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Mongoose

Mongoose Flatrock 21-Speed Hardtail Mountain Bike, 24 to 29-Inch Wheels, for Men Women Boys and Girls, Front Suspension, 14.5 to 18-Inch Aluminum Frame Options

    • Based on 351 reviews
Condition: New
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$539.99 Why this price?

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This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: Only 2 left in stock, order soon!
Fulfilled by Globally Ventures
Arrives Apr 14 – Apr 21
Order within 2 hours and 34 minutes
Available payment plans shown during checkout

Recently Viewed

Color: Blue


Size: 14.5-Inch Frame/24-Inch Wheels


Features

  • Hardtail MTB with a lightweight 6061 aluminum frame and 24-inch wheels is perfect for all terrain adventures, best fit to riders 4'8" to 5'6" tall
  • Element suspension fork improves performance and control while providing a smoother ride
  • 21-speed twist shifters and rear derailleur provide effortless gear changes when riding up an incline or speeding down a decline
  • Reliably stop with confidence using the front and rear alloy v-brakes, delivering dependable stopping power
  • Experience lightweight durability with the double wall alloy rims

Description

Explore rad new trails with the Flatrock mountain bike by Mongoose. The Flatrock comes equipped with a lightweight aluminum hardtail frame and Element suspension fork that are ready to tear down the trail. 21-speed twist shifters and rear derailleur provide effortless gear changes, while alloy v-brakes deliver reliable stopping power. Plus, double wall alloy rims offer lightweight durability. Get out there and explore with the Mongoose Flatrock.

