Are bumps around the tire sidewalls cause for concern?

I was cleaning the inner sidewalls prior to reinstalling & felt bumps around the whole circumference. Hills & valleys I guess. Some seem a little more hilly than others. Bumps are about 1 1/2in or so. Maybe they are normal & I just never notice them before? I looked online, however am seeing conflicting takes on it....

 

How old are the tires? If it was me I’d change them you never want the sidewalls to have a huge bubble. Definitely bring it in to your tire shop

 

I don’t think you want to be doing any long trips with those

 

It looks perfectly normal to me.

 

Three years. The bubble thing is part of the confusion. I'd do a search for bumps & it kept coming up with single huge bubbles. I think I hit on a couple of close descriptions to mine, but no name for it. It's on all four tires.

 

They're not sidewall air pocket/bubble, thus caused by side wall separation and allowing air in between. It's perfectly normal to have ribs along the sidewall.

 

What @v5ensx said.

See pictures

 

This is the full size pic, contrast bumped up. Couple off the bigger bumps over the AT3. So the inward markings are the ribs I take it & it's normal for them to vary in width & the height of the bumps?

 

Yes, perfectly normal.

 

https://m.tirerack.com/tires/tiretech/techpage.jsp?techid=32

 

Ha-ha! I was just going to post that.... Indentations/undulations. Yet another dose of learning on TW. Thank you all

 

If looks likes this its bad yours looks normal

 

maybe your tires are just overinflated which make the internal ribs of the tire more clearly visible? or its completely normal