Last spring I purchased a mountain bike from Walmart for casual use and started riding the local trails near my house during the height of the pandemic. I desperately need an upgrade, because I'm tired of getting left behind by the other riders on the trail. I test drove a Trek FX3 today which retails for $900. I do love its' handling, design, and speed, but not its' price. Is there a comparable hybrid bike for a casual rider like me? I want to stay around $500 for a hybrid model.

That's the FX3 Disc. The caliper version is a couple hundred cheaper and cheaper still if you can find a leftover from last year. Or you can get an FX2. Even the Disc model shouldn't be awful on the wallet. I'm a Trek loyalist can you tell? But, seriously, don't be too surprised if nothing changes out on the trail. The speed is in you (or not). Don't expect a change of bike to work miracles.

Before you buy a new bike you might want to try some experiments. First get fit. That will take awhile. I don't know what the tires on your bike are but you might want to upgrade to gravel tires rather than Mountain bike tires. They should spin up more easily. Unless you are actually mountain biking. I'd give it another season, save my money and, perhaps, next year buy a bike you now know you need. Good luck.

When you say "trails" do you mean dirt or paved? In either case for $500 you're probably better off looking at used bikes. This from someone who doesn't like buying used bikes.

The bike probably isn't your issue. You just need to ride more and learn how to fuel for the type riding you do. Ask those others you can't keep up with how long they've been riding.

10 points for creative use of apostrophe.

If I were a new rider (with 30 years of cycling experience) these would be my priorities

A frame size that let's me reach to the handlebars with the body position I prefer.
Maybe a step-thru helps, maybe a crank forward design (easily putting feet on the ground when stopped).
A comfortable saddle, but you don't sit on it the whole ride.
Handlebar with grips that feel good to my wrists/hands
Gearing appropriate for the terrain ridden.
It makes me smile - color or something less tangible. Maybe cost.

Nothing on the list says 'new bike', unless that's needed to make you smile.

Tell us where you live we might assist with online sources and shops that sell used and new.

At this level of biking, nothing special about a Trek - or Specialized - or Giant.

You essentially have 3 choices:
1. Find a bike that you like and pay whatever it happens to cost.
2. Set a bike buying budget and buy a bike that meets it.
3. Try to learn to love the bike that you have.

The higher priced bikes really are nicer but the performance improvements tend to be iinear while cost increases are more exponential. I've pretty much done all three in various stages of my riding career and I can honestly say that my riding fun factor has remained pretty constant.

For 20+ years, one of my passions was teaching people how to drive high performance sports cars on race tracks and road courses. Many of the novice drivers I worked with wanted to either upgrade their existing car with 'go faster' modifications or buy a newer/faster car with hopes & expectations that they would become better & faster drivers. My answer to each and every one of them was....
"Get more seat time in what you have. Chances are excellent that you will never exceed the capabilities of your car. Once you have a clear understanding of the capabilities of your car and, more importantly, your own capabilities, then you should be able to seriously consider what your next step would be."
I think the same thing holds true with bicycles. Buying a newer, more expensive, faster bicycle does not necessarily mean that you will instantly become a better, faster rider. Get lots of time with what you have. By gaining that knowledge and experience, it will make you more capable to make a much more intelligent decision on what your next bicycle will be. Just my .02.....have fun!

But it could if he's riding an ill fitting pos and upgrades to a nice bike that fits.

If one is already riding an appropriate bike for their purposes then there will be little difference with an upgrade.

I'm going to support your belief that the bike is an important part of your issue. Department store bikes are miserable things. They are heavy and mechanically inefficient. Not to mention it is understood the average department store bike gets ridden less than 100 miles in it entire lifetime, so they are built to suit.

A well designed and manufactured bike may very well make a big difference in your experience. It may not keep youy from getting dropped by other riders, but you'll likely enjoy riding it more, so you'll likely ride it more. Eventually, you'll be dropping people. Can you do that on a Wal Mart bike? I don't know. I've never actually seen anyone do it

Used can be a good way to go, but keep in mind, having to pay someone to replace a worn drive train, for instance, can quickly add $200+ to a bike you just bought. And just a pair of new tires can easily be $100. Do you have any shops near by that sell used bikes they've gone over and will stand by? That might be a good way to split the difference.

Or, take the advice I give to myself but never follow; don't cheap out when buying a bike. Too many times I have not spent enough money on a bike. I end up with something capable, but not inspiring. If you're really excited by the $900 bike, try to swing it. You might just have it the rest of your life, if not a decade or two. OTOH, if you go cheap, you may be right back in this same dilemma in a year or two.

It is the rider not the bike... except when we're talking about Walmart bikes. OP probably has a heavy hunk of poorly assembled junk.

guinallen, check out the selection at real bike shops, or at least real sporting good shops like REI. You don't need to think about a specific brand. Your budget is below what I would call realistic, but not by much. You can get something fun and serviceable for $600 or so. And you don't need disk brakes or a suspension fork. And don't get it on-line because you don't know what you don't know and you'll likely be disappointed again.

If you are reasonably mechanically inclined, a used bicycle is the way to go, just a well-maintained late model used car generally is. Your own level of physical fitness/training and how appropriately the saddle and handlebars are adjusted to fit you are more important than the machine itself, but any upgrade from a WalMart offering will help at least somewhat.

I guess I'm kind of lucky - I've never owned a bad bike since I was 15. The joy that I experience riding has always been linked to the sound and precision of a clean shift, strong brakes, crisp and stable handling on descents, and a feeling of lightness on climbs - basically the merger between man and machine. I feel the same way carving a high performance ski.

A friend picked up riding for the first time last May, on a borrowed Cervelo R5 with mechanical Dura Ace. He went from novice, tipping over at stoplights and grinding up shallow climbs, to riding 40 to 50 miles with me at close to 20mph. I think the bike had something to do with his quick progression.

As for the OP, I subscribe to the belief that if you think your bike is holding you back, it probably is. New technology may inspire him to do the harder work that in turn will breed more success.

I use to commute by bike for 11miles one way. Having several bikes and tracking avg speed allowed me to compare. I really didn't matter if I was riding this:
P1010551
or this
2010 Langster Steel 61cm on Flickr
or this
1997 Specialized RockHopper on Flickr

the difference in speed and time was related more to traffic. Most of the route was on a MUP. OH, average speeds were about 15 to 17 MPH.