Gravity Area 51 Adult BMX Bike Aluminum Frame Single Speed Cruiser
- BMX Bike
- 19 inches
- 200 pounds
- Pedal
- Better rated than 94%
A light aluminum-frame single-speed BMX cruiser with a chromoly fork, built for straightforward riding rather than technical gearing.
As an Amazon Associate, ProductDome may earn a commission from qualifying purchases made through links on this page.
Colors Available
Need a different one? Pick on Amazon →
How it ranks among the 21 bmx bikes we track
5.0★ across 2 Amazon ratings, Bayesian-smoothed toward the category average.
2 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 21 bmx bikes we track - how the scorecard works · full bmx bikes data report. Confidence: limited - limited rating history.Last refreshed Jun 21, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A single-speed BMX cruiser from Gravity with an aluminum frame, three-piece cranks, a straight-blade chromoly fork, and 26-inch aluminum rims. It ships partially assembled in two frame sizes.
The aluminum frame and three-piece crank setup are what separate this from a department-store single speed, aimed at riders who want a lighter, sturdier BMX cruiser without a full drivetrain to maintain. Final assembly and tuning are needed before the first ride.
- Aluminum frame construction
- Straight-blade chromoly fork
- 26-inch aluminum rims
- Available in two sizes
Who it's for
Riders wanting a simple, light single-speed BMX cruiser for street or park riding rather than a multi-gear bike. Buyers uncomfortable doing final bike assembly and tuning themselves should budget for a shop to finish setup.
What buyers say
From Amazon customer reviews.
The one review on record described the bike as light, roughly 20 pounds versus a 40 pound steel bike for comparison, with wide handlebars, chunky tires, and a paint job the reviewer liked. Assembly was called relatively easy, and the reviewer noted the bike arrived bigger than expected.
Strengths and trade-offs
Drawn from this product's published specifications.
- Light aluminum frame
- Chromoly fork adds front-end strength
- Easy assembly per owner feedback
- Wide handlebars and chunky tires
- Single speed only, no gearing
- Ships partially assembled
- Only one review on record
Performance notes
The aluminum frame keeps overall weight down compared to steel BMX bikes, which the one review on record noticed directly against a heavier steel bike. The straight-blade chromoly fork adds strength up front where BMX frames see the most stress, and the rear V-brake is the sole stopping method on this single-speed setup.
Specifications
| Brand | Gravity |
|---|---|
| Dimensions & fit | |
| Wheel Size | 19 inches |
| Maximum Weight Recommendation | 200 pounds |
| Size | 19 inches |
| Minimum User Height | 68.9 inches |
| Capacity & performance | |
| Number Of Speeds | 1 |
| Age Range Description | Adult |
| Power & efficiency | |
| Power Source | Pedal |
| Construction & materials | |
| Frame Material Type | Aluminum |
| Wheel Material | Aluminum |
| Color | Electron Blue |
| Included components | |
| Unit Count | 1 |
| Included Components | Tool Kit |
| Other details | |
| Bike Type | BMX Bike, Cruiser Bike |
| Suspension Type | Rear |
| Gear Type | Fixed Gear |
| Is Assembly Required | Yes |
| Skill Level | Intermediate |
| Additional Features | 21 speed, Aluminum Frame, BMX |
| Brake Style | Linear Pull |
| Intended Riding Terrain | BMX Terrain |
How it compares
This product against the closest alternatives we track in bmx bikes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Gravity Area 51 Adult BMX Bike Aluminum Frame Single Speed CruiserThis product | 5.0 / 5 | 2 | 2.7 / 5 |
| cubsala 20 24 26 Inch BMX Race Bike Trident Bicycles Beginner-Level to Advanced Riders…cubsala | 4.6 / 5 | 295 | 4.0 / 5 |
| Elite BMX Bicycle 18"Bicycles | 4.3 / 5 | 202 | 4.0 / 5 |
| Throne Cycles Goon 29erThrone | 4.4 / 5 | 77 | 4.0 / 5 |
| Mongoose Legion Freestyle BMX Bike for Advanced-Level or Professional RidersBrand | 4.2 / 5 | 795 | 3.9 / 5 |
Similar bmx bikes from other brands
Questions about the Gravity bmx bikes
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
How much assembly does the Gravity Area 51 need?
It arrives partially assembled, with final assembly and tuning needed before riding.
Is the frame steel or aluminum?
It uses a light aluminum frame with a straight-blade chromoly fork.
How many gears does it have?
It is a single-speed bike with no gear shifting.