The frame bag, also called a stem bag, is one of the most accessible storage options that can be used on any type of bike. These bags are mounted behind the stem and are one of the easiest ways to carry items with you on your bike. They’re also a great way to carry items like a phone, snacks, and tools without having to wear a backpack.
Here are our favorite mountain bike frame bags.
Our Editor’s Best Mountain Bike Frame Bag Reviews
Trail Mountain Bike Frame Bag (Medium)

Key Features:
-
This mountain bike frame bag is designed to fit most trail/mountain bike frames, and comes in 3 different sizes. To determine which size is best for your bike, you will need to measure the inside length of your bike frame’s top tube, seat tube, and down tube, and compare those measurements to the sizing chart provided by the manufacturer.
ROCKBROS Bike Frame Bag Bike Triangle Bag Waterproof Bike Top Tube Bag Cycling Pouch 1.5 L Classified Capacity

Key Features:
-
This mountain bike frame bag is large enough to carry a long pump, with a classified capacity of 1.5L. It has a side pocket for small items like your ID card, cash, and keys, and the other side can hold your cellphone, bike light, and repair tools.
-
This mountain bike frame bag has a waterproof design that will keep your belongings dry in the heaviest of rainstorms. The bag is made of waterproof material and has airtight zippers to keep water out. Enjoy your cycling trip without having to worry about the weather.
-
This mountain bike frame bag has two zippers on opposite sides, making it easy to access your belongings while on the go. The zippers are durable and airtight, preventing your belongings from falling out or getting damaged.
-
This frame bag is made of 600D polyester, which is wear-resistant and easy to clean. The material is high density, so it will keep the water out and protect the bag from soaking. The bag weighs about 160g, so it won’t add any burden to your ride.
-
This mountain bike frame bag is easy to install and comes with 5 long adhesive straps. It can be installed on the bike top tube, under the bike top tube, or on the down tube. The bag has a built-in PP keel to keep it in shape, even when it is full. The narrow shark shape will not rub against your legs while riding. It is compatible with mountain bikes, road bikes, and city bikes with a top tube length of at least 17.72″.
Bike Bag Bike Frame Bag Bicycle Bag Waterproof Cycling Bag for Bike Frame Pouch Cycling Phone Wallet Mountain Bike Frame Bag Road Bikes Accessories Bike Pouch Easy Installation Bike Bags for Bicycles

Key Features:
-
This is a mountain bike frame bag that is only suitable for adult sized road bikes. It is not meant for kids or women’s bikes.
-
This mountain bike frame bag is designed to fit in the frame of your bike, with space for a water bottle. Please check the size details in the picture to ensure that this bag will fit your bike before purchasing.
-
This mountain bike frame bag is designed for easy installation and secure storage of your bike with adjustable Velcro straps.
-
This mountain bike frame bag is made from a durable and lightweight material that is suitable for all weather conditions. It has a robust design that will protect your belongings while you are riding.
-
The bag is designed to be versatile and can be used to store a phone, tools, or other small items.
-
This mountain bike frame bag is a waterproof storage bag that keeps your gear dry. It is made of high-quality materials and is designed to fit your frame.
WOTOW Bike Frame Storage Bag, Water Resistant Reflective Bicycle Triangle Bag with Two Side Pockets, Strap-On Under Seat Tool Accessories Pouch for Mountain Road Bike Trip (1.5L)

Key Features:
-
The mountain bike frame bag is made of 600D Oxford, which is waterproof, durable, and anti-scratch. The seam-sealed zipper can stand up to thousands of zips and unzips, and effectively prevents rainwater from entering and protecting belongings dry and safe.
-
The mountain bike frame bag is a bag that can be installed under the seat or near the handlebar of a bike. It has loops all around the bag frame, plus 3 independent hook and loop fastener straps, to secure the bag in place. The bag is versatile and can fit most mountain, road, and commuter bikes.
-
This bike frame bag is ideal for cyclists who enjoy night riding or those who need to commute in the dark. The bag is equipped with a large reflective area on both sides that can reflect light from all directions and be easily noticed. This keeps your night ride safer.
-
This mountain bike frame bag is perfect for a shopper who wants to be able to store their belongings while they are out on a ride. The frame bag has multiple pockets that are perfect for holding a phone, power bank, gloves, sunglasses, flashlight, mini bike pump, bike repair tools, and other accessories. The key hooker helps to keep keys organized and easily accessible.
-
This mountain bike frame bag features a dual zipper opening for easy access to your belongings. The non-slip zipper puller can be easily gripped even with winter thick gloves, making it a great choice for those who enjoy biking in all weather conditions.
NDakter Bike Bag, Bicycle Frame Storage Bag, Water-Resistant Bike Triangle Pouch, Cycling Accessories Pack for Phone, Wallet, Keys, Tools, Use for Road Bike MTB Commute Bicycle Bike Accessories

