2021 ROCKRIDER 27.5" Full Suspension Mountain Bike ST 540 S - Specs, Reviews, Images - Mountain Bike Database
B'TWIN Rockrider 540s full suspension electric mountain bike. Converted for off-road use, using a high performance Bafang BBSHD mid-drive electric motor... | By Ebike Choices | Facebook
BTWIN RockRider 540S added a new photo. - BTWIN RockRider 540S
Testing the Rockrider MTB ST 540 s | Biking - YouTube