| Rad | wheel bicycle bike cartwheel rad |
| Rada | rada |
| Radix | primitive |
| Radar | radar |
| Radau | racket |
| Radio | radio |
| Radom | radome |
| Radon | radon |
| radio- | radio- |
| rädern | break on the wheel |
| Radium | radium |
| Radius | radius |
| Radler | cyclist shandy |
| Radweg | bicycle path bicycle lane cycle track cycle path bike lane bikeway |
| radeln | ride a bike |
| radial | radial radially |
| Radnabe | hub |
| Radsatz | wheelset |
| Radschm | lapidation |
| Grad | degree order |