Gravity Fsx 1.0 26-Inch Full Suspension Mountain Bike Frame — main product image

Gravity Fsx 1.0 26-Inch Full Suspension Mountain Bike Frame

Gravity

Gravity Fsx 1.0 26-Inch Full Suspension Mountain Bike Frame

Name: Gravity Fsx 1.0 26-Inch Full Suspension Mountain Bike Frame
Brand: Gravity
SKU: Fsx 1.0

★★★★★4.7 (17 reviews)

Build your dream trail rig with this affordable 26-inch full suspension aluminum mountain bike frame featuring an adjustable coilover shock.

$129.95*

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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Gravity FSX 1.0 is a full suspension mountain bike frame designed for riders who want to build up a custom 26-inch trail bike without breaking the bank. Its front triangle is constructed from custom-formed, TIG-welded 6061 aluminum with hydroformed tubes, paired with a CantiBeam link single-pivot rear suspension layout. The frame comes with a KS CoilOver rear shock featuring adjustable preload, allowing riders to tune the suspension feel to their weight and riding style right out of the box.

Practical touches like a replaceable rear derailleur hanger, included headset, and 31.8mm quick-release seatpost clamp reduce the number of additional parts needed for a complete build. The frame accepts only disc brakes and uses standard specifications throughout — 68mm English threaded bottom bracket, 1 1/8-inch head tube, 27.2mm seatpost, and 135mm rear dropout spacing — making it easy to source compatible components from most major brands. While the 26-inch wheel format and single-pivot suspension place this frame in the entry-level category, it offers a viable foundation for a recreational trail bike build at an accessible price point.

Key Features

Disc Brake Mounts

Replaceable Rear Deraileur Hanger

Adjustable Rear Shock Included

135mm Rear Spacing

Seatpost Clamp Included

Headset Included

Quality Aluminum Frame!

Specifications

Frame Material

6061 Aluminum, TIG Welded, Hydroformed Tubes

Wheel Size

26 inches

Suspension Type

CantiBeam Link Single Pivot Full Suspension

Rear Shock

KS CoilOver with Adjustable Preload (Included)

Brake Mount

Disc Brake Only

Headset

Standard 1 1/8" (Included)

Bottom Bracket

68mm English Threaded (Not Included)

Seatpost Diameter

27.2mm

Seatpost Clamp

31.8mm Quick Release (Included)

Rear Spacing

135mm

Item Weight

45 lbs

Pros & Cons

👍 Pros

Includes a KS CoilOver rear shock with adjustable preload, saving the cost of buying one separately.
Hydroformed 6061 aluminum front triangle keeps weight reasonable while maintaining stiffness.
Replaceable rear derailleur hanger means a crash won't require replacing the entire frame.
Headset and seatpost clamp included out of the box reduce total build cost.
Standard 135mm rear spacing and 68mm bottom bracket shell make sourcing compatible parts straightforward.

👎 Cons

Limited to 26-inch wheels, which have become less common as the industry has shifted to larger wheel sizes.
Listed item weight of 45 pounds suggests a heavy frame, which will affect climbing performance.
Single-pivot suspension design offers less pedaling efficiency and bump sensitivity compared to multi-link designs.
No information provided on frame sizing options, which may limit fit for different rider heights.
Does not include a fork, bottom bracket, or seatpost, so total build cost adds up quickly.

Frequently Asked Questions

What wheel size does the Gravity FSX 1.0 frame support?

This frame is designed for 26-inch wheels only. It is not compatible with 27.5-inch or 29-inch wheels.

Does the frame come with a rear shock?

Yes, a KS CoilOver rear shock with adjustable preload is included. A headset and seatpost clamp are also included.

What components do I still need to purchase separately to complete a build?

You will need a bottom bracket (68mm English threaded), a 27.2mm seatpost, fork, crankset, wheels, drivetrain, brakes, and handlebars/stem at minimum.

What type of brakes are compatible with this frame?

The frame is disc brake only — it has disc brake mounts but no rim brake bosses, so you must use disc brakes.

What is the rear axle spacing on this frame?

The rear dropout spacing is 135mm, which is the standard for most 26-inch mountain bike hubs.