So being completely new to cycling, I haven't worked on bikes since I was 14ish. 30 years ago.

My wife and I decided to take up cycling, so I purchased a bike and we fixed up a cruiser for her.

What I am wondering is if there is any handlebar height adjustment, or is it normally fixed without using a stem extension?

I have a 2018 Giant Roam Disc 3.

Modern bikes use threadless stems that do not adjust up and down like in the old days. Sometimes there is a spacer or two, and you can reshuffle the spaces to gain a 5-10 mm. The other options are to buy a stem with a higher rise, or to buy a handlebar with a higher rise. The shop you bought your bike from should be able to provide you some help in dialing in the fit.

There are also threadless stem extenders available. Be aware that if you raise the bars significantly (any method)you may find that the cables come up short and need replacement.

If the bike comes with a long extension you can also look at getting a shorter stem.

https://www.amazon.com/Acekit-Alumin...djustable+stem

or do some stretching exercises, and also stretch out before you ride... ;-) ;-)

Can you post a picture of her bike? Many cruisers still have old quill stems with adjustment.

Your Roam has a threadless steerer. The simplest adjustment is to flip the stem upright, if it's not already. The next option is to get an extender or a stem with more angle if you only want a slight adjustment.

Sorry, I should have specified that the question was for my bike. The Giant Roam.

Just got off work and looked at it. The stem is upright already. Maybe I just need to get used to it. I have only went on one ride. :/

This is just the first thing I found when I searched for "adjustable stem." I don't know if it has the correct mounting diameters for your bike, but just to illustrate...

https://www.amazon.com/Zoom-Z-STERN-.../dp/B001V5CF60

These seem to be widely available in a bunch of different brands, lengths, etc. They are found on a lot of hybrids.

The stem in the photo looks like a + 7.5' rise, stems come in many angles from 0 to - or to + try & see what are the options are & can give you, there are some very good write ups on the web, also you could slightly un-clamp the handlebars & rotate them so as to raise the brake hoods so it maybe more comfortable position.

There are of of course adjustable stems where you can set them to what ever position you require, you have to remember if the stem is straight & you raise it say 45' it will shorten the stem length & you may notice this in the steering handling.

Whole recovering from a broken forearm, I used a Ritchie adjustable stem. It cost around $50 as I recall. You might find used ones on Ebay for cheaper. It was pretty solid, and worked well for me. As the above post said, as you swing upward thru the arc, the horizontal distance gets a little shorter.

The other option is getting a riser handle bar. Cost is about ~$40. Most have 20-35mm rise.

What problem are you having that makes you want to get more upright? Wrist and hand pain is frequently related to grip positioning and not necessarily handlebar rise. Handlebar rise is related to back flexibility and core strength.

There is definitely an aspect of getting used to it. Some soreness for the first 2-3 weeks is totally normal.

This is the worst advice I've read on these forums. There should be no pain or soreness in your hand or wrist. I'd advise the OP to ask the moderator to move this thread to the fitting forum.

I never said anything about pain or soreness. I just felt that I would be a bit more comfortable with the handle bars slightly raised.

Maybe it's just because I haven't ridden a bike in 30 years.

My question has been answered, I'll move on to the fitting section.