Key Features:
-
This mountain bike frame bag is made of a water-resistant fabric and features high-frequency seamless welding technology to block rainwater from entering the bag quickly.
-
This mountain bike frame bag is perfect for a shopper who wants to be able to store all of their belongings while they are out on a ride. The bag has enough room to store a phone, small tire pump, mini binoculars, cycling glasses, bicycle repair tools and accessories, dust masks, keys, wallets, and more. This bag will help solve the troubles of long outdoor riding.
-
This mountain bike frame bag is easy to install and quick release with 3 adjustable velcro straps. It can easily fasten on the tube and doesn’t move around even if you ride on a bumpy or rocky road. It also fit most mountain and commute bike. Note: The triangle bag is at a right angle and is suitable for mounting on a bicycle with a right-angle bracket.
-
This mountain bike frame bag is perfect for any shopper who wants protection and durability for their belongings. The outer layer of the bag is made from PU+Polyester, which is wear-resistant, and the middle layer is made from 5mm foam, which protects the contents from being damaged. The inner layer is made from polyester cloth, which is also durable and will protect your belongings from being damaged.
-
This is a mountain bike frame bag that is designed for easy access and durability. It has a reflective trim on both sides for safety, and a slim body design for minimal wind resistance.
ROCK BROS Bike Frame Bag Triangle Bike Pouch Bag Bicycle Storage Bag Small Road Mountain Bike Bag 0.7L Bike Tool Bag

Key Features:
-
This bag is designed to be mounted under the bike tube and is small and aerodynamic. It will not touch your leg while riding. It is compatible with most road and mountain bikes.
-
This mountain bike frame bag has a capacity of 0.7 liters, which is perfect for holding essential items like a wrench, spare tube, patch kit, or small bike pump. Please note that it is a small bag and cannot hold large phones. Please check the bag size before purchasing.
-
This mountain bike frame bag has a large opening for easy access to your belongings, and a smooth zipper for fast access to your belongings.
-
This mountain bike frame bag is easy to install, coming with four straps to mount it on the bike frame. There are many places where it can be custom-fit, so you can choose the way to fit your bike.
-
This mountain bike frame bag is made of durable materials that will protect your belongings while you’re riding. The bag has reflective details for safety, and is ideal for night riding.
BOBILIFE Bike Triangle Frame Bag – Bicycle Cycling Handlebar Front Pouch Saddle Storage Bag for Road and Mountain Bikes (Black)

Key Features:
-
This mountain bike frame bag is a great option for those looking for a bag to hold their tools and other necessary items while riding. The bag is small enough to sit under the frame of the bike, but also has a spacious storage pocket to hold a phone, earphones, and money clip. The other big mesh pocket is great for holding keys, nutrition, and more.
-
This mountain bike frame bag is designed to be slim and lightweight, minimizing wind resistance and preventing legs from hitting the bag during riding. The weight of the bag is less than 2oz, making it ideal for long cycling trips.
-
The bag is easy to install and is adjustable to fit most bikes. It has a big zippered opening for easy access and a universal angle.
-
The bike triangle frame bag is made of upgraded polyester fabric, which is water-resistant and strong. It helps protect stored items and is easy to clean by wiping the surface.
-
The bike bag can be used as a mini handbag, clutch bag, waist bag or mini traveling bag. It is made of durable materials and has a lot of compartments to store things in.
ROCKBROS Bike Top Tube Bag Bicycle Front Frame Bag Waterproof Bike Pouch Pack Bike Phone Bag Cycling Accessories Pouch for Mountain Road Bike

