40kg Adjustable Dumbbell Pair 4kg Increments
- Up to 40KGPer Dumbbell
- 9 Weight Settings4-5kg Increments
- Twist DialChange In Seconds
- Space SavingCompact Design
- 9-in-1 adjustable weights - 4-5kg increments from 5kg to 40kg
- Quick twist-dial switching - simple one-motion adjustment
- Compact space-saving design - replaces 9 traditional dumbbells
- Comfortable and durable build - ergonomic grip suits all hand sizes
- 12-month
warranty - 30-day
returns - UK-based
support - 50,000+
athletes
Overview
40kg Adjustable Dumbbells with 4kg Increments Space-Saving Strength Training Solution
Maximize your workout efficiency with the MuscleIQ 40kg Adjustable Dumbbells featuring smart 4kg and 5kg increment adjustments - perfect for progressive strength training and space-conscious home gyms. This 9-in-1 adjustable system delivers weights from 5kg to 40kg, replacing 9 traditional dumbbell pairs while maintaining professional gym performance in a compact design.
The quick twist-dial mechanism enables seamless weight transitions between exercises, keeping your workout intensity high and rest periods short. Engineered with ergonomic non-slip handles and durable steel construction, these versatile dumbbells are ideal for strength training, muscle building, HIIT workouts, and full-body conditioning programs.
Fast dispatch from our UK warehouse.
Each product rigorously tested before dispatch.
Free UK shipping on all orders.
Friendly UK customer service team.
Features that
Perform
01
Quick Transitions
Switch weights with a quick turn of the handle, with no plates to change or parts to rebuild. Ideal for drop sets, supersets and fast circuits, so you keep your pace and focus on performance.
02
9 in 1
With an adjustable range from 5kg to 40kg, this system replaces a full rack of dumbbells, saving space and money. Whether your goal is strength, endurance or muscle growth, it adjusts easily to suit any workout and level.
03
Lock-and-go safety mechanism
Once lifted from the base, the plates lock securely in place, with no loose parts during use and better safety for high intensity training.
Range
Replaces multiple weights
- 5kg
- 10kg
- 14kg
- 18kg
- 23kg
- 27kg
- 32kg
- 36kg
- 40kg
Training
How to use
Train your full body with these adjustable dumbbells using simple, effective movements:
- Biceps: Bicep curls to build arm strength and improve grip control.
- Shoulders: Lateral raises to isolate the side delts for wider, more defined shoulders.
- Chest: Chest press to develop upper-body pushing strength and muscle.
- Triceps: Overhead tricep extensions to target the back of the arms and support stronger presses.
- Legs: Goblet squats to build quads and glutes while keeping your torso upright and stable.
- Back & core: Renegade rows to train the upper back while challenging core stability and control.
Included
What's in the box
- 2×40kg Adjustable Dumbbells
- 2×Storage Trays
- 1×User Instructions
| Product Type | Adjustable Dumbbells Pair |
|---|---|
| Brand | Muscleiq |
| Maximum Weight | 40kg Per Dumbbell |
| Total Weight | 80kg Pair |
| Weight Range | 5kg to 40kg |
| Weight Settings | 9 Adjustable Settings |
| Increment | 4-5kg |
| Adjustment System | Twist-Dial Mechanism |
| Handle Type | Ergonomic Non-Slip Grip |
| Storage | Nesting Base |
| Assembly Required | No |
| Warranty | 1 Year Warranty Included |
| Delivery | Free UK Delivery |
Key features
| Quick Adjust | Seamless adjustment by twist of handle |
| Knurled Grip Handle | Enhanced grip and control |
Sizes
Dimensions
| Length | 43.5cm |
|---|---|
| Width | 19.5cm |
| Height | 19.5cm |
| Weight Per Dumbbell | Up To 40kg |
| Total Pair Weight | 80kg |
| Plates Material | Cast Iron |
| Base Material | Stainless Steel + Nylon |
| Handle Material | Aluminium Alloy |
Build
Material and build quality
Built with high quality steel for long-lasting performance under heavy use.
Comfortable handle reduces wrist strain and improves control through every lift.
Nesting mechanism keeps selected weight plates firmly in place during use.
Compare
Why Choose MuscleIQ Adjustable Dumbbells?
| Feature | Muscle IQ | 40kg Adjustable Pair 4kg |
|---|---|---|
| Adjustable Weight | Yes | No |
| Space Saving | Yes | No |
| Quick Adjustment | Yes | No |
| Heavy Load | Yes | Varies |
| Value For Money | ★★★★★ | ★★★★★ |
Who it's for
Ideal for
- Strength Training
- Heavy Lifting
- Muscle Building
- Home Workouts
- Progressive Overload
- Circuit Training
Benefits
Why choose this product?
Enjoy smooth weight changes that let you move between loads quickly, keeping your sets and supersets uninterrupted. Built for progression, it’s ideal for progressive overload, drop sets and fast-paced circuit training. Suitable for every level, it helps beginners learn proper form while giving experienced lifters the flexibility to push intensity. Its space-saving design also eliminates the need for multiple racks, while the clean, modern finish delivers a professional-grade look.
Change weight in seconds with a simple dial twist.
Replaces 9 dumbbells per hand saving valuable floor space.
Robust mechanism keeps your selected weight safe during every rep.
Professional performance in a compact home-friendly design.
Reviews
Reviews
5.0
FAQs
Questions, answered
Can't see your question? Email support@muscleiq.co.uk or call +44 7365 727908.
What weight increments does this dumbbell have? +
How do I change the weight? +
Is this suitable for beginners? +
What is the warranty? +
Do these come with storage trays? +
Good to know
Delivery and returns
Orders placed by 1pm on working days are dispatched the same day. Delivery is free to all UK addresses, including Northern Ireland, the Highlands and the islands. Most UK mainland orders arrive the next working day; some remote postcodes take longer.
Changed your mind? You can return items within 30 days of delivery. A 10% restocking fee applies. See our shipping policy and refund policy.
Free guides & tools
Plan it right
Will a rack fit my room?
Enter your ceiling and rack height.You gete.g. 27cm clearance, pull-ups OKRack calculator
How much flooring do I need?
Enter your room size.You gete.g. 14 tiles for a 4 × 3m roomFlooring calculator
What weight should I start with?
Pick your level, goal and exercise.You gete.g. 6–12kg per dumbbellWeight guide
Planning a full gym?
Pick a rack, attachments and a bench.You getYour full setup and priceGym builder