---
product_id: 717783038
title: "Max4out Fat Tire Mountain Bike 21-Speed, with High Carbon Steel Frame, Double Disc Brake and Front Suspension Anti-Slip Bikes with 26 inch Wheels, Black"
brand: "max4out"
price: "¥102399"
currency: JPY
in_stock: false
url: https://www.desertcart.jp/products/717783038-max4out-fat-tire-mountain-bike-21-speed-with-high-carbon
store_origin: JP
region: Japan
---

# 4-inch ultra-grip fat tires 21-speed precision shifting high-carbon steel durable frame Max4out Fat Tire Mountain Bike 21-Speed, with High Carbon Steel Frame, Double Disc Brake and Front Suspension Anti-Slip Bikes with 26 inch Wheels, Black

**Brand:** max4out
**Price:** ¥102399
**Availability:** ❌ Out of Stock

## Summary

> 🚵‍♂️ Dominate the trail and turn heads with every ride!

## Quick Answers

- **What is this?** Max4out Fat Tire Mountain Bike 21-Speed, with High Carbon Steel Frame, Double Disc Brake and Front Suspension Anti-Slip Bikes with 26 inch Wheels, Black by max4out
- **How much does it cost?** ¥102399 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/717783038-max4out-fat-tire-mountain-bike-21-speed-with-high-carbon)

## Best For

- max4out enthusiasts

## Why This Product

- Trusted max4out brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** High-carbon steel frame resists deformation and ensures long-term durability under heavy use.
- • **Ride in Comfort:** Front suspension with thickened shock absorbers smooths out bumps for a plush ride experience.
- • **DIY Ready with Ease:** Comes with a full tool kit and clear installation video—get your bike ready in under 40 minutes.
- • **Conquer Every Terrain:** 4-inch fat tires deliver unmatched grip and anti-slip confidence on trails and city streets alike.
- • **Effortless Speed Control:** 21-speed gear system lets you power through uphill climbs and accelerate with precision.

## Overview

The Max4out Fat Tire Mountain Bike features a robust high-carbon steel frame, 21-speed precision shifting, and 4-inch wide fat tires designed for superior grip and durability. Equipped with front suspension and double disc brakes, it offers enhanced comfort and control on diverse terrains. Ideal for riders between 5'2" and 6', this bike supports up to 400 lbs and arrives 90% pre-assembled with tools and video instructions for quick setup.

## Description

Fat Tire Mountain BikeNumber of Speeds: 21Color: White/BlackWheel Size: 26 InchesFrame Material: Carbon SteelSuspension Type: FrontNormal Tire Mountain BikeFrame: AluminumBrake system: Disc BrakeShifter: Power 21-speed grip shifterRider Height: 5.2'-6'Maximum Rider Weight: 400lbsBicycle handle length: 24''Wheel diameter: 26.3''【INSTRUCTION】1. This bicycle arrives with 90% assembled. You need to install the front wheel, pedals, handlebar, and seat, and air up the tires.2. Bike Installation instructions are included in the package, please read them more carefully before installing the bike and tuning the brake and speed system.

## Features

- ☺21-SPEED - Compared with 7-Speed, 21-Speed can improve speed better. Outroad mountain bike can improve the Speed faster, change the Speed accurately and save more effort for uphill riding.
- ☺SHOCK ABSORPTION DESIGN - All-terrain MTB uses shock-absorbing front fork, and the thickened outer wall is more shock-resistant. Thickened shock absorber helps to absorb shocks, which can greatly improve ride comfort.
- ☺STURDY FRAME - This all-terrain mountain bike uses a high-carbon steel frame that combines quality and performance to resist deformation and stretching. The ergonomic design greatly improves the comfort during riding.
- ☺4 INCH FAT TIRE - Width up to 4 inches, 5 times more wear resistance than ordinary bicycle tires. Strong grip and anti-skid, fully able to challenge any terrain, conquer any off-road trails and urban roads.
- ☺INSTALLATION VIDEO - The installation package includes all the tools you need to build and maintain your own bicycle. You can install it according to the installation video we provide. All this takes about 20-40 minutes.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Z37H8ML |
| Additional Features | 21 speed, Fat Tire, mountain bike |
| Age Range Description | Adult |
| Bike Type | Hybrid Bike, Mountain Bike, Road Bike |
| Brake Style | Disc |
| Brand Name | Max4out |
| Color | Fat tire-black |
| Frame Material Type | Carbon steel |
| Included Components | Tool Kit |
| Is Assembly Required | Yes |
| Item Weight | 28.49 kg |
| Manufacturer | Max4out |
| Maximum Weight Recommendation | 149.69 kg |
| Model Number | mtb-013 |
| Number Of Speeds | 21 |
| Number of Handles | 2 |
| Specific Uses For Product | Trail |
| Suspension Type | Front |
| UPC | 823895719648 |
| Wheel Size | 26 Inches |

## Product Details

- **Age range (description):** Adult
- **Bike type:** Hybrid Bike, Mountain Bike, Road Bike
- **Brand:** Max4out
- **Colour:** Fat tire-black
- **Number of speeds:** 21

## Images

![Max4out Fat Tire Mountain Bike 21-Speed, with High Carbon Steel Frame, Double Disc Brake and Front Suspension Anti-Slip Bikes with 26 inch Wheels, Black - Image 1](https://m.media-amazon.com/images/I/71MMoKA1+qL.jpg)

## Questions & Answers

**Q: What tools do i need to assemble?**
A: Dear buyer: You can watch this video if you have any assembly problems.

**Q: What is the exact weight of the fat bike version? I keep seeing different weights**
A: I bought this same exact bike from a "different seller" under a different manufacturer, who oddly no longer exists on Amazon *cough shell companies *cough*

I'm 6'1" weigh 500+lbs, and rode it to work and back for a while.  Had to get a different seat, and the pedal lengths were kinda awkward for my leg length, but overall, i was happy with it.

**Q: What is the max recommended height for this?**
A: The maximum recommended height of the seat from the wheel is about 10-12 inches, you could also refer to the advertising size picture.

**Q: Does the package include the tools you need to assemble the bike?**
A: I got the other bike, but the tools wee there to put it together,.......

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.jp/products/717783038-max4out-fat-tire-mountain-bike-21-speed-with-high-carbon](https://www.desertcart.jp/products/717783038-max4out-fat-tire-mountain-bike-21-speed-with-high-carbon)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-23*