Gravity FSX 29 LTD Dual Suspension Mountain Bike
- Size: 21 inches
- Wheel Size: 29 inches
- Minimum User Height: 74 inches
- Maximum Weight Recommendation: 220 pounds
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A budget mail order mountain bike that some riders found solid for learning on dirt trails once tuned, but with enough reports of defects and costly returns that buyers should go in with eyes open.
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ASIN: B08JWVLFQYModel: FSX 29 LTDCategory: Mountain Bikes
Colors Available
Sizes Available
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Overview
The 2025 Gravity FSX 29 LTD is a full suspension mountain bike with 29 inch wheels, a lock out front fork, adjustable rear suspension, disc brakes, and a 21 speed drivetrain, sold as a mail order build rather than an assembled retail bike.
- 29 inch wheels with a lock out front fork
- Adjustable rear suspension for a full suspension ride
- Disc brakes on both wheels
- 21 speed drivetrain using common part sizes
Who it's for
New or younger riders learning on dirt and gravel trails, who are comfortable doing some of their own tuning, are the better fit here. Larger or taller riders, or anyone wanting assurance against needing to pay for return shipping, should weigh the mixed feedback carefully before ordering.
Pros and cons
- Full suspension and lock out fork adapt between pavement and dirt trails
- Uses common part sizes, making replacements easy to source
- Suspension preload handles small obstacles and curbs well once tuned
- Some units arrived with a warped wheel or bent frame part
- Return shipping has cost some buyers several hundred dollars
- Customer service was described as unhelpful when a buyer needed replacement screws
- Heavier riders reported difficulty pedaling uphill
Performance notes
Weld quality was described by one reviewer as chunky, workable for dirt and gravel but not intended for larger drops.
Specifications
| Brand | Quality |
|---|---|
| Model | FSX 29 LTD |
| Dimensions & fit | |
| Size | 21 incheslower than 75% of 49 mountain bikes |
| Wheel Size | 29 incheshigher than 84% of 88 mountain bikes |
| Minimum User Height | 74 incheshigher than 100% of 46 mountain bikes |
| Maximum Weight Recommendation | 220 poundslower than 89% of 48 mountain bikes |
| Capacity & performance | |
| Number Of Speeds | 21 |
| Bicycle Drivetrain Type | Derailleur |
| Bicycle Gear Shifter Type | Trigger |
| Age Range Description | Adult |
| Power & efficiency | |
| Power Source | Pedal |
| Construction & materials | |
| Frame Material Type | Aluminum |
| Wheel Material | Aluminum |
| Seat Material | Synthetic Leather |
| Color | Matt Black |
| Included components | |
| Unit Count | 1 |
| Included Components | Lock |
| Warranty & support | |
| Warranty Type | Limited |
| Other details | |
| Suspension Type | Dual, Front, Rear |
| Brake Style | Disc |
| Bike Type | Mountain Bike |
| Intended Riding Terrain | Mountain Terrain |
| Derailleur Configuration | Front And Rear |
| Skill Level | Intermediate |
| Is Assembly Required | Yes |
| Model Year | 2025 |
| Is Autographed | No |
| Specific Uses For Product | Trail |
| Style Name | Off Road |
| Additional Features | 21 Speed, Aluminum Frame, Dual Suspension |
Closest rivals on specs
Canyon Spectral 5 Mountain Bike- Maximum Weight Recommendation 220 vs 260 pounds (-15%)
Eastern Bikes Alpaka 29 Mountain Bike- Maximum Weight Recommendation 220 vs 300 pounds (-27%)
- Size 21 vs 19 inches (+11%)
Frequently asked questions
Is this mountain bike suited to jumps or drops?
One reviewer described the welds as fine for dirt and gravel trails but not built for larger drops.