Different Grips for different needs
I use lock-ons on my suspension bikes because…not sure really mainly as they are already on there I think. I suppose it allows you to color match your bike with bling lock rings maybe 😉
On my rigid bike I use foam grips – because the space taken up by the plastic tube on a lock on grip can be filled with foam and therefor more comfortable.
I only fitted the foam grips last year and the fact that they haven’t budged a mm since fitting (no glue used) despite being my winter bike has left me pondering the point of the lock on ones which I assumed would be more solid. They are heavier and more expensive too!
Also top tip for removing and installing foam grips – lift one end of the grip and stick the rubber pipe from your ghetto lemonade bottle tubeless inflator underneath. Then blast away and watch with satisfaction as the grip fires across the garage (or with a gentle push slides onto the bar). Air is a fantastic lubricant! Takes less time than removing or fitting a lock-on – especially when the bolts are filled with dried mud.