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Mongoose Grafton Mountain Bike, 24, 26 or 27.5 Inch Bike, 21 Speed, Aluminum Frame, Knobby Mountain Tires, Suspension Fork, Trigger Shifters, Mechanical Disc Brakes, Teal, Tan, Blue or Purple

  • Based on 132 reviews
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$397.51 Why this price?
Holiday Deal · 8% off was $434.00

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Size: 27.5-Inch Wheels


Color: Blue


Features

  • HARDTAIL MOUNTAIN BIKE: Go exploring with the Grafton by Mongoose. Featuring 27.5-inch wheels, this bike is perfect for riders from 5'3" - 6'0" tall. Roll over difficult terrain with ease.
  • BORN IN DIRT: From pavement to singletrack, the aluminum hardtail frame is built for adventure. With modern geometry and an internal headset, this womens and mens mountain bike offers a clean, streamlined look.
  • BUILT FOR ADVENTURE: This Mongoose mountain bike is ready to roll with 2.3-inch-wide knobby mountain tires for superior grip and stability. The suspension fork absorbs bumps and rough terrain, ensuring a smooth, controlled ride.
  • SHIFT INTO GEAR: This 21-speed bike features trigger shifters for smooth transitions and the right gear for your ride. Mechanical disc brakes provide reliable all-weather stopping power, giving riders control on varied terrain.
  • KNOW YOUR ROOTS: As one of the OGs in BMX and action sports, Mongoose has helped bring this movement to the world. For over 50 years, we've been all about epic rides and pushing limits and we're just getting started.

Description

Adventure starts where the pavement ends with the Mongoose Grafton, an adults and kids mountain bike built for all-terrain fun. With 24, 26 or 27.5-inch wheels, this adults, boys and girls mountain bike is ideal for riders between 4'8"" - 6'0"", perfect for bringing all explorers into the action. Its aluminum rims and 2.3-inch-wide knobby mountain tires provide superior traction and stability. The aluminum mountain frame is easy to handle while offering a clean look with its modern geometry and internal headset. Equipped with trigger shifters, this 21-speed bike ensures smooth shifting and a wide gear range for tackling your ride. Mechanical disc brakes provide reliable stopping power in varied conditions, keeping riders in control. Whether taking on the trail or cruising the neighborhood, the Grafton is ready for the adventure. Assembly is easy with a few common household tools and the included instruction guide. At Mongoose, we know our roots – as pioneers in BMX and action sports for over 50 years, we're dedicated to delivering an epic ride every time. Get ready to push the limits.

Bike Type: Mountain Bike


Age Range (Description): Adult


Brand: Mongoose


Number of Speeds: 21


Color: Blue


Wheel Size: 27.5 Inches


Frame Material: Aluminum


Suspension Type: Front


Special Feature: Aluminum Frame, mountain bike


Included Components: Bike


Bike Type: ‎Mountain Bike


Age Range (Description): ‎Adult


Brand: ‎Mongoose


Number of Speeds: ‎21


Color: ‎Blue


Wheel Size: ‎27.5 Inches


Frame Material: ‎Aluminum


Suspension Type: ‎Front


Special Feature: ‎Aluminum Frame, mountain bike


Included Components: ‎Bike


Size: ‎27.5-Inch Wheels


Brake Style: ‎Disc


Specific Uses For Product: ‎Trail


Item Weight: ‎16.8 Kilograms


Style: ‎Blue


Model Name: ‎Grafton


Power Source: ‎manual winding


Wheel Material: ‎Rubber


Year: ‎2022


Seat Material Type: ‎Plastic


Warranty Type: ‎Limited


Assembly Required: ‎Yes


Bicycle Gear Shifter Type: ‎Trigger


Skill Level: ‎Intermediate


Minimum User Height: ‎63 Inches


UPC: ‎038675263710


Bicycle Drivetrain Type: ‎derailleur


Manufacturer: ‎Pacific Cycle, Inc.


Frame Size: ‎17 Inches


Item Package Dimensions L x W x H: ‎56 x 29 x 10 inches


Package Weight: ‎19.89 Kilograms


Brand Name: ‎Mongoose


Warranty Description: ‎Limited


Material: ‎Aluminum


Suggested Users: ‎unisex-adult


Part Number: ‎R8002


Date First Available: April 20, 2022


Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

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.

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Top Amazon Reviews


  • Nice and strong bicycle.
Size: 27.5-Inch Wheels Color: Blue
Easy to assemble, smooth ride. Why did you pick this product vs others?: Good brand and sturdy design, and nice blue color.
Reviewed in the United States on June 20, 2025 by Javier Rodriguez Salomon

  • No pedals
Size: 24-Inch Wheels Color: Purple
Took 2 weeks to get the bike. And there wasn’t any pedals in the box. Seems like bike was a return not brand new like it was supposed to be. Very disappointing.
Reviewed in the United States on August 26, 2025 by Clad

  • Best price around!!!
Size: 27.5-Inch Wheels Color: Blue
I found this same bike at a big name sporting goods chain store for almost double. All aluminum frame with shocks. I can’t say enough about the price this is selling for.
Reviewed in the United States on May 9, 2025 by Jerel Hotaling

  • Perfect bike
Size: 26-Inch Wheels Color: Teal
My Daughter LOVES this bike and its disc breaks!
Reviewed in the United States on June 4, 2025 by Lora Parrish

  • Very Good For The Price
Size: 26-Inch Wheels Color: Teal
This bike is very good for the price. After riding it daily it has been reliable and fun to ride on flat trails and marshland where I live in Hawaii. I have not taken it on any mountain areas yet so not sure how it would hold up there. The frame is solid, quite light in weight (I think aluminum) it shifts and handles well, and the disc brakes and tires are very good. The only complaints for me would be it has hard rough suspension, you will feel every bump, and a hard seat. Overall a very decent bike for the price and definitely recommended. Sweet color choices too. ... show more
Reviewed in the United States on August 26, 2025 by THEO

  • Gorgeous Mongoose Bike...
Size: 27.5-Inch Wheels Color: Blue
Nice paint!! Overall, this bike's craftsmanship follows with other Mongoose mountain bikes, but I will be swapping out these OEM 'streetable' tires for a set of more aggressive, knobby, and sticky offroad tires that are more suitable for my mountain, trail, brush, loose gravel-filled, and otherwise tricky and nonpaved roads, which I encompass during my frequent MTB jaunts. ... show more
Reviewed in the United States on September 5, 2024 by Carlos Ubirlea

  • Not great
Size: 26-Inch Wheels Color: Teal
Unfortunately we started assembling this bike and there were parts welded backwards so it was impossible to assemble. Had to send it back. The whole return/refund process took about a month. Not a great experience in anyway!
Reviewed in the United States on July 29, 2025 by ideadara

  • Not my style of bike.
Size: 26-Inch Wheels Color: Teal
The fit was not for me. I felt like I was slouched over and did not feel comfortable. The overall quality of the material was good.
Reviewed in the United States on November 6, 2025 by martha king

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