Quick Take
When you need extra cargo space for a long ride, a rear seat tail bag is one of the most practical upgrades you can make. The four bags here range from a compact expandable option to a 40L waterproof rear seat trunk, with a wide spread in listed price. Your main decision is how much capacity and weather protection you need before you hit your budget ceiling.
Before you look at the price comparison, think about how you ride. A daily commuter doesn't need a large tail bag; a compact expandable bag is easier to tote. A long-distance tourer wants more volume and better weather protection. The four bags below reflect those priorities, and the price table highlights the trade-offs.
Listed Price Comparison
| Product | Listed Price | Price Bar | Key Details |
|---|---|---|---|
| 40L Motorcycle Tail Bag Rear Seat Luggage Storage For Touring Road King Glide | USD 89.99 | Semi-waterproof, reflective strip, removable boards | |
| VEVOR Motorcycle Tail Bag Expandable Rear Seat Luggage Storage Backpack 22-34 L | USD 41.90 | Expandable 22-34 L, splash-resistant, universal fit | |
| Motorcycle Tail Bag 40L Expandable Waterproof Rear Seat Trunk Luggage/Rack Bag (with Side Straps) | USD 119.39 | Side straps, 40L | |
| Motorcycle Tail Bag 40L Expandable Waterproof Rear Seat Trunk Luggage/Rack Bag (with Rain Cover) | USD 109.99 | Expandable, rain cover |
Decision Matrix
| Situation | Bag to Consider |
|---|---|
| You want the lowest listed price in a compact expandable package | VEVOR Expandable Rear Seat Luggage Backpack |
| You're going touring and want a reflective strip plus semi-waterproof coverage | 40L Touring Tail Bag |
| You want a 40L bag with side straps | SAGA MOTO Rear Seat Trunk with Side Straps |
| You want an expandable bag with a rain cover | SAGA MOTO Rear Seat Trunk with Rain Cover |
Product Notes
40L Motorcycle Tail Bag Rear Seat Luggage Storage For Touring Road King Glide
This black tail bag lists universal compatibility and includes a reflective strip that helps you stay visible in low light. Removable boards inside the bag help it hold its shape, whether you're packing heavy or light. The semi-waterproof, UV-resistant, scratch-resistant finish makes it a practical option for fair-weather touring and weekend rides. The limitation is the semi-waterproof label: it offers some protection from light rain and road spray, but it isn't a substitute for a fully waterproof bag in a downpour. If you want a structured tail bag with a touring focus and a reflective touch, this is a balanced middle-of-the-road pick.
VEVOR Motorcycle Tail Bag Expandable Rear Seat Luggage Storage Backpack 22-34 L
The VEVOR bag expands to give you extra room when you need it and a smaller profile when you don't. The 1680D Oxford fabric with PU leather trim is described as splash-resistant and wear-proof, so it holds up to regular use. The universal fit means you can move it from one motorcycle to another without much hassle. The trade-off is capacity: even at its expanded size, it won't swallow the kind of load you'd need for a multi-day tour. For a compact, affordable rear seat bag that you can detach quickly for carry-on convenience, the VEVOR is the easiest call in this group.
Motorcycle Tail Bag 40L Expandable Waterproof Rear Seat Trunk Luggage/Rack Bag (with Side Straps)
This SAGA MOTO bag uses waterproof construction and side straps that help you secure it to your bike. The listed item weight is 3 lb, which is light for a bag of this size, making it easy to handle when it's empty. The main drawback is that it's priced at the high end of the range; if budget is a primary constraint, you'll find cheaper options in this lineup. For a straightforward, waterproof rear seat trunk with a clean black finish, this SAGA MOTO is a dependable pick.
Motorcycle Tail Bag 40L Expandable Waterproof Rear Seat Trunk Luggage/Rack Bag (with Rain Cover)
This second SAGA MOTO bag is described as expandable and waterproof, and it comes with an included rain cover that adds wet-weather protection. The dimensions list a 10.25-inch height and 16-inch length, giving it a generous footprint for a rear rack. The item weight is listed at 10 lb, which is heavier than the other SAGA MOTO option at 3 lb-something to keep in mind if you're aiming for a light load. If you're willing to carry the extra weight, the expandable, rain-covered design makes it a strong candidate for long-distance touring.
Final Recommendation by Use Case
- For the tightest budget: VEVOR Motorcycle Tail Bag Expandable Rear Seat Luggage Storage Backpack 22-34 L at USD 41.90.
- For touring with a reflective strip: 40L Motorcycle Tail Bag Rear Seat Luggage Storage For Touring Road King Glide at USD 89.99.
- For a 40L waterproof bag with side straps: Motorcycle Tail Bag 40L Expandable Waterproof Rear Seat Trunk Luggage/Rack Bag (with Side Straps) at USD 119.39.
- For an expandable waterproof bag with a rain cover: Motorcycle Tail Bag 40L Expandable Waterproof Rear Seat Trunk Luggage/Rack Bag (with Rain Cover) at USD 109.99.
Pick the one that matches the type of riding you do most. If you're a daily commuter, the VEVOR keeps it light and inexpensive. If you're crossing states, the SAGA MOTO bags bring more weather protection and capacity.
