Can I put a wire wheel or CBN wheel on a bench grinder?

Yes, and reviewers commonly do both. Wire wheels are popular for rust and paint removal, though community posters note they run louder and can introduce vibration. CBN wheels are a frequent upgrade among woodturners; low-speed 8-inch grinders like the BUCKTOOL models are specifically called out as good CBN platforms because the motor holds speed under the heavier wheel.