YOSUDA Folding Exercise Bike

I've been using this exercise bike regularly for the past four months, and here's what I've observed: Pros: The bike has a sturdy build and operates quietly. If any noise arises from the bike's components, further tightening may be required. For instance, the pedals might be challenging to secure fully, but it's necessary for a quiet ride. Cons: Oversized Seat: The seat is overly large, causing discomfort to my thighs during cycling (I am 5 10, and 176 lbs). The customer service was not particularly helpful. When inquiring about alternative seat options or what to look for in replacements, their response was vague, merely confirming the seat's replaceability. When I asked for part links that I could buy from or specific seat types I could look for from other bike stores, they did not reply. Rust Formation: Notably, some parts began rusting within two months, despite normal usage and storage in a dry area, as shown in the attached pictures. Customer service suggested it was due to sweat, advising immediate cleaning post-exercise. However, these parts are situated directly below where one sweats, and it's reasonable to expect an exercise bike to withstand sweat exposure. Given the bike's intricate foldable design, cleaning these folding areas after each use is impractical, indicating a potential design flaw. Limited Adjustability: The bike only offers one adjustable feature, the seat height, which is understandable given its price point. Nevertheless, regardless of seat height adjustments, the bike's structure does not fit to my leg length, resulting in knee discomfort. It might be worthwhile to invest a bit more in a bike with greater adjustability. Insufficient Resistance: Even at the highest setting of 8, the resistance is not challenging enough to elevate my heart rate significantly. I'm not an avid cyclist; I simply cycle for fitness. Yet, pumping heart rate above 150 bpm is very difficult, unlike my experience with non-foldable stationary bikes.