Picture of FLEX 12ft Trampoline
FREE JUMPSLIDE
jumpflex FLEX trampoline ladder
Picture of FLEX 12ft Trampoline
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mum and daughter playing on jumpflex trampoline

FLEX 12ft Trampoline

4.8 out of 5 star rating
4.8 star rating1,452 reviews
FREE JUMPSLIDE

FREE JUMPSLIDE

FREE JUMPSLIDE™ worth £149.95 with every trampoline purchase + discounted delivery*! Ends Sunday.
Clearpay
Estimated Delivery

3–5 business day delivery

Warranty

5 year warranty

The FLEX™ 12 ft Trampoline is an excellent all-rounder for jumpers of all ages. Featuring a 4m diameter and a 3.2m jumping mat, it fits well in medium-sized yards. With a robust construction that supports up to 150kg, this model is perfect for young families. Its versatile design and strong build make it a perfect 12 ft trampoline for versatile fun in the United Kingdom, combining safety, great value and enjoyment for everyone.

Ladder included (valued at £39)

Real Reviews From Real Customers

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4.8 out of 5 star rating
4.8 star rating15,598 reviews
Andrew L. Verified Buyer6 January 2026
5.0 out of 5 star rating
1 reviews
Excellently constructed trampoline! The frame was much heavier gague steel than the SuperTramp we were replacing. Easy to put together and clear instructions. Last but not least, the customer service ...
Andrew L. Verified Buyer6 January 2026
5.0 out of 5 star rating
1 reviews
Excellently constructed trampoline! The frame was much heavier gague steel than the SuperTramp we were replacing. Easy to put together and clear instructions. Last but not least, the customer service ...
Christine W. Verified Buyer6 January 2026
5.0 out of 5 star rating
1 reviews
Good service and fast shipping
Christine W. Verified Buyer6 January 2026
5.0 out of 5 star rating
1 reviews
Great trampoline the ids love it 👍
Shannon S. Verified Buyer5 January 2026
5.0 out of 5 star rating
1 reviews
Great value for money , good quality and looks great. Also easy to put together. And it got delivered very quickly.
Tracy C. Verified Buyer4 January 2026
5.0 out of 5 star rating
1 reviews
Delivered on time. Driver very helpful. Easy assembly. Exceptional quality.
Tracy C. Verified Buyer4 January 2026
5.0 out of 5 star rating
1 reviews
100% 5 star review. Delivered on time. Easy assembly, even in the dark with a head torch. Quality is superb.
Michael C. Verified Buyer2 January 2026
5.0 out of 5 star rating
1 reviews
I bought the 10 foot Jumpflex trampoline for my two grandchildren aged 7 and 11. After reading reviews of other companies trampolines I decided to go for the Jumpflex and so glad I did. At first it wa...
Martin H. Verified Buyer31 December 2025
5.0 out of 5 star rating
1 reviews
Great product very easy assembly all push fit clips. Very fast delivery.
Chris 30 December 2025
5.0 out of 5 star rating
1 reviews
We upgraded to a Hero trampoline because my oldest son used his older one to regulate so much he wore it out! The JumpFlex one is miles better, much more robust and should keep him going until he gets...
Kathy K. Verified Buyer29 December 2025
5.0 out of 5 star rating
1 reviews
Amazing trampoline well Worth the money
Melanie S. Verified Buyer29 December 2025
5.0 out of 5 star rating
1 reviews
We bought the 14ft trampoline for our grandson for Christmas. Excellent quality and easy to put together if you’re practical. The DHL courrier service was diabolical but the Jumpflex Customer Service ...

The perfect starter

The trampoline for a growing family

flex trampoline range 8ft 10ft
flex logo white

Our FLEX™ 12 ft trampoline has been built with young families in mind, delivering a great bouncing experience + full safety features + a great low price! Choose Jumpflex® and play for life!

jumpflex flex trampoline in garden
trampoline pole clearance

More space between you and the poles

200% more clearance dramatically softens any pole contact

With our unique patented design, the poles curve away from the trampoline, so you can go crazy! Flip, spin, twirl and do all the stuff that makes bouncing so much fun, with less risk.

jumpflex anti-rust frame treatment video

Built to last

Protection from Mother Nature

As well as looking great in your backyard, Jumpflex™ 12 ft trampolines are designed to stand the test of time. Jumpflex™ metal components undergo a 6-layer rust-proofing and durability process.

All metal components are galvanised inside and out with a hard-wearing zinc coating. Visible sections are finished with a UV-resistant black powder coating. This ensures Jumpflex™ trampolines will remain a property feature you'll be proud of.

kids bouncing

150 kg total weight rating

Built for a growing family

Well-built trampolines equal bigger, smoother bouncing for your family. Good thing our new Jumpflex® FLEX™ 12 ft trampoline features our zero-bolt, zero-weld approach, that not only looks fantastic, but also improves frame strength and stability. This trampoline easily caters for a young family, handling up to a 150 kg load!

Total weight rating
150 kg
Max individual user weight
100 kg
trampoline safety testing astm

Designed for safety

Built to last

We’ve made our 12 ft FLEX™ trampolines with safety in mind! Built to global safety certification standards: ASTM & CE, Jumpflex® trampolines are recognised as the ultimate in trampoline design.

360-degree protection

SafeSeal™ technology

360 degree trampoline safety net

Our 12 ft trampolines feature a 360-degree net safety enclosure to prevent the chance of accidents. Jumpflex® nets securely clip down to the jumping mat all the way around the trampoline. This unique SafeSeal™ system ensures that there is no possibility for kids to fall out once the trampoline door is zipped shut.

top of trampoline net flex
trampoline safety net

A tight weave nylon safety net that’ll last

TightWeave™ technology

Our 12 ft trampolines are built to last, with nets made from 100% high-strength nylon and woven using the TightWeave™ system. A protective UV additive protects the nets against sun damage, allowing your new 12 ft trampoline to weather all seasons.

Grade 6 Intertek UV Testing
6
More durable than standard nets
250%
trampoline parts

World's first weld-free, bolt-free trampoline

Patented FrameFusion™ technology

Our 2024 model’s patented eco-friendly design has zero-bolts and no welds, meaning it takes half the assembly time of traditional trampolines.

FrameFusion™

T E C H N O L O G Y

fusion frame

Whatsmore, the way our engineers have designed the trampoline, means that less nasties are required in the manufacturing process, which makes our trampolines the most eco-friendly around, removing pollutants that can impact our trampoline builders and the environment.

5 Year Warranty

Play for life

Jumpflex® currently offers an awesome 5 year warranty on the FLEX™ frame, so years of carefree bouncing are guaranteed. We also have an excellent customer support team to assist you with any questions or concerns about your new 12 ft trampoline. So choose Jumpflex® and play for life!

jumpflex colourful balls

Dimensions / Specs

Image showing dimensions for the FLEX 12ft Trampoline
Yard space
3.5 m diameter at widest point. 1 m recommended free space around the trampoline.
Jumping mat diameter
2.6 m
Number of springs
60
Spring length
140 mm
Total weight rating
150 kg
Frame tube diameter
38 mm
Floor to mat height
70 cm
Net height
1.8 m
Total trampoline height
2.5 m
Box dimensions
  • Box 1 - 20.8 kg
    L: 103 cm, W: 38 cm, H: 21 cm
  • Box 2 - 20 kg
    L: 100 cm, W: 28 cm, H: 17 cm
  • Box 3 - 20.9 kg
    L: 103 cm, W: 45 cm, H: 18 cm

Bring The Fun With Accessories!

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PROJAM™

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FLEXBOARD™

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SCOOTER

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