Mason 300

Best bike lock I've owned!

I live in Portland OR and exclusively use an e-bike to get around, so I needed something TOUGH and easy to use. The Mason 300 more than exceeded my expectations! The locking mechanism is incredibly smooth, the size is great with my fat tires, and I feel safe parking my bike outside when running errands :D

Great D-lock for Aventon Aventure

I recently purchased an Aventon Aventure e-bike for daily commuting, and use a Mason 300 D-lock in combination with Kohlburg Alcatraz 5' 13mm chain lock for two SS diamond-rated layers of security. The geometry of Aventon Aventure requires a large D-lock to fit through the frame, fat tires, and a bike rack, and the Mason 300 works great, meeting both length and width requirements to provide multiple locking alternatives. The extra $12 for the lock mount is totally worth it, and I attached mine to the front fork. Mason 300 is a winner.

A very good lock!

I use it for my e_bike, feel very safe with this lock! It is big and wide! I have attached it to my front fork for carrying around with the additional attachment system, and it's working really well! Thank you!