Glerc 20" Mountain Bike For Beginner - Mars
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Free Shipping within the USGet your kids' bike delivered to your door at no extra cost!
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365-Day WarrantyEnjoy peace of mind with our full year of coverage on every bike.
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Expert Customer SupportChat online or call us for quick, reliable solutions to your questions.
Pair it with
Black Classic Brass Bell
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- Small Bell: Suitable for bicycle handlebars with an outer diameter of 2.2-2.5cm(0.87-1.0 inches), the bicycle bell can be easily installed on the right or left side.
- Exquisite bicycle bell: Our bicycle bell has a delicate appearance and is small in size: 3.5 * 2.2cm(1.37 * 0.86 inches). Including protective pads to prevent slipping.
- High Quality: Made of high quality brass, it has rust proof and anti-aging properties. Retro design, high-strength springs, and lightweight and sturdy alloy brackets make it durable.
- Loud Tone: This classic brass bicycle ringtone always brings us a crisp and loud tone. Pedestrians and passing vehicles can clearly hear your bell, making cycling safer.
- Small Bell: Suitable for bicycle handlebars with an outer diameter of 2.2-2.5cm(0.87-1.0 inches), the bicycle bell can be easily installed on the right or left side.
- Exquisite bicycle bell: Our bicycle bell has a delicate appearance and is small in size: 3.5 * 2.2cm(1.37 * 0.86 inches). Including protective pads to prevent slipping.
- High Quality: Made of high quality brass, it has rust proof and anti-aging properties. Retro design, high-strength springs, and lightweight and sturdy alloy brackets make it durable.
- Loud Tone: This classic brass bicycle ringtone always brings us a crisp and loud tone. Pedestrians and passing vehicles can clearly hear your bell, making cycling safer.
Glerc Kids MTB Helmet(S & M)
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- Lightweight Design: Weighing just around 240g, this kids helmet is designed to feel light and comfortable for everyday use.
- 360° Breathable Ventilation: Built with 360° airflow vents to help keep kids cool and comfortable during active rides.
- Reliable Head Protection: A properly fitted helmet helps reduce the risk of head injuries during biking, scootering, and outdoor play.
- Durable & Built for Adventure: Made with durable materials to support safe and confident riding across everyday outdoor activities.
- Versatile for Daily Activities: Ideal for biking, scootering, and general outdoor play, making it a great all-around safety essential for kids.
- Lightweight Design: Weighing just around 240g, this kids helmet is designed to feel light and comfortable for everyday use.
- 360° Breathable Ventilation: Built with 360° airflow vents to help keep kids cool and comfortable during active rides.
- Reliable Head Protection: A properly fitted helmet helps reduce the risk of head injuries during biking, scootering, and outdoor play.
- Durable & Built for Adventure: Made with durable materials to support safe and confident riding across everyday outdoor activities.
- Versatile for Daily Activities: Ideal for biking, scootering, and general outdoor play, making it a great all-around safety essential for kids.
What's In The Box
Our bikes come 85% pre-assembled for easy setup. Assembly tools and additional accessories are included.
Detailed ChartSizing Chart
Our easy size chart and geometry guide show how the bike will fit your child now—and how long it will continue to fit.
| Wheel Size | Rider Age | Rider Height | Inseam | Bike Weight |
|---|---|---|---|---|
| 20" | 6-13 | 47"-59" | 21"-26" | 31 lbs |
| 24" | 8-15 | 51"-65" | 23"-30" | 34 lbs |
Delivery
Processing Time
Orders ship within 24 hours on business days. Tracking details will be sent to your order email once shipped.
Shipping Time
- 3–5 Business Days (Typically) After Shipment
Delays may occur due to weather, holidays, carrier issues, or other unforeseen factors. View Full Shipping Policy.
Top Features
- Durable Hi-Ten Steel Frame
- Disc Brakes
- SHIMANO 6 Speeds Shifter
- Quick-Release Front Wheel
- Adjustable Seat
- Bell & Reflectors
- Kickstand
Description
- 【STURDY FRAME】This all-terrain mountain bike uses carbon steel frame and internal buried brake cables, which can greatly improve ride safety.
- 【Great Braking System】Disc brakes allow for more precise and controlled, are more effective than rim brakes, help to keep safer when riding at high speeds, down slopes and in wet conditions.
- 【Wider Tires】 20 x 2.8 inch knobby mountain fat tires provide excellent stopping power and tons of traction in sand and snow. This kids bike with soft seat offers more comfort in riding. Kickstand is included.
- 【Advanced Gear】 High-quality TY200D rear derailleur and handle shifters make gear changes smoother and easier. Fat tire bikes are more focused
on simplicity and comfort. - 【Assembly & Size Guide】85% pre-assembled, tools included. If you have any questions about bikes, please do not hesitate to contact us. The 20" bike fits 47"-59" tall kids for age 6-13, the 24" bike fits 51"-65" tall kids for age 8-15.
