Biky Air 20 S7 (7 Speed)

Yes: the Biky Air 20 S7 fits 5, 6, 7 and 8 year olds who are 43 to 51 inches tall with a 19.5 to 23.5 inch inseam. The seat starts at 21.5 inches, so both feet reach the ground at a stop. From 49 inches the Biky Air 24 S7 also fits and gives more room to grow. Both have seven gears, so the question is wheel size: the 20 inch wheel is easier to handle and the 24 inch rolls better over distance. Measure the inseam first with the Biky Finder.

The Biky Air 20 S7 has two Tektro hand brakes, front and rear, and the lever needs 1.1 kgf (10.8 N) to engage the pads and 1.2 kgf (11.8 N) at full squeeze. Biky measured that with a hanging scale at the lever tip, October 2026, one bike each. The levers are short-reach alloy, sized for small hands. Reviews that mention a single rear brake describe an earlier build. There is no coaster brake, so the wheel freewheels and the child stops with the hands.

The Biky Air 20 S7 fits a 19.5 to 23.5 inch inseam, and the seat adjusts from 21.5 to 28 inches with a quick-release clamp, no tools. Measure the inseam: the child stands against a wall without shoes, you put a book between the legs, and you measure from the floor to the top of the book. Start with the seat low enough that both feet sit flat on the ground. If the child falls between two models, the smaller wheel is easier to handle and the larger one gives room to grow.

The Biky Air 20 S7 arrives partly assembled, and an adult needs about 5 minutes: mount the handlebar (4 mm hex, 6 Nm), attach the front wheel, install the pedals and clip on the reflectors. The box holds the pedals marked R and L, a white front reflector, a red rear reflector and the 4, 5 and 6 mm hex keys you need. A kickstand is added on request, as a gift: write to info@bikybikes.com when you order or after delivery and we send one at no charge. Lights are not included, though the rims and the tire sidewalls are reflective. You pick the color at checkout: Candy Cane, Sunbeam, Olive Pop or the Limited Edition, four colors in all.

Orders for the Biky Air 20 S7 ship the same or the next business day and usually arrive in 3 to 5 business days, with complimentary standard ground shipping to the 48 contiguous states. 2-Day and Overnight are available at checkout at the carrier's rate, and shipping to Alaska, Hawaii and Puerto Rico is $49 per order. You have 90 days from delivery to return the bike: email info@bikybikes.com first for the return address, and the refund goes back to the original payment method within 3 to 5 business days of the return arriving. Return shipping is on us: we email you a prepaid label.

The Biky Air 20 S7 adds seven gears, a MicroShift grip shifter with a gear indicator and a quick-release front wheel that comes off for the car. Both bikes fit the same rider, 43 to 51 inches tall with a 19.5 to 23.5 inch inseam. The S7 weighs 16.3 lb (7.3 kg) without pedals against 13.8 lb (6.2 kg) for the single speed, and it costs $589 against $499. Take the S7 if your rides include hills or distance, and the single speed if the riding is flat.

Partly, the Biky Air 20 S7 is a 7-speed bike with a rear derailleur, so the chain runs open like on other geared bikes. The front chainring is solid, with no cut-outs that could pinch a finger, and the cables run inside the frame. For a fully enclosed chain choose the single speed Biky Air 20, which has a Hebie Chainglider around the whole chain.

No. The Biky Air 20 S7 ships with a freewheel and two Tektro hand brakes, front and rear, with short-reach alloy levers that need 1.1 kgf (10.8 N) to engage. The child brakes with the hands from the first ride and can pedal backward to reset the pedals, and there is nothing to remove or convert later.