Garmin Varia Cycling Rearview Radars: RTL510 vs. RTL515

Garmin recently released RTL515 Varia Cycling Rearview Radar. So, how does the new version compare against the older RTL510? You can find out in this comparison guide. Quick Summary The main difference between the Garmin Varia RTL510 Cycling Rearview Radar and Garmin Varia RTL515 Cycling Rearview Radar is that the RTL515 supports smartphones. In addition … Read more