Specifications
- Bike Type: Mountain Bike
- Weight: Refer to size chart
- Frame: Carbon Steel
- Stem: Aluminum, Quill
- Brake Style: Internal Buried Brake Cables, Disc Brakes
- Bicycle Gear Shifter Type: Trigger
- Tire type: Wider Knobby Mountain Fat Tires
- Handlebar: Steel, Height adjustable
- Seat: Cubsala comfort, quick release
- Brake lever: Aluminum
- Wheelset: Aluminum
- Number Of Speeds: 6
The Mars Kids’ Mountain Bike by Glerc is built for young riders ready to climb, cruise, and explore. Perfect for:
- Ages 7–15
- Beginners looking to build control, balance, and confidence
- Kids who want to hit the trails, ride the park, or cruise the neighborhood
From first rides to off-road adventures, Mars grows with your child’s skills—and inspires them to go further every time.
The Mars is made to handle growing skills and big ambitions. Features that power every ride:
- Durable Hi-Ten Steel Frame – Tough and built to last
- Powerful Disc Brakes – Reliable stopping power in all conditions
- SHIMANO 6-Speed Shifter – Tackle hills and flat roads with ease
- Quick-Release Front Wheel – Simple to store, move, or adjust
With comfort, control, and durability at its core, Mars is ready to grow with your young rider—mile after mile.
Every Mars ride starts with Glerc’s promise of quality, safety, and joy:
- 1+ Year Warranty on Frame and other Normal Parts
- Free, secure, fast shipping with tracking
- 45-Day Easy Returns
From first unboxing to every adventure ahead, Glerc is here to support your young rider every mile of the way.
Not sure which mountain bike to choose?
FAQs
What size Mars mountain bike should I choose?
Choose the Mars bike size based on your child’s height and riding confidence. The 20 inch bike fits riders about 47"–59" tall, while the 24 inch bike fits riders about 51"–65" tall. If your child is between two sizes, consider their inseam, control, and experience before choosing.
What age is the 20 inch Mars mountain bike for?
The 20 inch Mars mountain bike is designed for kids around ages 6–13. It is a good choice for young riders who are ready for a bigger kids mountain bike with fat tires, gears, and disc brakes.
What age is the 24 inch Mars mountain bike for?
The 24 inch Mars mountain bike is designed for older kids and young teens around ages 8–15. It is suitable for riders who need a larger frame and more room to grow.
Is the Mars mountain bike good for beginners?
Yes. Mars is built as a beginner-friendly kids mountain bike. It is suitable for young riders who want to build confidence on neighborhood roads, park paths, dirt trails, and light off-road rides.
Does the Mars bike have fat tires?
Yes. The Mars mountain bike features wide knobby fat tires. These tires help provide better grip, stability, and control on different surfaces such as pavement, dirt paths, grass, sand, and light trails.
What is the Mars mountain bike best for?
The Mars mountain bike is best for kids and young teens who want a durable fat tire mountain bike for neighborhood rides, school routes, park paths, light trails, and outdoor adventures.
This is a really great bike for kiddos! It was easy to assemble and my son loves it. The larger tires seem to help him achieve a better balance which has translated into better control and a smoother ride. He calls it 'less shaky'. The bike is very sturdy and the 6 speeds has been easy for him to shift (this is his first bike with multiple speeds). The cables being hidden has helped with not catching on him when he gets on and off (he's 6 so this is a big bike too him). While the price seemed a little high, I believe it is well worth it as he can grow with this for several years.
The bike is impressively sturdy and well built, making it a solid choice for everyday riding. While the assembly process required some adjustments—such as rerouting the left-hand brake cable and repositioning the chain—I was ultimately able to get everything set up properly. These minor challenges were manageable with a bit of patience and a chain repair kit, and once assembled, the bike performed very well. If you're comfortable with basic bike maintenance or enjoy a bit of hands-on setup, this bike is a great option with excellent build quality.
This Glerc Mars mountain bike is really nice. It was relatively easy to put together, even for me, who never put a bike together before. There isn't a lot to assemble anyway. The outside of the box does recommend to have the bike assembled by a bicycle mechanic, but I think anyone with excellent hand mobility might be able to properly assemble this. But, going to a bike mechanic is still the safest option. BTW, make sure you watch the video on how to put it together because the instructions manual that comes with bike shows TWO different models but neither one is actually this bike. At first, it was frustrating and made me think I was missing some parts but then I watched the video and it all made sense.
