Gravity
Gravity Fsx 1.0 26 inch Dual Suspension Bike Frame - Aluminum
★★★★★
26 inch
Durable 6061 aluminum dual-suspension 26-inch mountain bike frame with adjustable rear shock included.
$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
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
Brand
Gravity
Model
FSX 1.0
Frame Material
6061 Aluminum, TIG Welded, Hydroformed Tubes
Wheel Size
26 inches
Suspension Type
Full Dual Suspension (CantiBeam Link Single Pivot)
Rear Shock
KS Coilover with Adjustable Preload (Included)
Brake Mount
Disc Brake Only
Head Tube
Standard 1 1/8"
Bottom Bracket
68mm English Threaded
Seatpost Diameter
27.2mm
Seatpost Clamp
31.8mm Quick Release (Included)
Rear Spacing
135mm
Rear Derailleur Hanger
Replaceable
Available Sizes
15", 17", 19", 21"
Pros & Cons
👍 Pros
- Full dual-suspension design with included adjustable KS coil-over rear shock absorbs trail impacts for a smoother ride
- Custom-formed TIG-welded 6061 aluminum construction is lightweight yet strong for trail riding.
- Adjustable KS coilover rear shock is included, saving the cost of purchasing suspension separately.
- Hydroformed 6061 aluminum frame tubes provide a strong yet lightweight foundation for custom builds
- Multiple frame sizes from 15 to 21 inches accommodate a wide range of rider heights
- Replaceable rear derailleur hanger extends the frame's service life after crashes or impacts.
- Available in four sizes (15, 17, 19, 21 inches) for a wide range of rider heights.
- Replaceable rear derailleur hanger extends the frame's lifespan by allowing easy replacement after impacts
- Includes seatpost clamp and headset, reducing the number of additional parts needed to start building
- Standard 135mm rear spacing and 68mm English-threaded bottom bracket ensure broad parts compatibility.
👎 Cons
- 26-inch wheel compatibility limits upgrade options as the industry has largely shifted to 27.5 and 29-inch standards
- Frame only — wheels, fork, drivetrain, brakes, seatpost, and bottom bracket must all be sourced separately.
- Disc brake mounts only, so existing rim brake wheelsets and calipers cannot be used.
- Disc brake mounts only, with no rim brake option for riders who prefer or already own rim brake components
- Bottom bracket, seatpost, fork, wheels, drivetrain, and brakes must all be purchased separately, adding significant cost
- Designed for 26-inch wheels only, limiting compatibility with the now more common 27.5 or 29-inch standards.
- Single-pivot suspension design is simpler and less tunable than multi-link platforms.
- 135mm rear spacing is a standard quick-release dimension that does not support modern thru-axle hubs
- Coil-over rear shock is heavier and less adjustable than air shocks found on higher-end frames
Frequently Asked Questions
Does this frame come with a rear shock included?
Yes, the Gravity FSX 1.0 frame includes a KS coil-over rear shock with adjustable preload, so you can fine-tune the suspension feel right out of the box.
What components are included with the Gravity FSX 1.0 frame?
The frame comes with an adjustable KS coilover rear shock and a 31.8mm quick-release seatpost clamp. The headset, bottom bracket, and seatpost are not included.
What type of brakes does this frame support?
This frame is designed for disc brakes only — it has disc brake mounts but no rim brake bosses.
What wheel size does this frame accept?
This frame is designed specifically for 26-inch wheels, which is a widely available wheel size suitable for trail and recreational mountain biking.
What components are included with the frame and what do I need to buy separately?
The frame comes with an adjustable rear shock, seatpost clamp, and headset. You will need to purchase separately a bottom bracket (68mm English threaded), seatpost (27.2mm), headset, fork, wheels, drivetrain, brakes, and other components to complete the build.
What rear hub spacing does the FSX 1.0 use?
It uses standard 135mm rear spacing, compatible with most 26-inch mountain bike rear wheels.
What frame sizes are available?
The FSX 1.0 is available in 15-inch, 17-inch, 19-inch, and 21-inch sizes to accommodate different rider heights.
What frame sizes are available?
The Gravity FSX 1.0 frame is available in four sizes — 15, 17, 19, and 21 inches — to accommodate a range of rider heights.
Does this frame support rim brakes or only disc brakes?
This frame is disc brake mount only. It does not have provisions for rim brakes, so you will need to use disc brake calipers and rotors.
Is the rear derailleur hanger replaceable?
Yes, the frame features a replaceable rear derailleur hanger, so a bent hanger can be swapped without replacing the entire frame.
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