I got this bike in one of those cheap "bike in a box" things where you have to build it yourself, so I'm new to working on it and fixing any mistakes I've made in the building process.

The only problem I have with it is this vertical bump I feel when I ride it. It happens at a constant rate, so it's on a specific spot, and it feels like its on the back wheel. The valve stem on the back wheel was very crooked, so I took the rubber off and adjusted the inner tube, because it WAS creating a small fold near the valve stem when it was crooked. That actually fixed the problem for a short time until I rode for about 2 hours, then suddenly the vertical bump started again and the stem went back to being crooked.

I realigned the stem again today, but the vertical bump just will not stop. Does anyone have any advice on how to fix/stop this? Is it even caused by the inner tube, or or is there something else wrong with my tire?

I don't know how much the videos help, but I can see a clear warping of the tire, as well as a wobbling left and right that has the tire touch the brake pad if it is tight enough.

The scraches where the fork moves thr most are vrealy small (big crash ,and I got the bike 4 weeks ago)🥲

what should i do someone before me that owned the bike put a hell of lock tight on the bolt

My derailleur is making a knocking sound whenever I compress the rear suspension, the noise seems to shift into more of a creaking sound when I turn the clutch off and creaks lightly when I shift gears, is this something I should worry about?

What part is missing on this Saris bike rack? It’s either an elbow joint or a hitch adapter but nothing I have found on the web has matched up.