Bicycle
700C Diamond 8-Speed Own the city.
A complete commuter built for the urban grind — steel-frame reliability, front and rear racks, fenders, and a wide-ratio drivetrain ready for hills or the sprint to the train.
The easiest way to get on a bike again
Three decades of refining one idea: a step-through frame that feels like an invitation, not an obstacle.
The lowest step-through on the market
Just six inches of top tube means no leg-swing, no balance check. Confidence on, confidence off — every single time.
Aluminum frame, built to last
Oversized tubing keeps the bike stiff and responsive — light enough to lift onto a rack, tough enough to ride for years.
Park-ready out of the box
Fenders, kickstand, chain guard, and a comfort saddle come standard — everything you need to ride home from the shop.
Every part, no surprises
- Frame
- Hi-Ten Steel with Cro-Mo Seat Tube
- Fork
- Steel Unicrown
- Rims
- Weinmann Double wall aluminum, black with CNC wall
- Tires
- 700 x 32C
- Gear
- Shimano Altus 8-speed
- Stem
- Aluminum
- Handlebar
- Aluminum
- Brake
- Front and rear aluminum Tektro V-brakes
- Weight
- 33
- Standard
- Front and rear racks, fenders, kickstand
- Package
- 45 lbs, 54 x 8 x 28 inches
Complete your ride
View all
Ride it at a Biria dealer near you
Test ride in person, get fitted by a pro, and pick up your bike fully assembled and tuned.
Find a dealerFrequently asked questions
Bikes ship 85% assembled. We strongly recommend final assembly by a certified bike shop — we'll cover the cost at any participating Biria dealer.
You have 30 days to return for a refund as long as the bike comes back brand new and unused. A 15% restocking fee may apply, and you cover return shipping.
The defining feature is the low step-through top tube — among the lowest on the market. Most "step-through" bikes still have an 8–12" top tube that requires a leg-swing.
The acoustic frames aren't designed for an e-bike conversion. If you want pedal assist, see our electric Easy Boarding series.
Limited lifetime warranty on the frame for the original owner. Components (drivetrain, brakes, wheels) are covered for one year from the purchase date.
