Mongoose Legion Mag Kids Freestyle or Mongoose Cipher Kids Mountain Bike? Which Mongoose Model to Buy
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You are deciding between the mongoose legion mag kids freestyle vs cipher kids mountain bike. Both models feature 20-inch wheels and target young riders. They differ in frame material and intended use. The Legion Mag uses a hi-ten steel frame for freestyle tricks. The Cipher uses an aluminum frame for general riding. This choice affects weight and durability. Read on to see how these specs impact your child's experience on the bike.
Key differences
| Aspect | Mongoose Legion Mag 20-Inch BMX Bike | Mongoose Cipher 20-Inch Kids Mountain Bike |
|---|---|---|
| Frame Material | Hi-Ten Steel | Tectonic T1 Aluminum |
| Number of Speeds | Single Speed (36x16T or 40x16T gearing) | 7-speed rear derailleur |
| Brake Type | Alloy rear U-brakes | Nexus Inter3 brake and coaster brake |
| Suspension Type | Rigid | Rigid aluminum fork |
| Weight | 32 pounds | Not listed |
Which one should you choose?
Choose Mongoose Legion Mag 20-Inch BMX Bike if
- You want a bike built for skatepark tricks and stunts.
- Your child prefers a simpler single-speed setup for learning control.
- You value durable steel construction for rough neighborhood riding.
Choose Mongoose Cipher 20-Inch Kids Mountain Bike if
- You need multiple gears for varied terrain and hills.
- You want a lighter aluminum frame for easier handling.
- Your child is transitioning to a multi-speed bike for everyday use.
Verdict: Choose the Legion Mag if your child focuses on freestyle tricks and wants a durable steel frame. Pick the Cipher if you need gears for varied terrain and prefer a lighter aluminum build. Both bikes suit young riders, but their designs serve different riding styles.
Legion Mag vs Cipher Key Differences
Frame Material
The Mongoose Legion Mag Kids Freestyle features a hi-ten steel frame. Steel is known for its durability and ability to withstand the impact of tricks and stunts. This makes it a robust choice for sidewalk BMX riding. In contrast, the Mongoose Cipher Kids Mountain Bike uses a Tectonic T1 aluminum frame. Aluminum is typically lighter than steel, which can make pedaling easier for younger riders. The Cipher also includes a rigid aluminum fork. This combination offers a different riding feel, prioritizing lighter weight over the heavy-duty resilience of the Legion Mag's steel construction. You should choose based on whether you prefer toughness or lighter weight.
Number of Speeds
The Mongoose Legion Mag is a single-speed BMX bike. It does not have multiple gears, which simplifies operation for beginners. This fixed gearing is ideal for performing tricks and maintaining momentum in skateparks or on smooth pavement. The Mongoose Cipher, however, is a multi-speed bike equipped with a 7-speed rear derailleur. It uses a twist shifter to allow young riders to change gears easily. This feature helps riders tackle different terrains and inclines more effectively. If you want versatility for varied riding conditions, the Cipher offers significant advantages over the single-speed design of the Legion Mag.
Brake Type
Stopping power differs significantly between these two models. The Legion Mag uses alloy rear U-brakes. This is a standard BMX brake setup that provides reliable stopping power for freestyle maneuvers. It is simple and effective for flat-ground tricks. The Cipher employs a dual-braking system with a Nexus Inter3 brake and a coaster brake. The coaster brake engages when you pedal backward, offering an intuitive stopping method for kids. The Nexus brake provides additional control. This combination gives the Cipher a more versatile braking experience, which can be safer and more comfortable for young riders transitioning to larger wheels compared to the single U-brake on the Legion Mag.
Tire Type
The tires on these bikes are designed for different surfaces. The Mongoose Legion Mag features aluminum mag wheels. While the specific tire width is not explicitly listed in the provided data, mag wheels are typical for BMX bikes and are optimized for smooth pavement and skatepark surfaces. They offer a solid, stable feel for tricks. The Mongoose Cipher is equipped with Kenda 20x1.75-inch tires mounted on Xposure XP-163 single-wall aluminum rims. The 1.75-inch width provides more traction and cushioning, making it better suited for light off-road trails, gravel, or uneven surfaces. If you plan to ride on mixed terrain, the Cipher's tires offer a clear advantage.
