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🚴♂️ Keep your fat bike fearless with Mongoose – because every ride deserves unstoppable momentum!
The Mongoose Replacement Bike Tire Tube is engineered for fat bikes with tire widths from 4" to 4.9", available in multiple wheel sizes including 20" and 27.5". Made from thick, durable rubber and equipped with a standard Schrader valve, it offers quick inflation and long-lasting performance on rugged terrain. Easy to install and backed by Mongoose’s 50+ years of BMX and action sports expertise, this tube is the essential backup for any serious fat bike rider.



| ASIN | B01CGDVXL8 |
| Best Sellers Rank | #63,885 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #416 in Bike Tubes |
| Bike Type | Fat Bike |
| Brand | Mongoose |
| Brand Name | Mongoose |
| Compatible Tire Width Maximum | 4.9 inches |
| Compatible Tire Width Minimum | 4 inches |
| Customer Reviews | 4.6 out of 5 stars 2,747 Reviews |
| Global Trade Identification Number | 00038675068285 |
| Included Components | bicycle tube |
| Item Diameter | 20 inches |
| Item Type Name | Bike Tube |
| Item Weight | 4 ounces |
| Item Width | 4 inches |
| Manufacturer | Pacific Cycle Inc. |
| Manufacturer Part Number | MG78457-6 |
| Material | Rubber |
| Material Type | Rubber |
| Model Number | MG78457-6 |
| Number of Items | 1 |
| Size | 20" x 4"-4.9" |
| UPC | 038675068285 |
| Unit Count | 1 Count |
| Valve Length | 1.5 inches |
| Valve Type | Schrader |
| Warranty Description | limited |
| Wheel Size | 20 inches |
J**I
Good price good product
It’s mongoose so you can’t go wrong, but their customer support is a holes, but it’s moose. They deserve to be a holes.
C**C
Exactly what I hoped
I have a fat tad cxs that came with chaoyang tires and tubes and I wanted to replace with chaoyang but I settled for these mongoose tubes because I couldn’t find chaoyangs. These are chaoyangs. The directions on the box made installation extremely easy. I’ll be using mongoose tubes and tires from now on. They fit my needs and my budget.
K**Y
THIS IS WHAT YOU NEED! WORKS PERFECT.
QUALITY TIRE TUBE, EASY TO INSTALL, HAS NOT LEAKED. VERY DURABLE.
R**R
Thick inner tube
The 20" Fat Tire Tube went in easy and once aired a little, I was able to get any kinks out of it for a smooth fit and ride. It was thicker than the inner tube that was in the bike from the factory.
G**G
Good Purchase
No Issues with these tires. It also makes it easier purchasing this product on Amazon because these are hard to find in department stores.
B**T
order now and forget the wait.
Why do fat tire bikes with factory tubes develop slow leaks? First of all, 99% of all slow leaks are found where the tube faces the outside (roadside) of the tire. NOT where the tube rubs against the tire/wheel on the inside. Why? Once manufactured and installed, the tube starts to "stick" to the tire in places as it sits in storage waiting to be delivered. Unless you deflate and re-inflate both tubes before riding the bike those "sticky" spots will form pin hole leaks. Believe me, I've been at this for a while. It's as simple as that. Next time you need to replace a tube - stick it in water and see for yourself where the bubbles are coming from . . . . Never ever inflate one of these tubes with compressed air! Always use a hand or foot pump with a gauge. I've had great luck with Mongoose - ride safe!!
R**E
Perfect Tube for Lectric eBike
This tube works perfectly for the Lextrix eBike XP or XP Step-thru. Install is easy once you've done it a couple of times (unfortunately) - there are some great videos on You Tube that walk you through it. These tubes pop right in and are durable - they hold up very well! Price is fair - honestly - if you can, do it yourself! We paid a shop for our first flat tire and it cost $50 and took over a week. We now stock a couple of these and can change the rear tire tube in about 30 minutes! Give it a go!
A**X
Great
This inner tube feels thicker than the one I replaced so I am hoping it is a little stronger. I guess time will tell.
M**I
Punctured easily on offroad
I replaced my 2000W ebike front tire with this one. it was all perfect until a tiny sharp object punctured it while using the bike. I thought of using car tire repair kit but its hopeless.
C**R
Nice quality
Excellent product and very good value
A**E
Top Fahrradschlauch für Fat-Bikes!
Bin froh, dass ich mich für diesen Schlauch entschieden habe. Dieser Schlauch ist sehr robust und von sehr guter Qualität. Zudem ist der Schlauch auch sehr gut verpackt. 100% Kaufempfehlung.
I**L
Muy burna
Muy buena
T**V
Good quality
Great replacement
Trustpilot
1 month ago
3 weeks ago