Zero Gravity Ultima 4 trampoline review (10ft)

Zero Gravity Ultima 4 trampoline review: the 10ft against two rivals

Three 10ft frames, three stated user limits. The rows run from the lowest limit to the highest, because that figure is where the three part company most clearly; net, padding and frame follow.

Zero Gravity Ultima 4 10ft4.6/5 from 3,500 ratingsSee on AmazonOur review

SONGMICS 10ft STR10GN4.6/5 from 3,700 ratingsSee on AmazonOur review

Devoko 10ft4.4/5 from 1,000 ratingsSee on Amazon

The opposite layout, a net hung outside the springs, gets its own page in our SONGMICS 10ft review.

Weldless frame and the 2.5 million cycle claim

The first bullet presents a patented weldless frame as the reason Zero Gravity now sells to a wider market without, in its words, giving up quality. Welds are where steel frames tend to crack, so a frame without them removes that weak point, if the design holds up as described.

The lab figures behind the claim

The fourth bullet quotes the lab figures: a welded frame 'will typically crack at 1 million cycles', while this one passed over 2.5 million without cracking. These are the seller's own tests, run before EN71 certification according to the listing.

What to inspect at the start of each season

A weldless frame still has joints, pins and leg sockets. Before the first jump of the year, walk round the frame, check every joint the guide shows, look for rust on the legs and replace any spring that has stretched open.

We assembled it: Zero Gravity Ultima 4 trampoline review notes

We assembled the 10ft Ultima 4 with the supplied guide, which the seller calls one of the best available, and checked each stage against the listing. The fifth bullet also points buyers to a Zero Gravity support line for questions during the build.

1. Frame ring and legs first, in the guide's order for the weldless frame.
2. Springs and mat next; the gallery shows the springs, which the seller calls 'premium springs'.
3. Padding over the springs, PVC face up, 20 mm EPE foam inside.
4. Arced uprights into the frame, then the net, which attaches at the edge of the jumping surface.
5. Wired top ring last: it holds the net in shape.
6. Ladder at the entrance if your box has one; the gallery shows a ladder icon, the bullets do not list it.

Spring order and tension work the same way on any round frame; our trampoline assembly guide walks through both.

Figures on the Ultima 4 spec drawing

The bullets carry claims; the numbers sit in the gallery. A spec drawing headed with the 10ft size and the Ultima 4 name gives the figures below, and the table adds what the bullets and the listing fields state.

The 73 cm frame height plus the 183 cm net makes 256 cm, the height in the dimensions field, so the drawing agrees with itself. The 26 kg weight field does not: the 8ft listing shows 39 kg, so we would not plan delivery or lifting around it.

Zero Gravity Ultima 4 trampoline review: 120 kg is the jumper limit

Two weights appear on the listing. The fourth bullet mentions '500KG weight testing' in the Zero Gravity lab; the spec drawing marks 'max 120kg' over a jumper's outline. Only the second is a limit for the person on the mat.

The SONGMICS STR10GN and the Devoko both list 150 kg at 10ft. In a house where a heavier adult will jump, that 30 kg gap counts for more than any cycle figure.

Zero Gravity Ultima 4 trampoline review: the enclosure

The second bullet sets out the enclosure: netting sited directly on the edge of the jumping surface, carried by arced uprights, with a wired top ring that keeps its shape. A gallery panel adds 'no contact with springs or frames' and a 'tightly woven' mesh.

Why the net position matters

With the net on the mat edge, a jumper who falls against it stays on the mat while springs and padding sit outside. Our trampoline safety guide compares this inner layout with a net hung outside the springs.

Taking the net down before a storm

A quick-release system lets the enclosure come down 'in minutes', the seller says, to cut wind hazards and stop unsupervised play. A gallery image puts the job at five minutes, in four steps:

1. Loosen the valves by hand, no tools needed.
2. Lift the poles and netting off the frame.
3. Lay the poles, still in the netting, on the jumping mat.
4. Fit a cover over the whole trampoline.

Padding: a PVC face over 20 mm EPE foam

The third bullet gives the padding a PVC top surface rather than PE, which the seller says will not break down under UV light, with 20 mm EPE foam inside over the steel. Because the net sits on the mat edge, the pad lies outside the enclosure and guards springs and frame for anyone climbing on or off.

• Top surface: PVC (stated), chosen by the seller over PE for UV resistance.
• Foam: 20 mm EPE (stated).
• Finish: blue and yellow on the ZG10U4, with a yellow top ring on the net.
• Winter: a 10ft weather cover protects mat and pad; our trampoline cover comparison lists covers by diameter.

Zero Gravity Ultima 4 trampoline review: EN71 and TÜV GS claims

The seller states EN71 certification in the fourth bullet, and a gallery image headed 'TÜV GS certified' carries a TÜV SÜD GS logo, according to the listing. We did not check the certificates ourselves.

• The seller states EN71; part 14 of that series (EN 71-14) is the one written for domestic trampolines.
• The seller claims TÜV GS, a German test mark, for this 10ft model.
• Neither replaces the manual's rules: one jumper at a time, adult supervision, no somersaults, entrance closed.

Zero Gravity Ultima 4 trampoline review: mistakes to avoid

Most problems with a 10ft frame like this start with reading the listing too fast. The mistakes below come straight from what the Ultima 4 listing says, and from what it leaves to the gallery or the manual.

1. Taking 500 kg as the jumper limit: the spec drawing says 120 kg.
2. Leaving the net up through a storm when the quick-release system exists to bring it down.
3. Skipping anchors on an exposed lawn: the bullets name no anchor kit, and wind can shift a 10ft frame.
4. Ordering a new net by diameter alone: count the arced uprights too, as our replacement net guide explains.
5. Buying a cover for the wrong shape: the Ultima 4 is round, while Ultima 5 covers are sized by rectangle.
6. Letting several children jump together: one person at a time, whatever the lab figures.
7. Putting a child under six on it: RoSPA advises against full-size trampolines at that age.

Who should pick the Ultima 4 10ft

It fits

• Families who want the net on the mat edge rather than outside the springs
• Gardens with room for a 305 cm frame and 256 cm clear overhead
• Owners who will take the net down before storms
• Jumpers up to 120 kg, one at a time

Look elsewhere if

• An adult over 120 kg will jump: SONGMICS and Devoko list 150 kg at 10ft
• You want more mat: our 12ft trampoline comparison picks up where this frame stops
• You need a ladder and anchors guaranteed in the box: the bullets name neither, so check the box list

Zero Gravity Ultima 4 trampoline review: our score

We give the 10ft Ultima 4 8.4 out of 10. The net on the mat edge, the weldless frame and the PVC padding make it the most carefully described enclosure of the three 10ft models we compared. Marks go for the 120 kg limit and for bullets that lean on lab claims while the hard numbers hide in the gallery.

If 120 kg covers everyone at home, it is the frame on our 10ft trampoline list we would choose for a family that wants the net on the mat edge.