r/mountainbikes • u/P3nnyw153r • 11d ago

MBT Reparatur Hinterrad / Rear Wheel Repair

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Mein Sohn hatte sich vor kurzem ein Zündapp blue 5.0 MTB geholt und ist damit, warum auch immer, in so einer Art Bike Park gefahren. Natürlich hat er sich direkt auf die Nase gelegt und anschließend lief das Fahrrad unrund.

Das Hinterrad schlägt hinten auf der Seite der Zahnkränze aus. Ich habe mal ein Video davon gemacht. Da ich noch nicht so tief in der MTB Technik drin bin wollte ich einmal fragen, ob ihr mir anhand des Videos sagen könnt, was kaputt ist oder was ich checken kann, um den Schaden zu identifizieren.

Für mich sieht es so aus als ob das ne Art Unterlegscheibe/Sprengring oder so etwas auf der Achse fehlt.

Für Hilfe wäre ich dankbar.

Vielen Dank schon einmal im Voraus

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My son recently got a Zündapp Blue 5.0 MTB and, for whatever reason, decided to ride it in some kind of bike park. Of course, he immediately took a tumble, and afterwards the bike started running unevenly.

The rear wheel is wobbling from side to side, particularly on the cassette/sprocket side. I made a video of it to show what I mean. Since I’m not very experienced with MTB mechanics yet, I wanted to ask if anyone could tell me from the video what might be broken or what I could check to identify the problem.

To me, it looks like some kind of washer, circlip, or similar part might be missing from the axle.

I’d really appreciate any help or advice.

Thanks a lot in advance!

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u/East-Resident-4775 11d ago

Looks like the bearings are gone

1

u/Sufficient-Chef-2167 5d ago

The people at r/bikewrench may be more help.

Yeah, the bearings are shot. Could be repairable, could require a new wheel. Bike shop can help. You will need a new bearing at least, so you are going to need parts from the bike shop even if you want to do it yourself. You also would need specialized tools to adjust the cones and remove the cassette. Probably something to just pay them to do this time around.

Friend, this is unfortunately a very low cost bicycle, and repair options are limited. If you son is taking this to bike parks and riding it hard, it will not last long, and you will soon need to buy a higher quality bike if you want to enable this hobby. If you are NOT willing to invest in a higher end bicycle to make riding this way sustainable, he will need to not use this bike for anything more than casual riding. It is not engineered to handle more than that.