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Fly Sierra 3 Frame
£369.99
After another amazing year for Sergio Layos, Fly have 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 & external gussets, multi-butted & tapered tubing, an Investment Cast seat post clamp with the Horizontal Cut System, removable EBS style brake mounts & Investment Cast Dropouts with integrated chain tensioners! section Product Specs

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: 2.300kg / 5 lb (21") section Product Highlights Nuetral Geometry for responsiveness & stabilty Great all round frame for all types of riding Multi Butted & Gusseted Tubing For Added Strength Investment Cast Seat Post Clamp Integrated Chain Tensioners To Keep Your Wheel In Place shogun-image-section









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Archived Product
image missing
Fly Sierra 3 Frame
£369.99
After another amazing year for Sergio Layos, Fly have 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 & external gussets, multi-butted & tapered tubing, an Investment Cast seat post clamp with the Horizontal Cut System, removable EBS style brake mounts & Investment Cast Dropouts with integrated chain tensioners! section Product Specs

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: 2.300kg / 5 lb (21") section Product Highlights Nuetral Geometry for responsiveness & stabilty Great all round frame for all types of riding Multi Butted & Gusseted Tubing For Added Strength Investment Cast Seat Post Clamp Integrated Chain Tensioners To Keep Your Wheel In Place shogun-image-section









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Available
image missing
Fly Sierra 3 Frame
£369.99
After another amazing year for Sergio Layos, Fly have 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 & external gussets, multi-butted & tapered tubing, an Investment Cast seat post clamp with the Horizontal Cut System, removable EBS style brake mounts & Investment Cast Dropouts with integrated chain tensioners! section Product Specs

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: 2.300kg / 5 lb (21") section Product Highlights Nuetral Geometry for responsiveness & stabilty Great all round frame for all types of riding Multi Butted & Gusseted Tubing For Added Strength Investment Cast Seat Post Clamp Integrated Chain Tensioners To Keep Your Wheel In Place shogun-image-section









...
Available
image missing
Fly Sierra 3 Frame
£369.99
After another amazing year for Sergio Layos, Fly have 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 & external gussets, multi-butted & tapered tubing, an Investment Cast seat post clamp with the Horizontal Cut System, removable EBS style brake mounts & Investment Cast Dropouts with integrated chain tensioners! section Product Specs

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: 2.300kg / 5 lb (21") section Product Highlights Nuetral Geometry for responsiveness & stabilty Great all round frame for all types of riding Multi Butted & Gusseted Tubing For Added Strength Investment Cast Seat Post Clamp Integrated Chain Tensioners To Keep Your Wheel In Place shogun-image-section









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Available
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Fly Sierra 3 Frame
Flat Black / 21"
£359.99
After another amazing year for Sergio Layos, Fly have 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 & external gussets, multi-butted & tapered tubing, an Investment Cast seat post clamp with the Horizontal Cut System, removable EBS style brake mounts & Investment Cast Dropouts with integrated chain tensioners! section Product Specs
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: 5lbs section Product Highlights Neutral Geometry for responsiveness & stability Great all round frame for all types of riding High-quality Chromoly construction Gusseted tubing for added strength Built in chain tensioners shogun-image-section




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Available
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Fly Sierra Frame
£255.99
BMX Legend & Battle of Hastings regular  Sergio Layos' signature frame. Replacing the  Trueno & built for his type of riding style specifically, the brand new Sierra frame, from the ground up is built for speed & style, with classic looks, .. .. ...
Archived Product
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Fly Sierra Seat
£31.99
Sergio is very specifc about his bike, unlike other guys the smallest details are really important to him, everything has to be tight, no rattles & especially how his bike look’s. One of the key parts that he’s super particular about has alw.. .. ...
Archived Product
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Fly Sierra Seat
£31.99
Sergio is very specifc about his bike, unlike other guys the smallest details are really important to him, everything has to be tight, no rattles & especially how his bike look’s. One of the key parts that he’s super particular about has always been his seat, the look, the angle & design. So Fly gave Sergio the opportunity to design his own, with a refined slim foam shape & clean look we bring you the Sergio Layos Sierra signature seat, that functions as amazingly as it looks. ...
Available
Fly Sion BMX Bike 2018
Fly Sion BMX Bike 2018
£479.99
The Sion BMX from Fly is inspired by team rider Courage Adams & is fully loaded with great parts & innoation which we hae come to know & love from Fly. The Sion is built around a responsive full 4130 frame & is laoded with Fly signature parts like the Roey 2 Stem, Devon Smilie Tripod seat, Fuego tires & Ruben pedals. The rest of the parts are taken care of by Fly & Trebol & nothing has been over-looked
- theres even 2x Nylon hub guards. section Product Specs FRAME

