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Mongoose Grafton Mountain Bike, 21 Speed, Aluminum Frame, Knobby Mountain Tires, Suspension Fork, Trigger Shifters, Mechanical Disc Brakes | Trigger Shifter

  • Based on 135 reviews
Condition: New
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$349.99 Why this price?
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Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, Jun 11
Order within 9 hours and 27 minutes
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Size: 26-Inch Wheels


Color: Tan


Features

  • HARDTAIL MOUNTAIN BIKE: Go exploring with the Grafton by Mongoose. Featuring 26-inch wheels, this bike is perfect for riders from 5'2" - 6'1" 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: Tan


Wheel Size: 26 Inches


Frame Material: Aluminum


Suspension Type: Front


Special Feature: Aluminum Frame, Lightweight, mountain bike


Included Components: Mountain Bike


Bike Type: Mountain Bike


Number Of Speeds: 21


Suspension Type: Front


Additional Features: Aluminum Frame, Lightweight, mountain bike


Brake Style: Disc


Specific Uses For Product: Trail


Power Source: manual winding


Bicycle Gear Shifter Type: Trigger


Skill Level: Intermediate


Intended Riding Terrain: Mountain Terrain, Unpaved Trails


Derailleur Configuration: Rear


Bicycle Drivetrain Type: Derailleur


Is Autographed: No


Wheel Size: 26 Inches


Size: 26-Inch Wheels


Item Weight: 16.1 Kilograms


Warranty Type: No Warranty


Maximum Weight Recommendation: 32.2 Kilograms


Is Assembly Required: No


Minimum User Height: 64 Inches


Age Range Description: Adult


Brand Name: Mongoose


Included Components: Mountain Bike


Model Name: Grafton


UPC: 038675091306


Manufacturer: Pacific Cycle, Inc.


Warranty Description: One year limited warranty on parts, 30 days on wearable parts


Item Type Name: Mountain Bike


Color: Tan


Style Name: Tan


Frame Material Type: Aluminum


Wheel Material: Aluminum


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jun 11

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

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great mountain bike for beginners and everyday riding
Size: 26-Inch Wheels Color: Teal
This Mongoose Grafton mountain bike is a great bike for the price. It rides smoothly and feels sturdy on pavement, dirt trails, and light off-road riding. The suspension helps absorb bumps, making the ride comfortable even on rougher surfaces. Assembly was straightforward and everything fit together well. Once set up, the bike feels solid and well built. The brakes and gears work smoothly and make it easy to ride uphill or cruise comfortably. This is a great option for anyone looking for a reliable, good-looking mountain bike without spending a lot of money. I’m very happy with it and would definitely recommend it. ... show more
Reviewed in the United States on January 9, 2026 by Amazon Customer

  • Do not buy. Do not buy.
This is not the mongoose from pre-2010. Seat leather is crooked. The headset welds are stretched causing the bars to sit crooked. Bike looks beautiful but the build quality is atrocious.
Reviewed in the United States on May 1, 2026 Reviewed in the United States on May 1, 2026 by matt leithauser

  • Must Buy!
Size: 26-Inch Wheels Color: Teal
Great bike!
Reviewed in the United States on April 6, 2026 by Kristle

  • A great size with great features
Size: 26-Inch Wheels Color: Tan
This was my 12-yo grandson’s first large format bike. He helped assemble it (easy to do) and rode it out of the garage. Learning the Shimano 21 speed system took the time to climb his first hill. Great bike!
Reviewed in the United States on January 4, 2026 by Bob Pitchford

  • Bent front disk
Size: 26-Inch Wheels Color: Tan
So, when putting it together out of the box I noticed one thing; the front brake disk is bent and rubbing against the pad or the bolts.. I took it off altogether after I couldn't pound it back flat,and now going to have to buy a front disk. One other thing is the shifter design conflicts with a plastic mechanism next to it. Im being generous with 4 stars. Not sure if I should contact support for this or leave it alone. Buy at your own risk. ... show more
Reviewed in the United States on May 2, 2026 by Anthony L Williams

  • Very cheap
Size: 26-Inch Wheels Color: Tan
Design is very nice. The frame and size seemed small for my height (5’6”). Very poor quality components which break easily so be careful with the assembly and fine tuning. Once one starts to assemble the bicycle, trouble starts. There were issues with every item that needed assembly. The instructions don’t help either. Make sure one fine tunes all the gears and derailleurs before riding the bicycle. Maybe Amazon should spend some money on assembly and fine tuning the bicycles it sells and after this sending them out to the customers fully assembled. ... show more
Reviewed in the United States on October 5, 2023 by Frank

  • Not too bad
Size: 26-Inch Wheels Color: Tan
good bike, just needed to replace the defective stock crankset for an extry 65 bucks at my local bike shop. Other than that, its fine.
Reviewed in the United States on May 26, 2026 by Joel Diaz

  • Great bike
Size: 26-Inch Wheels Color: Tan
Beautiful bike. Good quality. Smooth ride.
Reviewed in the United States on February 16, 2026 by Jessica K

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