Mongoose Grafton Mountain Bike
- 26 inch wheels, aluminum frame and rims
- 21 speeds with trigger shifters and a rear derailleur
- Front suspension fork
- Mechanical disc brakes
- 16.1 kg with 2.3 inch knobby tires
Last refreshed Jun 21, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
An entry-level trail mountain bike with mechanical disc brakes, trigger shifters and suspension up front. Fit, assembly and warranty details conflict between fields.
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ASIN: B0BRBT2Y4XCategory: Mountain Bikes
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Overview
A rear derailleur and trigger shifters supply the gear range on the Mongoose Grafton, while a shock-absorbing fork and knobby tires take it onto unpaved trails. The frame and rims are aluminum, and the brakes are mechanical discs.
Standard trail components at a recognizable brand cover the basics for new riders. The limitation is the conflicting data: assembly is said to be needed in the description but not in the specs, and the warranty reads as none in one field.
Who it's for
A beginner or intermediate rider on unpaved trails and neighborhood paths. A rider outside the stated height range, or who wants a rear suspension, should look elsewhere.
Pros and cons
- Aluminum frame and rims
- Front suspension fork
- Mechanical disc brakes
- Wide knobby tires
- Rider height range unclear
- Assembly and warranty fields conflict
- Mechanical, not hydraulic, brakes
Performance notes
Knobby tires give grip on loose ground, and the front fork absorbs trail chatter. The drivetrain picks among the gears for climbs and flats. Mechanical disc brakes pull by cable, so they need adjusting over time.
Where it stands among mountain bikes
- #8 most-searched brand and model of the 15 mountain bikes lines we track (by search demand, not sales).
From the specs of the 99 mountain bikes we list; not a test result.
Specifications
| Brand | Mongoose |
|---|---|
| Dimensions & fit | |
| Wheel Size | 26 inches |
| Minimum User Height | 64 inches (spec); 4'8" to 6'0" (description)higher than 62% of 38 mountain bikes |
| Maximum Weight Recommendation | 32.2 kilograms |
| Item weight | 16.1 kilograms |
| Capacity & performance | |
| Number Of Speeds | 21 |
| Bicycle Gear Shifter Type | Trigger |
| Construction & materials | |
| Frame Material Type | Aluminum |
| Warranty & support | |
| Warranty Description | One year limited on parts, 30 days on wearable parts (description); no warranty (type field) |
| Other details | |
| Suspension Type | Front |
| Brake Style | Mechanical disc |
| Intended Riding Terrain | Mountain terrain, unpaved trails |
| Is Assembly Required | No (spec); easy with household tools (description) |
Closest rivals on specs
Frequently asked questions
What rider height fits the Mongoose Grafton?
The spec table says a minimum of 64 inches, while the description says riders 4'8" to 6'0". Confirm with the seller.
Do I need to assemble the Mongoose Grafton?
The spec field says no, but the description says assembly needs a few common tools and the included guide.
Does the Mongoose Grafton come with a warranty?
One field says no warranty. The description lists a one year limited warranty on parts and 30 days on wearable parts.
What wheel sizes does it come in?
The description mentions 24, 26 or 27.5 inch options, and this listing shows 26 inches.