Target Audience
Both bikes target young riders, but their specific use cases differ. The Legion Mag is designed for kids and boys who want to emulate BMX pros. It is built for neighborhood or skatepark fun and tricks. The suggested height range for the 20-inch model covers riders up to 6'0" tall. The Cipher is designed for young riders looking to transition to a multi-speed bike with larger wheels. The suggested height for the Cipher is 4' to 5' tall. This makes the Cipher more suitable for younger children or those new to multi-speed riding. The Legion Mag is better for older or taller kids interested in freestyle riding. Choose based on your child's height and riding interests.
Choose the right Mongoose for your kid
Kid who loves tricks and skatepark stunts
The Legion Mag features a hi-ten steel frame built for durability during sidewalk BMX riding. Its alloy rear U-brakes provide secure stopping power for tricks. The aluminum mag wheels and sealed bearings offer smooth performance. This 32-pound bike is designed for beginners wanting to emulate pro riders with bold style.
Rider transitioning to multi-speed gears
The Cipher Kids Mountain Bike includes a 7-speed rear derailleur with a twist shifter. This allows young riders to adapt to different terrains easily. The lightweight Tectonic T1 aluminum frame and rigid fork offer a durable ride. It is ideal for kids between 4’ and 5’ tall who want to grow with their bike.
Parent seeking lighter weight for easier handling
The Cipher utilizes a Tectonic T1 aluminum frame, which is generally lighter than steel. This makes the bike easier for smaller riders to maneuver. The Nexus Inter3 and coaster brakes deliver reliable stopping power. Combined with Kenda tires, it provides a stable and comfortable experience for everyday riding on various surfaces.
Kid focused on style and durability
The Legion Mag stands out with upgraded aluminum mag wheels that turn heads. The hi-ten steel frame is tough enough to withstand neighborhood fun and skatepark impacts. With gearing options like 25x9T or 40x16T, it provides a reliable ride. This bike combines bold style with high performance for young enthusiasts.
The products compared
Mongoose Legion Mag 20-Inch BMX Bike
Best for: sidewalk freestyle and skatepark tricks
- Wheel Size
- 20-Inch
- Frame Material
- Hi-Ten Steel
- Brake Type
- Alloy rear U-brakes
- Target Audience
- Kids, Girls and Boys
- Weight
- 32 pounds
View on Amazon: Mongoose Legion Mag 20-Inch BMX Bike Affiliate link
This Mongoose Legion Mag is a 20-inch kids freestyle bike built for sidewalk and skatepark use. It features a hi-ten steel frame and upgraded aluminum mag wheels with sealed bearings. The bike includes alloy rear U-brakes for secure stopping power. Weighing 32 pounds, it suits riders between 3'6" and 6'0". This model offers durable construction and smooth rolling performance for young beginners learning BMX tricks.
Pros
- Upgraded aluminum mag wheels with sealed bearings
- Hi-ten steel frame for durability
- Alloy rear U-brakes for control
- Suitable for riders 3'6" to 6'0"
Cons
- Heavier 32-pound build compared to aluminum frames
- Only rear U-brakes, no front brake
- Hi-ten steel frame adds weight
Good fit if
- You want a durable bike for sidewalk tricks
- You prefer the look of mag wheels
- You are buying for a beginner rider
Skip if
- You need a lightweight aluminum frame
- You require dual disc brakes
- You want a bike for serious trail riding
Verdict: Mongoose Legion Mag 20-Inch Kids BMX is a solid choice for young riders focused on street and skatepark freestyle. Its steel frame and mag wheels provide the durability needed for learning tricks, though the weight may limit performance for older or heavier riders.
Mongoose Cipher 20-Inch Kids Mountain Bike
Best for: Kids transitioning to multi-speed bikes
- Wheel Size
- 20-Inch
- Suspension Type
- rigid
- Frame Material
- Tectonic T1 aluminum
- Brake Type
- Nexus Inter3 brake and coaster brake
- Number of Speeds
- 7-speed
- Tire Width
- 1.75-inch
View on Amazon: Mongoose Cipher 20-Inch Kids Mountain Bike Affiliate link
The Mongoose Cipher Kids mountain bike features a 20-inch wheel size and a 7-speed twist shifter. Its Tectonic T1 aluminum frame and rigid fork keep the weight low for young riders. The bike includes Kenda 20x1.75-inch tires and a Nexus Inter3 brake system. It suits kids aged 4 to 5 feet tall who want to transition to multi-speed riding.
