Takeaway: The Trek Carback is a serious contender to Garmin in the on-bike radar market. However, while the Carback nears the Varia RTL515’s performance, Trek’s claim of increased radar ...

So it's good to see Garmin bring its dash cam expertise to cyclists in the form of the Garmin Varia RCT715 ... The previous model, the RTL515, had just over twice that – but the RTL515 doesn ...