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Product guide

Eyein Bike Triangle Frame Bag, 1.5L

The Eyein Bike Triangle Frame Bag is a compact cycling pouch listed with 1.5L capacity, reflective detailing and adjustable straps. Its slim shape and small stated capacity suit essentials such as a phone, cash or repair tools rather than bulky kit.

At a glance

Three adjustable straps are described for fitting around the top and seat tubes, with alternative front or rear mounting positions.
A reflective surface is described on both sides, intended to reflect light during night riding.
The listing describes a large zip opening, internal layered pockets and a key hook for organising small items.
A slim under-top-tube shape is intended to reduce leg contact while riding.

Price

£12.99Save 19%

Reference price: ~~£15.99~~

Price checked: 12 Nov 2026

View offer

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Pros and cons

Pros

Lightweight at 175 Grams, with a stated 1.5L size suited to small ride essentials.
Adjustable straps and multiple loops allow the claimed fitting position to be changed.
Reflective panels and internal organisation features are useful for regular commuting or day rides.

Cons

The compact capacity is limiting for larger accessories or riders carrying more than essentials.

Technical specifications

17 specifications

Identity
Brand	Eyein
Colour	Black
Vehicle type	Bicycle

Capacity and design
Capacity listed in product details	1 litres
Size listed	1.5L
Compartments	4
Pocket description	Zippered Pocket
Closure	Zipper
Handle	Web Handle
Shell type	Soft

Dimensions and installation
Dimensions	22.5L x 15.5W x 5.5H centimetres
Weight	175 Grams
Mounting type listed	Handlebar Mount
Strap type	Adjustable
Fit type listed	Universal Fit

Materials and protection
Material	600D Oxford fabric
Water resistance	Water Resistant

What to know before buying

Listing details to confirm

The listing is inconsistent about capacity: product details say 1 litres, while the size field and product description claim 1.5L. Water resistance is claimed, but the listing says not to soak the bag for a long time. Confirm the capacity and fit against your bike frame before purchase.

Who is it for?

A good fit for

Cyclists who want a small pouch for items such as a phone, cash, keys or basic repair tools.
Commuters and day riders looking for strap-on storage with reflective detailing.

Less suited to

Riders needing space for bulky clothing, larger tools or substantial touring supplies.
Anyone needing a bag guaranteed to remain dry during prolonged immersion.

Eyein Bike Triangle Frame Bag, 1.5L · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 1,290 ratings

5 stars74%74%
4 stars17%17%
3 stars7%7%
2 stars1%1%
1 star1%1%

Customer feedback reports positive impressions of build quality, usable space for essentials, water resistance, design and portability. Some customers find the size suitable, while others say it is smaller than expected. That mixed size feedback matters because the listing itself gives conflicting capacity figures, so it is best suited to buyers who need compact storage rather than a large gear bag.

Positive themes

Customer feedback describes the bag as well-made and appreciates its design and portability.
Customers report that it holds ride essentials and offers good water resistance.

Mixed feedback

Feedback on size is mixed, with some finding it suitable and others saying it is smaller than expected.

Frequently asked questions

What capacity does the Eyein frame bag have?

The listing gives conflicting figures: the product details say 1 litres, while the size field and description claim 1.5L. Check the selected listing for the intended capacity.

How does the bag attach to a bicycle?

The feature description specifies three adjustable fastener straps, with two on the top tube and one on the seat tube. It also describes changing the position using the loops and detachable straps.

Is the bag waterproof?

It is described as water-resistant, with a seam-sealed zipper claim. The listing also cautions against soaking it for long periods, so it should not be treated as immersion-proof.

What can it hold?

The listing suggests small essentials such as a phone, cash, keys, gloves, sunglasses, a mini pump or repair tools. The conflicting capacity figures mean available space is not fully clear.