The Single Speed Invincible is a great first step to becoming an urban fixie bike rider.
Considering a fixie bike for commuting in the city? The Fortified single speed is a great alternative to a fixed gear bike. We make the toughest, more reliable single speed bikes. Riding fixie bikes can be extremely dangerous if you're not an experienced rider. It's important to understand that fixed gear bikes require that the pedals are always moving. With Fortified, get the benefits of a fixie bike without the dangers for fixed gear riding. Forget the days of riding an unreliable single speeds bike that die in the city from flat tires, rust, or theft. Fortified is the only single speed bicycle women and men alike trust to meet the daily needs of a commuter. We pack these bikes with anti theft power from the wheels, to the seat, to the handlebars. Unlike any fixed gear bicycle, for side visibility, the Fortified Invincible has white retro reflective decals that make you shine. The best single speed bikes also need to ride in all road conditions, so we equip Fortified bikes with puncture resistant tires that make easy work of potholes and broken glass.
If your bike is ever stolen, we will send you a replacement in 24 hours. Optional theft protection plan starting as low as $99/year.
Starting at $329
Lightweight Aluminum (23 lbs)
Starting at $549
Disc Brakes Shimano
Lightweight Aluminum (26 lbs)
Starting at $69/Month
If a thief steals your bike
with Fortified Theft Protection,
we'll ship you a new one in 24hrs.
VERIFIED CUSTOMER REVIEWS
The Fortified bike is light and tough. Great for city streets. I feel like I'm flying on the Fortified.
I love the bomb-proof simplicity of this bike. After 6 months, the bike is virtually maintenance free, rides awesome and I know I can lock it up anywhere.
Best city bike I've ever owned. For me, the peace of mind is well worth it.