Bike Type: Mountain Bike


Age Range (Description): Adult


Brand: Mongoose


Number of Speeds: 21


Color: Blue


Wheel Size: 24 Inches


Frame Material: Aluminum


Suspension Type: Front


Special Feature: Lightweight


Included Components: Flatrock Bike


Bike Type: ‎Mountain Bike


Age Range (Description): ‎Adult


Brand: ‎Mongoose


Number of Speeds: ‎21


Color: ‎Blue


Wheel Size: ‎24 Inches


Frame Material: ‎Aluminum


Suspension Type: ‎Front


Special Feature: ‎Lightweight


Included Components: ‎Flatrock Bike


Size: ‎14.5-Inch Frame/24-Inch Wheels


Brake Style: ‎Linear Pull


Item Weight: ‎15.2 Kilograms


Style: ‎Bike


Model Name: ‎Flatrock


Power Source: ‎Pedal power


Wheel Material: ‎Aluminum


Year: ‎2021


Seat Material Type: ‎Vinyl


Warranty Type: ‎Limited


Maximum Weight Recommendation: ‎120 Kilograms


Assembly Required: ‎Yes


Bicycle Gear Shifter Type: ‎Twist Grip


Is Autographed: ‎No


Number of Handles: ‎2


UPC: ‎038675236141


Manufacturer: ‎Pacific Cycle, Inc


Item Package Dimensions L x W x H: ‎47.7 x 26.3 x 9.2 inches


Package Weight: ‎18.01 Kilograms


Brand Name: ‎Mongoose


Warranty Description: ‎Limited Lifetime


Material: ‎Aluminum


Suggested Users: ‎unisex-adult


Part Number: ‎R1996


Date First Available: December 11, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Apr 14 – Apr 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Nice bike
Color: Red Size: 18-Inch Frame/29-Inch Wheels
Easy to assemble, good suspension, we like this bike. It rides nicely, seems very well-made.
Reviewed in the United States on February 6, 2024 by Anais
    • "You Get What You Pay For" Should be the Title for Every Bike Purchased in this Price Range
Color: Blue Size: 14.5-Inch Frame/24-Inch Wheels
It's a really heavy Mongoose but .. I knew that when I pressed the "add to cart" button. The hardware on the bike is mediocre but .. knew that. The bike does everything you need it to do .. unless you're a "bike person". If you ride this too hard .. it breaks. If you use it for transportation, or if you need a good beater for your kid who will be throwing this at the ground repeatedly until they move out of your house chasing some dream job in cosmetology or whatever nightmare they're dreaming of .. this is the bike for you. Assembly was complicated by the fact that it's just an okay bike. The tools they include are enough to assemble the bike with but, you can cut your assembly time in half if you just have some basic tools lying around the house. The bike rides and feels fine. With some fine tuning on the brakes and shifter mechanism, the bike would stop and shift fine. Solid "bang for the buck" on this but, if you spend another couple hundred bucks, there are better choices that would be worth much more than the extra investment. All in all .. this is okay and it's fine unless you're really trying to do anything outside the realm of "commuting". ... show more
Reviewed in the United States on July 27, 2023 by Sean C.
    • Easy to Assemble and Meets My Needs
Color: Purple Size: 16-Inch Frame/26-Inch Wheels
I live in a medium-sized neighborhood; I bought this bike to more easily travel within my neighborhood without having to use my car for very short trips. I have never assembled a bike before, but I was able to assemble this one quite easily. The instructions were a bit confusing, because instructions are included for several different versions of the bike, but once I acclimated to which instructions were applicable to me, it wasn't very hard. I did have to purchase a few items for assembly, but they were not very costly, and they will be useful additions to my toolbox. Assembly really only entailed attaching the handlebars, seat and pedals. All of the gear mechanism was already assembled. The bike is easy to ride and operate. So far, I'm completely satisfied with this purchase! ... show more
Reviewed in the United States on October 20, 2022 by Wendi McDaniel
    • major component failure in less than 35 miles of riding this bicycle
Color: Red Size: 18-Inch Frame/29-Inch Wheels
hi,,when i first received this bicycle it looked well made,,the frame looked good,the wheels looked good...etc..mongoose bicycles have been around for a while...didn't think there should be any problems...i rode the bicycle for approx,,,one week,,each time i rode the bicycle 6 to 8 miles [on a paved road] i had rode a total of 35 miles i was finishing a ride about a half of a mile before i reached home...i was going about 5mph then suddenly i hear this loud noise i jump off the bicycle to see whats going on,,i see that the rear derailleur sheered in half ,,moving forward on the drive chain into the rear wheel,,the other half of the rear derailleur was hanging there broken in half..i couldn't believe this happened....,only 35 miles in total luckily i was close to home about a 15 minute walk...i've been riding bicycles for over 60 years and have never seen a derailleur failure like this..this is a shimano labeled derailleur ..this derailleur should be recalled immediately luckily i didn't fall off the bicycle with a injury...the center piece [a casted item] of that shimano derailleur completely failed obviously poor quality control/low ball manufacturing/metallurgy,,,i lost complete confidence in this bicycle,,,what a disappointment,,i called amazon customer service,they helped,,its been returned i am still waiting for my refund..thats my story,, ... show more
Reviewed in the United States on February 26, 2024 by travelman
    • Mongoose bike
Color: Blue Size: 14.5-Inch Frame/24-Inch Wheels
My grandson was delighted !!
Reviewed in the United States on December 14, 2024 by Kindle Customer
    • If you don’t have certain tools you will not be able to ride!!
Color: Silver Size: 17-Inch Frame/26-Inch Wheels
Ugh was excited for this to come in and now I’m debating on returning. I haven’t even been able to assemble it because it didn’t come with tools to assemble it. I have to find someone who will prolly have the tools. For almost four hundred bucks you guys can add the tools with the purchase! Bike is cute but definitely could be 100% better. I’m honestly unsatisfied and probably gonna end up returning it honestly. ... show more
Reviewed in the United States on October 9, 2024 by Syn
    • Mongoose Bikes At Their Best!!
Color: Red Size: 18-Inch Frame/29-Inch Wheels
Legendary reliability and development on full display with this large, capable, and comfortable Mongoose mountain bike!
Reviewed in the United States on September 5, 2024 by Carlos Ubirlea
    • Beautiful bike.
Color: Silver Size: 17-Inch Frame/26-Inch Wheels
Beautiful bike. Had to get the tool separate to set it up. The set up was a bit more difficult than I anticipated, but defiantly worth it for the finished product. It had a quality frame and beautiful tires, as well as the beautiful blue color through out. Would recommend for an overall quality bike for anyone looking to purchase. Thanks to the seller. ... show more
Reviewed in the United States on January 17, 2025 by Amazon Customer

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