Gravity

Gravity Fsx 1.0 26" Full Suspension Bike Frame

Name: Gravity Fsx 1.0 26" Full Suspension Bike Frame
Brand: Gravity
SKU: Fsx 1.0

★★★★★4.7 (16 reviews)

Build your own full-suspension mountain bike with this 26-inch aluminum frame featuring an adjustable rear shock and disc brake mounts.

$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 26-inch full-suspension mountain bike frame designed for riders who prefer to select and assemble their own components. Built from custom-formed, TIG-welded 6061 aluminum with hydroformed tubes on the front triangle, the frame balances durability with reasonable weight for a budget-oriented platform. The CantiBeam link single-pivot rear suspension works with the included KS coilover rear shock, which features adjustable preload so riders can tune the feel to their weight and riding style.

Practical touches include disc brake-only mounts for modern stopping power, a replaceable rear derailleur hanger to save the frame from trail damage, and standard 135mm rear dropout spacing that works with most quick-release mountain bike wheels. The 68mm English-threaded bottom bracket shell accepts widely available cranksets, keeping build options flexible. Available in four sizes from 15 to 21 inches, the FSX 1.0 frame is a straightforward foundation for assembling a casual trail or recreational mountain bike, though riders seeking lighter weight or larger wheel compatibility may want to look at higher-end options.

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

TIG Welded 6061 Aluminum with Hydroformed Tubes

Suspension Type

CantiBeam Link Single Pivot Full Suspension

Rear Shock

KS Coilover with Adjustable Preload (Included)

Wheel Size

26 Inches

Brake Mount

Disc Brake Only

Bottom Bracket

68mm English Threaded

Seatpost Diameter

27.2mm

Seatpost Clamp

31.8mm Quick Release (Included)

Headset

Standard 1 1/8" (Included)

Rear Spacing

135mm

Rear Derailleur Hanger

Replaceable

Available Sizes

15, 17, 19, 21 Inches

Color

Gloss Black

Weight

45 Pounds

Pros & Cons

👍 Pros

Full dual-suspension design with adjustable KS coilover rear shock included
6061 aluminum construction with hydroformed tubes keeps the frame lightweight and strong
Standard 135mm rear spacing and 68mm BSA bottom bracket ensure broad component compatibility
Available in four frame sizes to fit a wide range of riders
Replaceable rear derailleur hanger simplifies repair after trail impacts

👎 Cons

Fork is not included, adding significant cost to a complete build
Listed weight of 45 pounds for the frame package is heavy compared to many competitors
Only compatible with 26-inch wheels, which have become less common as the industry has shifted to 27.5 and 29-inch standards
Single-pivot suspension design offers less pedaling efficiency than more advanced linkage systems

Frequently Asked Questions

What components are included with this frame?

The frame comes with an adjustable KS coilover rear shock with preload adjustment, a 31.8mm quick-release seatpost clamp, and a standard 1 1/8" headset. Bottom bracket, seatpost, fork, and drivetrain components are sold separately.

What sizes are available for this frame?

The Gravity FSX 1.0 frame is available in 15, 17, 19, and 21-inch sizes to accommodate a range of rider heights.

Does this frame support rim brakes or only disc brakes?

This frame is designed for disc brakes only. There are no rim brake mounts, so you will need to use disc brake calipers and rotors.

What bottom bracket standard does this frame use?

It uses a 68mm English-threaded (BSA) bottom bracket shell, which is compatible with a wide range of commonly available cranksets and bottom brackets.

What rear hub spacing does this frame require?

The frame uses 135mm rear spacing, which is the standard for most mountain bike quick-release rear hubs.