Most hammock seats need around 25 cm (about 10 inches) of clear space behind your stroller seat to install safely. If you have that, you're almost certainly good to go. If you're not sure, this guide shows you exactly how to measure it — no tools beyond a tape measure, and it takes under a minute.
Key Takeaways
Aim for around 25 cm of clear rear space between the back of the seat and any obstruction.
Measure straight up from the centre of the rear axle to find your stroller's usable rear zone.
Most baskets can be repositioned or removed in seconds — don't assume the basket is a reason to check with us first.
City strollers, travel-system strollers, and premium full-size strollers tend to have the most rear clearance.
If you're unsure, send us a photo of your stroller and we'll help you check.
The 25 cm rule: why rear clearance matters
A stroller hammock seat hangs vertically behind your stroller's main seat. When a child sits in it, the seat needs enough room to hold their body comfortably without pressing against the basket, canopy, or rear frame bars. If the space is too tight, the seat can't hang freely — and that affects both comfort and stability.
The 25 cm figure is a practical guide. It covers the depth of the hammock itself plus a small buffer so the seat can settle naturally under your child's weight without resting against anything it shouldn't. Most full-size and mid-range strollers comfortably clear this. Ultra-compact and ultra-light strollers sometimes don't — which is one reason they're generally not the best match for a hammock seat add-on.
The good news: you can check yours in under a minute, right now, with no guesswork.
How to measure your stroller's rear clearance
Open your stroller fully and lock it in its normal in-use position. Apply the brake. Set it on flat ground. Then do this:
Find the rear axle. This is the horizontal bar that runs between the two rear wheels. Stand behind your stroller and locate the centre point of that axle.
Hold a tape measure vertically. Start from the centre of the rear axle and measure straight upward.
Note the first obstruction. This could be the bottom of the shopping basket, a cross-bar, or any frame element that blocks the rear zone. Measure to that point.
Compare to 25 cm. If you have 25 cm or more before hitting that first obstruction, your rear clearance is a good starting point for a hammock seat.
That's the whole test. It doesn't require you to remove anything yet — just measure what you have right now, with your stroller set up the way you normally use it.
What the basket does (and doesn't) block
The shopping basket is the most common thing parents worry about. And it's a fair concern — on some strollers, the basket hangs low and sits right in the rear zone. But in most cases, it's less of a problem than it looks.
Here's why. Most stroller baskets either clip onto the frame or slide along a rail. They're not permanently fixed. This means that even if the basket is currently sitting in your measured rear zone, you may be able to push it forward a few centimetres — which is often enough to open up the clearance you need.
When you measure, note whether the basket is blocking the zone or whether it's a fixed bar or frame element. If it's the basket, check whether it can slide. If it's a hard frame component, that's a real constraint and the measurement stands as-is.
A few basket situations that parents often flag:
Basket clips to two points on the frame. Usually can be unclipped and repositioned forward in seconds.
Basket slides along a single rail. Push it as far forward as it will go and re-measure the rear zone.
Basket is fixed and integrated into the rear frame. This is less common but does occur on some compact strollers. If it fully occupies the rear zone, a hammock seat is not going to work on this stroller.
Basket is removable entirely. If you don't need it for a particular outing, removing it completely gives you maximum rear clearance.
The takeaway: measure with your basket in its normal position, then check if it can be moved. Don't write off your stroller until you've tried both positions.
Common stroller types and their typical rear clearance
Not every stroller is built the same, and rear clearance varies quite a bit depending on the design. Here's a practical overview of how different stroller categories tend to perform.
City strollers
City strollers are designed for everyday urban use — streets, shops, public transport. They tend to have a well-proportioned rear zone, with baskets that sit low to keep the centre of gravity stable but that are usually repositionable. Many city strollers clear 25 cm or more without any modification.
The key thing to check on city strollers is the basket position. On models where the basket hangs right below the seat, push it as far forward as it will go before measuring. You'll often gain 5–8 cm this way.
Travel-system strollers
Travel-system strollers — those designed to work with a car seat or carrycot on top — tend to have generous rear clearance. The seat sits higher on the frame, the rear zone is kept clear for the chassis legs, and the basket usually clips well clear of the rear axle area.
These strollers are often among the most straightforward to check. Rear clearance tends to exceed 30 cm on full-size travel systems. The frame is also typically robust and wide, which helps with overall stability when adding a hammock seat.
Premium strollers
Premium full-size strollers are generally well-suited for a hammock seat add-on. They're built with strong, rigid rear frames and generous proportions — both of which tend to translate into good rear clearance. Their baskets are usually accessible and repositionable, and the rear bar geometry is typically flat and easy to strap onto.
If you own a premium stroller and are wondering whether it will work with a hammock seat, it's worth running the measurement — but the odds are good. The main thing to verify is total weight capacity, especially if your baby is already on the heavier side or you carry a lot in the basket.
When rear clearance is not the only check
Rear clearance is necessary — but it's not the whole picture. A stroller that clears 25 cm in the rear zone still needs two other things to be a good match for a hammock seat.