Material: Full 4130 Chromoly WHEEL

Size: 20" TOP TUBE LENGTH: 21" CHAIN STAY LENGTH: TBC HEADTUBE ANGLE: TBC SEAT TUBE ANGLE: TBC FORKS: BARS: Full Chromoly STEM: Fly Roey 2 Alloy Top Load HEADSET: Sealed Integrated BRAKE MOUNTS: Removable BRAKES: Fly Springhanger U-Brake FRONT HUB: Trebol Bueno Sealed FRONT RIM: Fly Pyramide Double Wall REAR HUB: Trebol Sealed Cassette 9t REAR RIM: Fly Pyramide Double Wall TYRES: Fly Fuego 2.3 SPROCKET: Fly Tractor 25t CRANKS: Trebol 3pc 4130 Chromoly 175mm BB: Sealed Mid PEDALS: Ruben Graphite SEAT: Fly Devon 2 Tripod GEARING: 25/9 WEIGHT: 24.9lbs / 11.3 Kgs




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Available
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Fly Sion BMX Bike 2018
Flat Trans Dark Blue
£479.99
The Sion BMX from Fly is inspired by team rider Courage Adams & is fully loaded with great parts & innoation which we hae come to know & love from Fly. The Sion is built around a responsive full 4130 frame & is laoded with Fly signature parts like the Roey 2 Stem, Devon Smilie Tripod seat, Fuego tires & Ruben pedals. The rest of the parts are taken care of by Fly & Trebol & nothing has been over-looked
- theres even 2x Nylon hub guards. section Product Specs FRAME
Material:  Full 4130 Chromoly WHEEL
Size: 20" TOP TUBE LENGTH: 21" CHAIN STAY LENGTH: TBC HEADTUBE ANGLE: TBC SEAT TUBE ANGLE: TBC FORKS:  BARS:  Full Chromoly STEM:  Fly Roey 2 Alloy Top Load HEADSET:  Sealed Integrated BRAKE MOUNTS:  Removable BRAKES:  Fly Springhanger U-Brake FRONT HUB:  Trebol Bueno Sealed FRONT RIM:  Fly Pyramide Double Wall REAR HUB:  Trebol Sealed Cassette 9t REAR RIM:  Fly Pyramide Double Wall TYRES:  Fly Fuego 2.3 SPROCKET:  Fly Tractor 25t CRANKS:  Trebol 3pc 4130 Chromoly 175mm BB:  Sealed Mid PEDALS:  Ruben Graphite SEAT:  Fly Devon 2 Tripod GEARING: 25/9 WEIGHT: 24.9lbs / 11.3 Kgs


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Available

Fly Sierra 3 Seat Brown

When it comes to the look of the bike, Sergio Layos is very specific about his setup and likes to focus on the details! The Sierra Tripod seat is key to that look. With a slim, ergonomic design, it really helps give a bike a clean and simple look with a sewn flybikes logo on the back! section Product Specs TYPE: Tripod PADDING: Slim WEIGHT: 217g
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    • Availability: In Stock
    • Supplier: Sourcebmx
    • SKU: 40878156218479
    Availability: In Stock
    £39.99
    cycling BMX Seats
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    Product Description

    When it comes to the look of the bike, Sergio Layos is very specific about his setup & likes to focus on the details! The Sierra Tripod seat is key to that look. With a slim, ergonomic design, it really helps give a bike a clean & simple look with a sewn flybikes logo on the back! section Product Specs TYPE:  Tripod PADDING:  Slim WEIGHT: 217g

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    Intelligent Comparison

    Available
    Fly Aire Seat Brown
    Fly Aire Seat Brown Sourcebmx
    £39.99
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    Fly Sierra 2 Seat Sourcebmx
    £31.99
    Available
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    Fly Sierra 2 Seat Sourcebmx
    £31.99
    Available
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    Fly Sierra Seat Sourcebmx
    £31.99

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    Jargon Buster

    Ergonomic - A specific design to fit the purpose of the user
    Tripod - A three legged device for supporting an object - commonly a camera.
    Brown - A colour, commonly associated with earth or soil
    Key - A physical or virtual device or code used for opening something
    weight - A measure of the force applied on an object by gravity. Measured metric in grams and kilos or imperial in lbs and oz
    Logo - A symbol that is usually associated with a brand or product.
    Simple - Basic, easy no difficulty in understanding.
    Design - A drawing or styles that shows the look and functionality of something before its made.

    Supplier Information

    Sourcebmx
    Ride in style with Source BMX (https://www.sourcebmx.com/). Explore a vast selection of BMX bikes, parts, accessories, and apparel for riders of all levels. With top brands and expert advice, Source BMX ensures you have everything you need for your next session. Elevate your BMX experience and unleash your passion for riding with Source BMX.
    Page Updated: 2026-01-29 13:55:46

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