colour or size isn't right, you can swap them for the preferred option.

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