A stable rear frame
The hammock seat attaches to the stroller's rear frame, and that frame needs to be solid. Press down on the rear handlebar with both hands and half your body weight. If the frame doesn't flex visibly and doesn't creak, that's a strong sign. If it bends or wobbles, the frame may be too light for the load a second child adds.
Ultra-light umbrella strollers often need a closer look this check regardless of how much rear space they have. A clear rear zone doesn't help if the frame isn't strong enough to hold the seat steady.
Enough total weight capacity
Every stroller has a maximum total load — usually printed in the manual or on a sticker near the rear wheels. Before installing a hammock seat, add up:
The weight of your younger child in the main seat
Anything stored in the basket
Your older child on the hammock seat
The total must stay within your stroller's rated capacity. Hoppie is designed for children from around 18 months to 5 years old, up to 20 kg / 44 lbs. Always check both Hoppie's instructions and your stroller manufacturer's maximum load capacity before use.
If you're unsure whether your stroller works — whether it's the clearance, the frame, or the weight capacity — send us a photo of your stroller from the side and from the rear and we'll help you check.
What a good rear zone looks like in practice
When everything lines up — enough rear clearance, a solid frame, and adequate weight capacity — the installation is straightforward. The hammock seat hangs vertically in the rear zone, clear of the basket and frame, with the straps running cleanly along the rear bars. Your older child sits in it naturally, feet hanging free, the stroller's width completely unchanged.
That last point is one of the reasons parents like this setup. A hammock seat doesn't make your stroller wider. Café doors, shop aisles, lift doors, and bus access that already worked for your single stroller still work exactly the same way.
Always follow Hoppie's installation instructions and check your stroller manufacturer's maximum load capacity before use. Always supervise your child while using Hoppie.
FAQ
How do I measure stroller rear clearance?
Open your stroller fully and lock it in its normal in-use position. Hold a tape measure vertically from the centre of the rear axle and measure straight upward to the first obstruction — usually the bottom of the shopping basket or a frame bar. Aim for around 25 cm of clear space. That's the practical guide for a hammock seat to hang freely and safely.
Does the basket block hammock-seat installation?
It depends on the basket. Most stroller baskets can be unclipped or slid forward a few centimetres, which is often enough to open up the rear zone. Measure your clearance with the basket in its normal position, then try repositioning it forward and measure again. Fixed, integrated baskets that can't move and fully occupy the rear zone are a genuine constraint — but this is relatively uncommon.
What's the minimum rear space for an add-on seat?
Around 25 cm (about 10 inches) of clear vertical space from the rear axle upward is a reliable guide. This gives the hammock seat enough room to hang freely under your child's weight without pressing against the basket or frame. Less than this, and the seat may sit awkwardly or put pressure on parts of your stroller it shouldn't.
Can I remove the basket to fit a hammock seat?
Yes, if your basket is removable. Many parents remove the basket for outings where they don't need it — school runs, quick trips, travel days — which gives maximum rear clearance. For outings where you need storage, check whether repositioning the basket forward is enough, or consider a small bag that clips to the handlebar instead.
Does rear clearance vary by stroller type?
Yes. Travel-system and premium full-size strollers tend to have the most rear clearance, often exceeding 30 cm. Standard city strollers usually clear 25 cm or more when the basket is repositioned. Ultra-compact and ultra-light strollers — especially umbrella-style models — tend to have the least rear space and are generally not a good match for a hammock seat add-on.
Is rear clearance the only thing I need to check?
In many cases, Rear clearance is necessary but not sufficient. You also need a stable rigid rear frame — one that doesn't flex under firm hand pressure — and enough total weight capacity on your stroller to safely carry your younger child plus your older child on the hammock seat. All three checks matter.
What if I'm not sure my stroller has enough rear space?
Send us a photo of your stroller from the side and from the rear, with the basket in its normal position and then pushed forward if possible. We'll look at it and let you know whether Hoppie is likely to be a good fit. It's the fastest way to get a clear answer without guessing.
Most parents have more than 25 cm — check yours before ordering
Rear clearance is simpler to check than most parents expect. Grab a tape measure, open your stroller, and measure straight up from the rear axle. Most full-size and city strollers clear the 25 cm guide without any adjustment. Many clear it easily once the basket is pushed forward.
Hoppie is designed for children from around 18 months to 5 years old, up to 20 kg / 44 lbs — a practical second seat for the days when tired little legs need a rest. If your stroller has the rear space, a rigid frame, and the weight capacity, Hoppie adds a smart second seat without replacing the stroller you already love.
Keep the stroller you love. Add a second seat when you need it.
Disclaimer: Hoppie is an independent product and is not affiliated with, endorsed by, sponsored by, or approved by any stroller brand. Always follow Hoppie's installation instructions and check your stroller manufacturer's maximum load capacity before use. Hoppie should only be used with strollers that have a stable rear frame and enough rear clearance. Always supervise your child while using Hoppie.
