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🚴♂️ Ride Ready, Rugged, Reliable – Never Miss a Mile!
The Mongoose 20-inch Replacement Bike Tire Tube is designed specifically for fat bikes with 4" to 4.9" wide tires. 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 heritage, this tube is the essential backup for any serious fat bike rider.



| ASIN | B01CGDVXL8 |
| Best Sellers Rank | #55,815 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #359 in Bike Tubes |
| Bike Type | Fat Bike |
| Brand | Mongoose |
| Brand Name | Mongoose |
| Compatible Tire Width Maximum | 4 Inches |
| Compatible Tire Width Minimum | 4 Inches |
| Customer Reviews | 4.6 out of 5 stars 6,080 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 (Accessories) |
| Manufacturer Part Number | MG78457-6 |
| Material | Rubber |
| Material Type | Rubber |
| Model Number | MG78457-6 |
| Size | 20" x 4"-4" |
| UPC | 038675068285 |
| Unit Count | 1.0 Count |
| Valve Length | 1.5 Inches |
| Valve Type | Schrader |
| Warranty Description | limited |
| Wheel Size | 20 Inches |
R**R
Mongoose
Mongoose brand tubes. Good thickness, most importantly, reliable quality control. If your buying 20x4 tubes buy these ones and an 8oz bottle of slime per tube. Use your old tubes as tune liners by cutting off the old valve stem and slicing the inside circumference of the old tube. Making a shell that your new tube can wear. Put one side of the tire on the rim then Insert the liner you made with the old tube into the tire, then put in the new tube, starting with the valve ste. Slightly inflating the tube once you have the valve stem in makes it easy to go around pushing the tube into the liner)tire. Once you have it all in there go to the stem part and now press that part of the tire into the rim go around with your left and your right and before they meet at the top of the rim you will get to a point where the tire needs to stretch a little to get on the rim the rest of the way. This is where you use your tire levers to pry from outside inward, being very careful that the top of your lever is against the metal of the rim not the rubber of the tube. Get one lever put in place and hold it there while you get the other leaver to do the same thing on the other side of the stretch, with both sides on levered like that the remaining part that needs to stretch will be shorter. Just press it inbwith your finger. If you can't then squeeze the tire where one of your levers is, so it doesn't come off when you remove it's lever, and use the lever to pry the remaining bead into the rim . Being careful not to pinch the tube. Once is on the rim completely pump it up.
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!
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.
D**Y
Thick Rubber
Quality Product. Perfect fit.
M**K
Very happy with this tire
Great thick tire and fits my bike perfectly
K**Y
THIS IS WHAT YOU NEED! WORKS PERFECT.
QUALITY TIRE TUBE, EASY TO INSTALL, HAS NOT LEAKED. VERY DURABLE.
A**S
Great product
It was as expected. Thank you.
T**S
Great quality and service
Long-lasting good quality
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.
B**N
Good
Arrived as expected. Glad to find a fat bike tyre that has the Schrader valve
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.
R**.
Llego antes de lo esperado
EN BUEN ESTADO Y DE BUENA CALIDAD YA EN USO
A**R
good item
nice item feels like a good inner tube will be purchasing more when needed
Trustpilot
2 weeks ago
1 day ago