I was pleasantly surprised to find that the tires were already inflated. They did need just a tiny bit more air put in them though. The tires also feel really durable. They're nice, thicker mountain tires, not the thinner ones that almost look like they belong on a ten-speed. They also have good tread. They were really stinky of that new, rubbery, chemical smell though, as new tires tend to smell, so I had to haul this little beast outside to finish assembling because the stink was filling up the room.
The bike seems to work great and the ride is smooth. I haven't had any issues with anything (yet). I'll let you all know if that changes anytime soon. Overall, I think this is a really nice, stylish bike for any kid or very petite person.
This is a well made bicycle. The essential components for hubs brakes and shifter are all high quality. The frame design is also well thought for young riders, enabling easy handling and low center of gravity. My 8 years old is happy. Assembly was easy as can be and there are no missing parts. The fat tires provide good suspension and traction on dirt roads. No need for heavy suspension components. The model decal typography would be my only criticism. I covered it with some tape so that I can sleep better. Lol.
One person found this helpful
Very nice quality and a big shout out to customer support. They were so helpful and you couldn’t get a nicer person on the phone sent me all kinds of how to videos and stayed on the phone till I was able to download them and find them on my iPad….
my son loves it perfect size and starter mtn bike
I have ordered two of these Mars beginner mountain bikes for my 7 yr old nephews. They are so easy to assemble and look great. So far so great. The boys are enjoying them and I am pleased with the quality.
Very well made bike. Had one problem with assembly and customer support was prompt in assisting and solving the problem. Grandson loves the bike.
This is my grandson’s first bike with a shifter and hand brakes and he absolutely loves it. Will be buying one for my granddaughter in a couple months when she saw her little brother riding this one she wants a pink bike for her birthday.
I purchased this bike for my "taller" 10-year-old son. He was very nervous to "graduate" from his 20" bike that he still has (it's more of a "trick" bike). He loves going on rides with the family now, can still do some of his "tricks," and this one will last him for a while as he continues to grow. Not hard to assemble and a great value for the money.
Bought the mars 20” for my granddaughter. She is loving it! ! Great bike with room to grow into!
My grandson’s gonna be so happy
Bike was on time, was easy to assembled. I like the brakes, the way it shifts gears also the kick stand, overall the bike was well design, good job guys.
Everything is great. Just wish that the fast shipping I paid for also sent the helmet. Helmet came a week later than the bike. Anywho… love the bike my son is having tons of fun riding already.
Amazing what they can ship to your door. In-store Walmart doesn’t seem to have anything but BMX bikes this size these days so we picked out this. Came mostly assembled In a relatively thin package. Brakes and lines all connected already. Just needed to assemble the pedals, wheels, and handle bars. Took all of 10 minutes.Bike is holding up well after a few months of regular use. Gears shift nicely. No brake squeal. Looks pretty nice. Structurally sound. Would buy again.
Why did you pick this product vs others?:This bike looks so sharpBike quality:Nice
Great bike for the transition into using gears. It seems to be really good quality especially when you have a kid who likes to ride hard and the bike looks just as pictured. Highly recommend and would purchase again when our next kid makes the transition to a bigger bike. It is pricey, but it seems like this bike will last a long time.
I bought two bikes for my twin 7 year old boys. They are solid, well spec'd and excellent looking. The boys took right to them, and transitioned seamlessly from their coaster brake single speed bmx into these big guy bikes. Even the concept of shifting came very quickly.
The only downsides where one of the bikes came with its stem cranked down so tightly it was crushing the headset. Neither headset looked to be set up or greased properly. And one of the bikes came with 1/2" pedals instead of 9/16. Being a mechanic, they were easy problems to solve, but slightly annoying and very avoidable.
Above and beyond expectations. My son loves it. Great bike.
Great bike for my 8 year old
Great Bike grandson loves it.
I got the 18 inch for my daughter. She’s right at 4ft tall and it’s perfect for her. Plus she loves the yellow color! It’s perfect!
5 year old loves it. Glad it comes with a kick stand
Very nice quality and a big shout out to customer support. They were so helpful and you couldn’t get a nicer person on the phone sent me all kinds of how to videos and stayed on the phone till I was able to download them and find them on my iPad….
awesome
We’ve taken it to the park, on sidewalks, even light trails — it handles everything beautifully.
Nice bike has worked great for my child!
This is absolutely a fantastic bike for the money. I especially appreciate the well constructed heavy duty frame and wider tires as it offers greater stability to our grandkids when riding it; it's a great safety feature. The kids tell me that the seat is comfortable and there are six gears with smooth shifting. Easy stopping as the brakes work very well. Overall, a great little bike. It's also fairly easy to assemble. Great gift for kids that like to be outdoors riding the trails. Oh, and the design of the frame is appropriate both boys and girls so all the grandkids can share.
