The Whale Fall Bike Phone Holder seems to handle rough terrain pretty well. According to the manufacturer's description, it has anti-slip pads designed to keep the holder from shaking or sliding on your handlebars while you're riding.

From what we've gathered, many people have found this phone holder to be quite stable on bumpy trails. Some mentioned that it holds their phones securely without any slipping issues, which matches what the manufacturer claims about its sturdy attachment.

As for setting it up, it's pretty straightforward. There's a quick-release mechanism that lets you attach or detach the holder easily without any tools. This is super handy if you need to switch it between bikes or take it off quickly after a ride.

The manufacturer describes it as a design that lets you "take out the bag in 1 second," and people seem to agree with how easy it is to use. We came across remarks like "Very easy to install," highlighting this convenience.

Overall, it's typically stable, but just to be safe, make sure you tighten it enough before heading out on really bumpy paths. This helps keep everything secure and prevents any accidental shakes.

So, if stability and ease of use on rough terrain are what you're after, the Whale Fall Bike Phone Holder seems to check those boxes nicely.

Yeah, the Whale Fall Bike Phone Holder should work for bigger phones like the Galaxy S23 Ultra.

The manufacturer says it can fit handlebars with a tube diameter of less than 45mm, so it's pretty flexible and can be used on different bike types: mountain bikes, road bikes, city bikes, and even electric ones.

While the manufacturer's description doesn't spell out exact phone sizes, our research shows it's made to handle bigger phones. So your Galaxy S23 Ultra should fit.

Still, it's always smart to double-check the size specifics just to be sure it'll hold your phone securely.

Setting it up is pretty straightforward—you won't need any special tools. It comes with thickened buckles and anti-slip pads, which should keep it steady on your bike.

Just be aware that, according to our research, it might loosen a bit on really rough surfaces, so make sure to tighten it well from the start for the smoothest ride.

All in all, the Whale Fall Bike Phone Holder seems like a solid choice for fitting various phone sizes and bike types.

Just check your handlebar space, make sure the fit is snug, and you should be good to go with your Galaxy S23 Ultra on your rides.

If you're curious about how waterproof the Whale Fall Bike Phone Holder is, here's a breakdown. This holder does a good job of keeping your phone dry when you're out biking in unpredictable weather.

The manufacturer describes it as having a one-piece structure made from hard EVA material, topped with a waterproof coating. It's designed to shield your phone and other belongings from rain, which is definitely a relief when you get caught in a surprise shower.

For really heavy rain, it comes with a rain cover for extra protection. This isn't just something the manufacturer claims; our research backs this up too. Many folks have shared that this holder keeps their phones safe and dry, even when the rain unexpectedly hits.

Plus, you can still see and access your phone for stuff like GPS or checking ride data while on your bike.

There is one thing to note: some have pointed out that the zipper area isn't completely waterproof, so there might be some minor leaks in a heavy downpour. Keeping that rain cover ready to go is a smart idea.

But overall, it seems to manage light to moderate rain well enough, which should give you some peace of mind on your rides.