The Fly Sierra frame is one of Fly’s most popular frames. It has some bigger geometry like the chain stay and top tube, but this frame has a shorter stand over. This will provide a good balance between flowy and technical riding. Sierra parts have been Sergio Layos’ signature line for years, and they kill it each year.
✅ – 13.6″ chain stay
✅ – 5 lbs
✅ – drilled for gyro tabs
✅ – Full Chromoly
✅ – Built-in chain tensioner
Price & Weight are comparative to how good the deal is.
Good deal = 5 Star
Bad Deal = 1 Star
Sergio Layos Signature
After another amazing year for Sergio Layos, Fly has only made a few small changes to make his signature frame even better. Sergio has decided to make the move back to a 75° head tube angle, The frame features internal and external gussets, multi-butted and tapered tubing, an Investment Cast seat post clamp with the Horizontal Cut System, removable EBS style brake mounts, and Investment Cast Dropouts with integrated chain tensioners!
Learn about frame sizes here
|MATERIAL: 4130 Chromoly|
|HEAD TUBE ANGLE: 75°|
|SEAT TUBE ANGLE: 71°|
|CHAIN STAY LENGTH: 13.6″|
|BB HEIGHT: 11.5″|
|WHEEL SIZE: 20″|
|STANDOVER HEIGHT: 8.75″|
|DROPOUT SIZE: 14mm|
|HEADSET TYPE: Integrated|
|BB TYPE: Mid|
|BRAKE MOUNTS: Removable|
|GYRO TABS: Drilled|
|WEIGHT: 2.300 kg / 5 lb (21″)|
A: Top Tube Length: 20.6″, 20.8″, 21″ – Learn what size is right for you here.
Good options for medium to tall riders. Make sure you know what size you need.
Check out the BMX Size guide to figure out the right size for you.
B: Chain Stay Length: 13.6″ – Learn About Chain Stays Here
This is a long chain stay. A long chain stay will give riders more control and stability.
But it will make spins harder.
C: Head Tube Angle: 75.º – Learn About Head Tube Angles Here
Steep head tube angles make the bike “snappy” meaning more responsive to fast turns.
A less steep head tube gives you more control.
D: Seat Tube Angle: 71°
E: Bottom Bracket Height: 11.7″
F: Stand over height: 8.75″
This is a medium standover. A medium standover balances responsiveness and control.
Sergio Layos has always killed it and he really deserves this line. The Sierra frame is strong, light, and simple. Designed best for a rider that wants to flow park. Since the specs are aimed at the “flow” aspect of riding, technical tricks will be harder to do.