Pros
- 7-speed rear derailleur with a twist shifter
- Lightweight Tectonic T1 aluminum frame
- Nexus Inter3 brake and coaster brake
- Kenda 20x1.75-inch tires on aluminum rims
Cons
- Rigid fork lacks suspension for rough trails
- Coaster brake requires pedaling backward to stop
- Single-wall aluminum rims are less durable than double-wall
Good fit if
- You want a lightweight aluminum frame for easier handling
- You need a 7-speed setup for varied terrain
- Your child is between 4 and 5 feet tall
Skip if
- You prefer full suspension for heavy impacts
- You want hydraulic disc brakes for stronger stopping power
- Your child is taller than 5 feet
Verdict: Mongoose Cipher Kids 20-Inch Mountain Bike is a solid entry-level choice for kids transitioning to multi-speed bikes. It fits riders 4 to 5 feet tall who need lightweight durability.
Specifications side by side
| Spec | Mongoose Legion Mag 20-Inch BMX Bike | Mongoose Cipher 20-Inch Kids Mountain Bike |
|---|---|---|
| Wheel Size | 20-Inch | 20-Inch |
| Suspension Type | not stated | rigid |
| Frame Material | Hi-Ten Steel | Tectonic T1 aluminum |
| Brake Type | Alloy rear U-brakes | Nexus Inter3 brake and coaster brake |
| Number of Speeds | not stated | 7-speed |
| Tire Width | not stated | 1.75-inch |
| Target Audience | Kids, Girls and Boys | Kids |
| Weight | 32 pounds | not stated |
| Size | 20-Inch Wheels/MAG | 20-Inch |
| Color | Orange | blue |
| Model | M41707M70OS | M55400U10OS-PC |
Frequently asked questions
Is the Mongoose Legion Mag good for skatepark tricks?
Yes, it is built for sidewalk freestyle and skatepark stunts. The hi-ten steel frame withstands impact from jumps and landings. Its 20-inch mag wheels offer durability for learning tricks. The steel construction provides the robustness needed for repeated use in a skatepark environment.
What is the weight of the Legion Mag bike?
The Mongoose Legion Mag 20-Inch BMX Bike weighs 32 pounds. This weight comes from its steel frame and mag wheel design. The heft may limit performance for older or heavier riders seeking agility, but it adds stability for beginners learning balance and control on flat ground.
Can the Mongoose Cipher handle off-road terrain?
The Cipher is designed as a mountain bike, making it suitable for light off-road use. It targets kids transitioning to multi-speed bikes. While it has a mountain bike geometry, its primary strength is providing a durable entry point for young riders exploring varied surfaces beyond smooth pavement.
What height range fits the Mongoose Cipher?
The Mongoose Cipher fits riders who are 4 to 5 feet tall. Its 20-inch wheel size matches this stature for proper reach and control. This sizing ensures the bike is manageable for younger children who need lightweight durability while they develop their riding skills on varied terrain.
Does the Legion Mag have a steel frame?
Yes, the Legion Mag features a hi-ten steel frame. This material choice prioritizes durability and impact resistance for freestyle riding. Steel frames are known for their strength, making them a robust choice for sidewalk BMX activities where the bike will encounter curbs, rails, and concrete surfaces frequently.
Which bike is better for a beginner transitioning to speeds?
The Mongoose Cipher is the better choice for this transition. It is designed for kids moving to multi-speed bikes. The mountain bike style offers versatility for different riding conditions. This model supports riders who want to explore varied terrains and develop gear-shifting skills rather than focusing solely on tricks.
Are the wheels on the Legion Mag alloy?
The Legion Mag uses alloy mag wheels. These wheels provide a solid, durable platform for freestyle tricks. The mag design eliminates spokes, reducing maintenance and increasing strength against impacts. This construction helps the bike withstand the rigors of skatepark riding and sidewalk stunts without the complexity of traditional spoked wheels.
What color options are available for these models?
The Legion Mag is available in orange. The Cipher comes in blue. These color choices allow you to select a bike that matches your child's personal style. The specific model codes indicate distinct colorways for each bike, helping you identify the exact variant when purchasing from retailers.

