Gravity

Gravity FSX 1.0 Shimano Acera Dual Suspension Mountain Bike

4.0 (97 reviews)

Built for riders who want real trail capability and front-to-rear suspension without breaking the bank on their first serious mountain bike.

$549.00*
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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

Drop onto a rooted doubletrack with the Gravity FSX 1.0 and the dual suspension setup immediately justifies itself — where a hardtail would transmit every root and embedded rock straight through your wrists and lower back, the coil-over rear shock and adjustable front fork absorb the trail's rough edges and keep your wheels tracking the ground. For riders graduating from paved paths or basic hybrid bikes who want to explore proper dirt terrain, the FSX 1.0 opens up trail riding that would otherwise feel punishing or technically overwhelming. The 24-speed Shimano Acera drivetrain gives you the gear range to spin up loose climbs and pedal out efficiently on flat sections, while the Tektro disc brakes provide reliable stopping confidence on steep, wet descents where a rainstorm can otherwise turn a trail ride into a white-knuckle experience.

The aluminum frame is the FSX 1.0's most durable asset — it won't corrode after seasons of wet riding and holds up to the physical stress of trail use better than the budget suspension components around it. Single-pivot rear suspension design keeps the linkage simple and the maintenance requirements manageable, though you'll want to inspect pivot bearings and shock hardware at the start and end of each riding season. The quick-release wheel system makes trail access logistics easy when you're loading up for a day trip, and the adjustable suspension allows basic setup tuning as you develop a feel for what the bike needs under your specific weight and riding style. It won't keep pace with a purpose-built trail bike at double the price, but as a capable platform for learning off-road riding technique, the FSX 1.0 delivers a genuinely trail-worthy experience.

Key Features

Strong and Durable

Easy to Use Shifters

Adjustable Suspension - Front and Rear!

Assembly Required

Quick Release Wheels - Front and Rear

Specifications

Frame
Aluminum with Single Pivot Technology
Rear Suspension
Adjustable Rear Coil-Over Cartridge Shock
Front Suspension
Adjustable Front Shock Fork
Drivetrain
24-Speed Shimano Acera
Brakes
Tektro Novello Disc Brakes
Wheel Size
26 inches
Wheel Release
Quick Release Front and Rear

Pros & Cons

👍 Pros

  • Full dual suspension front and rear absorbs trail chatter and root impacts that would rattle a hardtail rider off-line on technical descents.
  • The 24-speed Shimano Acera drivetrain provides a wide gear range that keeps climbing manageable on long ascents and steep fire road grades.
  • Tektro Novello disc brakes deliver consistent stopping power in wet and muddy conditions where rim brakes struggle to bite reliably.
  • The aluminum frame keeps weight reasonable for an entry-level full-suspension design, making the bike manageable to maneuver on switchbacks.
  • Quick-release front and rear wheels simplify loading into a car trunk or van for trail access — no tools needed for removal.

👎 Cons

  • The entry-level suspension components absorb small to moderate trail impacts well but can feel vague and undamped on harder hits, limiting confidence on aggressive terrain.
  • At 26-inch wheel size, the FSX 1.0 predates the 27.5 and 29-inch wheel standards that roll over trail obstacles more easily — a real limitation on rocky or rooted terrain.
  • Acera-level components require more frequent cleaning and adjustment in muddy conditions than mid-range Alivio or Deore groups, adding maintenance time after hard rides.
  • The dual-suspension design adds weight compared to a hardtail at the same price point, which you feel on long climbs where every extra pound costs effort.
  • Stock saddle and grips are functional but uncomfortable on rides beyond two hours — most riders replace them after the first few outings.

Frequently Asked Questions

The FSX 1.0 is best matched to moderate cross-country and trail riding — rooted fire roads, packed dirt singletrack, and mild technical sections. The entry-level suspension components handle light to moderate hits well, but aggressive rock gardens or large drops will push the frame and shock beyond their comfortable operating range.
Partial assembly is required — typically front wheel attachment, handlebar installation, saddle adjustment, and brake/derailleur calibration. A basic hex key set and a bike stand help, but the job is manageable without a full workshop. Expect 30–60 minutes and a final check of brake alignment and gear indexing before your first ride.
Acera is Shimano's entry-level mountain groupset, and with regular cleaning and cable tension adjustments it shifts reliably through a full season. After sustained exposure to mud and wet conditions, cables and housing wear faster at this tier than on higher-spec drivetrains — budget for occasional cable replacement if you ride in mixed weather consistently.
The rear coil-over cartridge shock and front fork are both adjustable, which allows basic preload tuning for different rider weights. This is a mechanical adjustment, not air-pressure tuning, so the range is more limited than higher-end suspension — lighter or heavier riders at the extremes of the weight range may find the ride feel either too stiff or too plush.
Quick-release skewers allow the wheels to be removed without tools, which is convenient for transport but means a standard frame lock alone doesn't secure the wheels. If you're locking the bike anywhere public, run a cable through both wheels and the frame, or swap the quick releases for bolt-on axle nuts.