AVASTA Earth 26 27.5 inch Mountain Bike with 21-Speed
- Mountain Bike
- 27.5 inches
- Pedal
- Aluminum
- More reviewed than 69%
Assembly is the strong point here, backed by responsive customer support when parts arrive damaged, though this is still an entry-level mountain bike rather than a trail-ready one.
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How it ranks among the 95 mountain bikes we track
4.2★ across 162 Amazon ratings, Bayesian-smoothed toward the category average.
162 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 95 mountain bikes we track - how the scorecard works · full mountain bikes data report. Confidence: medium - useful but incomplete evidence.Last refreshed Jun 21, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Avasta's Earth model ships 75 percent pre-assembled, pairing a 26 or 27.5 inch wheel option with an aluminum frame, a switchable suspension fork, 21-speed gearing, and dual disc brakes. An included instructional video walks through the remaining setup.
Multiple reviewers highlight clear, legible assembly instructions and a smooth out-of-box gear setup as strengths at this price point, while at least one buyer received a bike with shipping damage and a broken sprocket cover. The switchable suspension fork gives riders the option to lock it out on pavement.
- 26 or 27.5 inch wheel options
- Aluminum alloy frame and rims
- 21-speed drivetrain with dual disc brakes
- Ships 75 percent pre-assembled with installation video
Who it's for
Reasonable for teens and adults wanting a first mountain bike for casual trails and neighborhood riding at a low price point. Not a fit for buyers who need assurance against shipping damage or heavier-duty components for serious trail riding.
What buyers say
From Amazon customer reviews.
Buyers consistently praised how easy assembly was thanks to clear instructions and pre-tuned gearing, and one reviewer highlighted responsive customer service after a missing part. The negative reports centered on shipping damage, including a broken sprocket cover on one unit, and a suspension fork that one rider felt needed stiffer shocks.
Strengths and trade-offs
Drawn from this product's published specifications.
- Clear, well-illustrated assembly instructions
- Gears and rear brakes reportedly arrive pre-tuned
- Aluminum frame keeps the bike relatively light
- Customer service replaced missing or broken parts promptly for one buyer
- At least one unit arrived with shipping damage and a broken sprocket cover
- Suspension fork could use stiffer shocks per one reviewer
- Front handle assembly instructions were confusing for one buyer despite the video
Performance notes
The 21-speed derailleur and disc brakes reportedly arrive pre-tuned or close to it, with most buyers only needing to remove slack from the front brake cable and adjust the front derailleur slightly. The switchable suspension fork lets riders lock it for pavement or open it for trail bumps, though one reviewer suggested stiffer shocks would improve the ride.
Specifications
| Brand | Avasta |
|---|---|
| Dimensions & fit | |
| Wheel Size | 27.5 inches |
| Size | 27.5 inches |
| Capacity & performance | |
| Bicycle Gear Shifter Type | Trigger |
| Bicycle Drivetrain Type | Derailleur |
| Number Of Speeds | 21 |
| Age Range Description | Adult |
| Power & efficiency | |
| Power Source | Pedal |
| Construction & materials | |
| Frame Material Type | Aluminum |
| Wheel Material | Aluminum |
| Seat Material | Polyurethane (PU) |
| Color | Gray |
| Included components | |
| Unit Count | 1 |
| Included Components | Bell, Reflectors, Tool Kit |
| Other details | |
| Suspension Type | Front |
| Bike Type | Mountain Bike |
| Number of Handles | 2 |
| Is Assembly Required | Yes |
| Is Autographed | No |
| Skill Level | Intermediate |
| Theme | Bicycle |
| Brake Style | Disc |
| Additional Features | Optional Quick-Release All-Terrain Tires |
| Specific Uses For Product | Mountain Biking |
| Derailleur Configuration | Front and Rear |
| Style Name | Mountain |
| Intended Riding Terrain | Mountain Terrain, Unpaved Trails |
Other Avasta mountain bikes
How it compares
This product against the closest alternatives we track in mountain bikes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| AVASTA Earth 26 27.5 inch Mountain Bike with 21-SpeedThis product | 4.2 / 5 | 162 | 3.8 / 5 |
| Mongoose Dolomite Fat Tire Mountain Bike | 4.4 / 5 | 2,281 | 4.1 / 5 |
| Mongoose Malus Mens and Women Fat Tire Mountain BikeBrand | 4.4 / 5 | 1,500 | 4.1 / 5 |
| Schwinn Bonafide Men and Women Mountain BikeSchwinn | 4.2 / 5 | 667 | 4.1 / 5 |
| WEIZE Mountain Bike, 24 26 27.5 inch Outdoor MTB Bicycle, 6/18-Speed High-Carbon Steel…Weize | 4.1 / 5 | 599 | 4.0 / 5 |
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Questions about the Avasta mountain bikes
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How much assembly is required?
The bike ships about 75 percent pre-assembled, with buyers typically completing the front wheel, pedals, bars, and seat.
Do the gears need adjustment out of the box?
Most reviewers say the rear gearing arrives pre-tuned, with only minor front derailleur or brake cable adjustment needed.
What wheel sizes are available?
It comes in 26 inch or 27.5 inch wheel options with matching all-terrain tires.