Gear slipping issue

[Chippy Dave]

Hi all
I recently bought a new Specialized Allez Elite road bike which was assembled and then packaged and then sent to me.
It has Shimano 105 R7000GS front and rear derailleur, I had to adjust the front derailleur as it was rubbing really badly, but I think I need to make some adjustments to the rear too because it’s slipping higher gears on both the small and large front cog, it’s also I would say noisier than it should be when riding. Can anybody give me some advice on the adjustment on it and how I go about it as I’m new to bike maintenance but I’m practical enough to do it.
Thanks in advance.
Dave

 

[Gunk]

There should be a barrel adjuster on the rear mech, I would start with that. It might only need a slight tweak

 

[ianrauk]

Watch this You Tube vid. Follow the instructions and you should be able to sort your gears.

 

[Chippy Dave]

There should be a barrel adjuster on the rear mech, I would start with that. It might only need a slight tweak

Thanks for the reply, what will this adjust, will I see any visible change?

 

[Chippy Dave]

Watch this You Tube vid. Follow the instructions and you should be able to sort your gears.

Great, thanks ever so much.

 

[Chippy Dave]

Thanks for the link @ianrauk I've managed to sort the gears out properly this afternoon

 

[ianrauk]

Thanks for the link @ianrauk I've managed to sort the gears out properly this afternoon

Good stuff.
That video is the mutts.