Hi, I wanted to comment that I'm not sure it's the rim brakes causing your problem. I think I have the same brand TPU tubes as you (at least also orange AliEx ones) but on a disc brake bike. Both front and rear have had this exact thing happen to them the past two weeks, after no issues for 3-4 months prior. Indeed, in the summer weeks I've been riding at 38C weather. Tires are catching sun at the cafe stop, which is when the first lost all pressure. Second one lost pressure at home after a ride. So both in the exact same manner as you: hot tires (due to weather), no problem when riding (and applying pressure to the tubes) but when you get off and the pressure eases, the gap is created.

TLDR: I think its just a very shitty brand and I'm gonna check if I can contact the seller and/or AliEx to report the issue. Too bad I got 6 tubes from them which I'm hesitant to use at all now...

(nb I know TPU + rim brake is not the most heat resistant, but as long as you don't go full braking down Ventoux it should be manageable in my experience)

thanks for your feedback. That makes me feel a bit better about trying the ridenow tubes on my rim-brake bike.
I also got some turquoise Spongo tubes of Amzon with metal valves. They look good, but I am hoping they don't have the same issues as the orange ones. I might try them on the backwheel first. 😅

Can someone recommend some good long sleeve jersey? Autumn is coming
Not a thick/winter one. A thin one which I could combine with a vest.

for a thin long sleeve, I like this SPEXCEL one. I got the purple in L for a tight aero fit (186 cm, 80 kg). The arms are long enough. Could have also gone with the XL.

https://de.aliexpress.com/item/1005012047015961.html

Yesterday I was riding in about 38°C down a very steep descent (800m vertical with 13% average) with rim brakes on alu brake tracks.

I tried to release the brakes as much as possible, but at 13% with lots of turns, a lot of braking is required.

At the bottom I stopped at a fountain, and when I wanted to continue, my front tire was flat.
The welt of the TPU tube had separated. I am very very glad that it didn't happen while riding down.
These are some random TPU tubes from Amazon, which are around 40g, so not the super-light type. Rode them for around 1000km.
I changed the flat with a spare 28g TPU tube and rode home without issues.

I think I will switch to butyl while this heatwave in Europe is continuing and, afterwards, might try the Ridenow 38g tubes with alustem.

Has anyone of you ever had a similar issue?

I'm really enjoying my rim-brake Hygge model S.
Didn't want disc-brakes, and this ended up as a nice budget build (<2000$) with Wheeltop TX and second-hand HED Jet6+ wheels (incl. G3 Powertab powermeter hub).
Shifting works flawlessly so far, and I especially like the Hygge handlebars.
8.0 kg with pedals and bottle cages in a size L.
I can probably remove 2 of those spacers.

Has anyone tried these LAMEDA bib shorts?

The sizing chart seems a bit off. Normally I am a EU-L/Asien-XL but with this size chart I am at the upper end of Asian-XXL.
Also, if you have tried them, how long are the straps compared to the rest of the sizing? I am looking for bibs with slightly longer straps.

https://de.aliexpress.com/item/1005009313979159.html

has anyone tried the YKYW skinsuit? Seems to be rather new with few reviews

YKYWBIKE Einteiliger Radsport-Skinsuit mit italienischer Interface-Polsterung, aerodynamisches Profi-Elite-Rennrad-Set, Fahrradbekleidung, Shorts
https://a.aliexpress.com/_EGdX9Mm

Has anyone else noticed compatibility issues between these specific chainrings and Shimano chains? I never experienced anything like this with SRAM chains.

I'd really appreciate any insights, workarounds, or alternative chainring suggestions that work well with a full Shimano setup. Thanks in advance!

Shimano 12s HG+ chain? Afaik those are not compatible with any narrow-wide chainrings.

I am just building up a road bike with EDS TX. I read something here about it needing a shorter chain than usual. What is that about? I ordered some 13&14 jockey wheels with bearings as a replacement for the stock 12&12. Hopefully they fit well but don't think they will appear chain length.

Also I am still undecided between 12s 11-30 or 11-34 cassette. Do you think the shifting will be better with the 11-30 and a slightly shorter chain.
Is it possible to block the large-large combination in the drEDS app?