I bought a new bike and was wondering why my rear wheel starts to vibrate at higher speeds. I also have high carbon rims (50mm) for the first time and thought it must be the rims. But I mounted the bike in my bike stand and then I realised that when I move the rear wheel it has an effect on the whole bike. Is that normal? I find it very unnatural. What could be the reason for this?
Note: They are 28 mm wide tyres with an inner tube.
Video: https://streamable.com/9o0a8i
rims unbalance road bike
As said in comments, when you spin the rear wheel, that wobble is caused by the wheel being out of balance. I appreciate that the wobble may seem scary on the stand, but when you're sitting on the bike, you have quite a bit of weight on that rear wheel. That said, the imbalance doesn't usually cause the bike to shake on the stand.
I think that if the imbalance causes problems, they might occur at higher speeds, maybe in corners. You could first verify by trying a long straight descent, and maybe take some corners you know well.
If you are interested in actually balancing the wheel, Flo Cycling has a YouTube video where they apply golf weights - small, adhesive-backed lead weights that can be cut by scissors - to a wheel to balance it.
Otherwise, that looks like a new bike judging from the stickers still on the crank. If warranty applies, a wheel manufacturer in the West seems likely to warranty the rear. Of course, if you bought them overseas, the manufacturer may or may not be willing to accommodate you. You could certainly try anyway.
I've seen bikes bounce like that in the workstand. Many bikes wheels are out of balance. If it's in the stand and you get it going silly fast it will bounce.
But, at riding speeds with a person on-board the rider doesn't feel it. Go for a ride, try different speeds. If you feel it check Weiwen's sources for balancing.
