Rastmitnehmer

16:04 Dec 7, 2023 

Perhaps it's a coinage by one manufacturer, but it doesn't have to be a mistranslation.

We've had this issue multiple times before; what looks like a newly minted word is essentially just two German nouns put together (since you're actually allowed to do that in German).

"Rast" is, in my opinion, short for "Rastung" here. As an example (though, that's for the visor):
"Das Klappvisier wird mit 3 Druckknöpfen am Helm befestigt und kann mittels einer fein abgestuften Rastung in jede Position gebracht werden."
https://www.motorradgarage.de/visiere

I would expect "Aufnehmer" to be used for the end piece and "Mitnehmer" for some part in the middle. Say, you've got a "Kinnriemen," as Johannes actually said (but then, inexplicably, posted something about dogs), and it needs to be put through something. Similar to:
"Ein neuer Edelstahlverschluss mit zwei Rastungen macht das Öffnen des Kinnriemens noch einfacher."
https://www.icasque.de/Motorradhelm/Klapp/neotec-ii-matt-blu...

Maybe that helps.

Best wishes

15:27 Dec 7, 2023 

I find it suspicious that, as Johannes points out, most of the very few hits for this word relate to a brand called Helm, suggesting it's a coinage by one manufacturer.

This seems too much of a coincidence, and I wonder if Rastmitnehmer is a mistake, perhaps mistranslated from another language.

14:26 Dec 7, 2023 

I also came across the company Helm first, though they don't make motorbike helmets, but sliding doors and building hardware:

HELM MK-M 140 G 130
Schiebetürsystem für 2-flg. Teleskopanlagen bis 140 kg/Flügel, 8/8,76 und 10/10,76 mm ESG/VSG, Deckenmontage
https://www.woelm.de/helm-schiebebeschlaege/innenschiebetuer...

Unter den Marken HELM Schiebebeschläge, KWS Baubeschläge und HELM Fördertechnik entwickeln und fertigen wir innovative Produkte und Produktsysteme:
https://www.woelm.de/unternehmen/ueber-woelm.html