Cybex cloud T - desperate for help!

NewbornCarSeatStress · 2025-12-24T15:46:23+00:00

Maybe this should be “am I being dense” instead but posting here for traffic. I have a 6 week old and bought a Cybex Cloud T i-Size. We’ve been really struggling with it since Ds was born because when baby is in the seat we just cannot pull the harness tight…or at all. The adjuster belt just jams shut. I’ve googled to no avail, have messaged Cybex, and even got a replacement from the shop. Unfortunately the replacement is even stiffer. To tighten the harness it takes DH using his whole body and even then it barely shifts. The belts move perfectly well when DS isn’t inside. DH is back at work and I can’t leave the house because I just can’t get DS into the carrier properly, and visits to family etc are coming up for Christmas and it’s causing so much stress. Am I missing something?! Please help because it’s driving me to distraction and all I can think is that we’re missing something very obvious - this can’t be how it’s supposed to be!

BertieBotts · 24/12/2025 16:08

I had the same issue with my Cybex Aton seat. I don't know what it is about their mechanism that does this. I used to work with baby seats and I never came across it with any other brand.

I got around it by adjusting it to the right length and then just not ever loosening it until DS grew, and then I'd do a sort of trial and error process of loosening it just a tiny bit and if it was too much, tighten it a tiny bit with the seat empty. As it's a 3-point harness rather than 5-point, and you shouldn't be using bulky outdoor clothing in the seat anyway, it works perfectly fine to do this. With the next stage seat, it is usually better to loosen/tighten each time but with the baby seat I just left it at the one length.

The other thing you can do is if you flip the entire seat over (empty of course!) you can see the strap mechanism and how it works when you tighten and loosen. So what I used to do as well sometimes was put DS in, do up the straps, then pull the slack through from the shoulder straps to the underneath of the seat using my hand reached around the back and then pull the strap at the bottom to pull the slack out of the now loose bit of harness under the seat, if that makes any sense at all.

I also found out totally by chance when DS3 was nearly grown out of the seat, that it was very slightly easier to tighten if I pulled upwards on that long tightening strap, rather than pulling it down.

Hope one of the tips is helpful.

StressedoutTeddy845 · 24/12/2025 16:08

I have that car seat and it works perfectly fine. The seat belt did jam once, we took away the cover and saw it had twisted.

Take off the cover and look underneath.

StressedoutTeddy845 · 24/12/2025 16:10

The fact that it works when baby is not in it, means you are struggling when it's clicked into the base? Are you getting the seatbealt caught in the base somehow? The strap should neatly fall in front.

Original poster

NewbornCarSeatStress · 24/12/2025 17:35

BertieBotts · 24/12/2025 16:08

I had the same issue with my Cybex Aton seat. I don't know what it is about their mechanism that does this. I used to work with baby seats and I never came across it with any other brand.

I got around it by adjusting it to the right length and then just not ever loosening it until DS grew, and then I'd do a sort of trial and error process of loosening it just a tiny bit and if it was too much, tighten it a tiny bit with the seat empty. As it's a 3-point harness rather than 5-point, and you shouldn't be using bulky outdoor clothing in the seat anyway, it works perfectly fine to do this. With the next stage seat, it is usually better to loosen/tighten each time but with the baby seat I just left it at the one length.

The other thing you can do is if you flip the entire seat over (empty of course!) you can see the strap mechanism and how it works when you tighten and loosen. So what I used to do as well sometimes was put DS in, do up the straps, then pull the slack through from the shoulder straps to the underneath of the seat using my hand reached around the back and then pull the strap at the bottom to pull the slack out of the now loose bit of harness under the seat, if that makes any sense at all.

I also found out totally by chance when DS3 was nearly grown out of the seat, that it was very slightly easier to tighten if I pulled upwards on that long tightening strap, rather than pulling it down.

Hope one of the tips is helpful.

Thank you for this. We’ve been leaving it at one length, but I’ll give the other tips a go!

OP posts:

Original poster

NewbornCarSeatStress · 24/12/2025 17:36

StressedoutTeddy845 · 24/12/2025 16:08

I have that car seat and it works perfectly fine. The seat belt did jam once, we took away the cover and saw it had twisted.

Take off the cover and look underneath.

Unfortunately we’ve already checked under the covers and can’t see any issues, but thanks

OP posts:

Original poster

NewbornCarSeatStress · 24/12/2025 17:38

StressedoutTeddy845 · 24/12/2025 16:10

The fact that it works when baby is not in it, means you are struggling when it's clicked into the base? Are you getting the seatbealt caught in the base somehow? The strap should neatly fall in front.

It happens out of the base too so isn’t being caused by the isofix, but the strap is always free either way. Thanks though!

OP posts:

BertieBotts · 24/12/2025 21:38

On my seat it wasn't a base related issue, the only difference was literally if the baby was in the seat or not. Perhaps it is a weight thing, because if I tried it with a teddy bear it tightened perfectly fine. The straps tightened freely when the seat was empty. I never worked out what exactly caused it and I don't have the seat any more to experiment (youngest is now 4).