I just turned 40, trying to stay in shape. I can not continue to jog knees will not hold up. Trying to decide between a trek 7.3FX or a Hybrid 7300 which one is better. HELP!!!

Here's some reading for you

https://www.bikeforums.net/search.php?do=process

edit..that didn't work. Trying searching for * 7.3 7300 *

They are often compared but are very different in the way they ride and your riding position.

Thanks Iam new to riding, i just want to get the right one

Without knowing anything about you other than your jogging background, I'd say get the FX. If you had said that you were a walker I would have said get the hybrid.

"Better" is meaningless until you relate it to a purpose.

It depends on what you wannabe. Do you want something that is more road oriented, i.e. lighter, quicker and a little more aggressive? Or do you want something that is heavier duty, more mellow and relaxed?

The 7.3 is more road oriented with a flatter stem and more road bike feel and geometry. It's basically a road bike with flat bars. It will slice through the air a bit better than the 7300. But it will feel more rigid and be less forgiving in the ride.

The 7300 is more mountain bike oriented with a taller stem and a more relaxed feel. If you ride some dirt paths, it will be more forgiving than the 7.3. It also has some suspension to ease the bumps of the world. But suspension also robs you of some power.

Depending on what you want to do with the bikes, I'd suggest coming up with a little more cash and jumping into the deep end of the pool, rather than spend time wading around the shallow end with hybrids. If you want to ride road rides and go fast, get a road bike. The Trek 1.2 isn't bad. If you want to dabble in mountain bikes, get a mountain bike. The 4500 is a very good mountain bike.

Don't fiddle around with a flat bar bike. For the amount of time that you'll end up wanting to spend on a ride, being stuck with one hand position -- and a high, non-aero one at that -- will start to get annoying and, ironically, less comfortable than the hybrid marketers will have you believe.

On the other hand, a hybrid will do okay while you decide where you like to ride the most. Once you figure that out, get that second bike specifically for that purpose. Then you'll still have the hybrid as a backup bike, for friends to borrow, for more laid-back rides, etc.

(my post isn't much help, is it? )

If you jogged for fitness, I would suggest a nice, conservatively-fitted road bike. A lot more fun to ride, and it may actually be more comfortable if the saddle isn't too high and the handlebars too low. There are many models nowadays from which you can pick a frame that is larger than what racer-oriented formulas will suggest, and they can be setup very nicely - and more aggressively later on if you want to go that way. Why ride heavier and pokier if you don't have to, especially if you want to say fit or improve fitness.

Yes I know about those knee problems,But I will never understand why anyone would jog,riding a bike takes you farther in the same time as jogging and it don't cost much to ride on,just maybe a few more hot dogs.

A jog is more of a full-body workout than biking ever will be. You can get as much of a workout in less than half the time by jogging versus cycling. And, when it comes to aerobic workouts, distance really doesn't matter as much as how much time is actually spent.