Key Features:
-
The bag is large enough to store a variety of items that a rider might need while out on a ride, including a wallet, energy gel, inner tube, mobile phone, gloves, repair bike tool, and power bank. The bag comes in two sizes, with the larger size measuring 9.25 x 4.13 x 2.55 inches, and the smaller size measuring 8.48 x 3.35 x 2.16 inches.
-
The frame bag is made from 840D nylon, which is durable and abrasion-resistant. The stiff sidewalls help the bag retain its shape, making it steady.
-
The mountain bike frame bag is made of waterproof TPU material and has an adhesive waterproof zipper. The inside of the bag will not get wet, so you can enjoy a cool ride.
-
This mountain bike frame bag is designed for comfort and convenience. It has a long, slim body that allows you to ride more smoothly and comfortably. It’s portable and easy to take with you when you’re away from your bike.
-
The mountain bike frame bag is designed to be easily installed on your bike with an adjustable hook and loop design. It is also suit for more size MTB road bikes.
ROCK BROS Bike Bag Waterproof Top Tube Phone Bag Front Frame Mountain Bicycle Touch Screen Cell Phone Holder Pouch Compatible with iPhone X, 8 Plus 7

Key Features:
-
This mountain bike frame bag is perfect for those who want to be able to easily access their smartphone while riding. The transparent TPU film window allows for easy touch access, and the headphone hole at the bottom of the bag lets you enjoy music on the go.
-
This is a mountain bike frame bag that is made of carbon composite material and has sealed zippers for a waterproof closure. It also has a sun visor to help you see your phone screen clearly even in strong sunlight or on a rainy day.
-
This mountain bike frame bag is easy to install, with long straps that hold it securely in place on the top tube and frame. It won’t move around, even on rough or bumpy roads.
-
The bag has two sides, each of which is large enough to hold items like a wallet, phone, keys, cycling glasses, CO2 inflator bike pump, multi-function repair tool, gloves, portable bike locks, and snacks.
-
The bag is made to fit a variety of bikes and has a section for holding a cell phone. The phone section is designed to fit phones that are 5.8 inches or 6.2 inches.
ROCKBROS Top Tube Bike Bag Bike Front Frame Bag EVA Bicycle Bag Bike Accessories Pouch Storage Pack Water Resistant Bike Phone Bag Below 6.2″/6.5″ for Mountain Road Bike

Key Features:
-
This mountain bike frame bag is made of durable EVA 3DShell material, so you never have to worry about it being squashed or broken. It’s a great bag for storing your bike while you’re on the go.
-
This frame bag has a large storage capacity, and can hold a mobile phone up to 6.2 inches, or a larger phone up to 6.5 inches. The main compartment has two net pockets inside, and can hold your cell phone, wallet, keys, small tools, energy bar, gels, or mini pump.
-
This mountain bike frame bag is made of water-resistant Carbon fiber PU surface material, which is also abrasion proof and durable. It is equipped with a double sealed zipper to protect your phone and tools from small rain.
-
This bag is easy to install, and can be attached to most bikes. It is made of durable materials, and has three strong adhesive hook&loop straps.
-
This mountain bike frame bag is designed to be sleek and not touch your knees while you ride. It is also effective in preventing any type of problem that could occur while you are biking.
Mountain Bike Frame Bag FAQs
1. What are the different types of mountain bike frame bag?
There are several different types of mountain bike frame bags, including hardtail bags, full-suspension bags, and downhill bags. Hardtail bags are designed for use with hardtail mountain bikes, and usually have a single compartment for storing tools and other small items. Full-suspension bags are designed for use with full-suspension mountain bikes, and usually have two compartments, one for storing tools and other small items, and one for storing a spare tire. Downhill bags are designed for use with downhill mountain bikes, and usually have two compartments, one for storing tools and other small items, and one for storing a camera or other gear.
2. What are the benefits of using a mountain bike frame bag?
Mountain bike frame bags are great for carrying extra gear and supplies on long rides. They are also helpful for keeping your belongings organized and protected from the elements.
3. How do you choose the right mountain bike frame bag for your bike?
The best way to choose the right mountain bike frame bag for your bike is to first determine what size frame bag you need. You can do this by measuring the length and width of your bike’s frame. Once you have these measurements, you can then compare them to the dimensions of the frame bags offered by different manufacturers.
4. How do you install a mountain bike frame bag?
There is no one-size-fits-all answer to this question, as the installation process will vary depending on the specific frame bag you have. However, in general, you will need to remove the seat and/or handlebars from your bike, as well as any other accessories that might get in the way. Once everything is out of the way, you will need to locate the frame bag’s mounting points and attach it accordingly.
5. What are the best mountain bike frame bags on the market?
There is no definitive answer to this question as it depends on personal preferences. Some of the more popular brands include Osprey, CamelBak, and Deuter.
Conclusion
There are many great mountain bike frame bag on the market. Our list of the best mountain bike frame bag will help you save time researching and choosing the best one for you.