Ryobi’s R18AG is aimed squarely at DIY users who want cordless convenience without trade-tool pricing. Its biggest advantage is compatibility with the extensive ONE+ battery system.
Pros and cons
Affordable way into cordless grinding
Works with all Ryobi ONE+ batteries
Simple controls
Three-position side handle
Brushed motor is less efficient
Slower on heavy cuts than premium models
Key features
18V ONE+ battery platform
115mm disc capacity
Three-position auxiliary handle
Spindle lock
Tool-free guard adjustment
GripZone overmould
Performance and handling
The Ryobi is effective for cutting bolts, trimming metal and occasional surface preparation. It is less suited to continuous heavy grinding, where brushless trade models maintain speed more confidently.
The three-position handle is useful for left- or right-handed work. A medium battery gives a good balance between runtime and manageable weight.
Who is it for?
It is best for home renovators and existing ONE+ owners who need a grinder for occasional rather than daily use.
Final verdict
The R18AG is a practical budget grinder. It cannot match professional models under sustained load, but offers good DIY value and battery-system convenience.