The Trek 520 gets a refresh, 35 years after it was introduced! - Singletrack World Magazine
520 Disc | Trek Bikes
Trek 520 Disc first ride review - BikeRadar
Stolen 2016 Trek 520 TOURING BIKE
TREK 520 Touring Bicycle Review After 1000+ Kilometers - YouTube
520 | Trek Bikes
2018 Trek 520 Disc - Gravel Bike Database
Trek 520 Disc first ride review - BikeRadar
The New 2018 Trek 920 Off-Road Touring Bike - CyclingAbout.
The Trek 520 Disc Touring Bike, continuation of a legacy - YouTube
520 Disc | Trek Bikes
Trek 520 vs Trek 920 -
2018 Trek 520 Disc – Specs, Comparisons, Reviews – 99 Spokes
Reader's Rig: Lee's Trek 520 - BIKEPACKING.com
Trek 520 Disc Touring Bike - 2016, 57cm | The Pro's Closet
Trek 520 Touring Bike user reviews : 4 out of 5 - 50 reviews - roadbikereview.com
Trek 520 Disc first ride review - BikeRadar
