Is there enough velcro on the seat post strap to tighten securely?

Yes but the best feature is the clip system that fastens the top under the seat. Totally stops the sway that happens with with packs that fasten with long Velcro strap.

Would I be able to fit two spare tubes (700c x 23-25mm 48mm) in this bag? Or would I need to purchase the large size?

Medium size easily holds two tubes + multi-tool + first aid kit + patch kit etc + 2 CO2 cartridges even without unzipping the expander zipper. But it's nice to have the expansion available in case you need it.

Does an iPhone 11 fit in there? It seems plenty big but someone said an iPhone 6 plus barely fits and this is just a bit smaller

I have an Iphone 11 and it would fit easily in this seat bag. Although I don't carry mine there (I use jersey pocket).

Will a mini pump fit in the medium size saddle bag?

Depends on how much other stuff you pack and on how truly “mini” the pump is. I actually went with another saddle bag and gave this one to my roommate.

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Topeak

Product ID: 60618657

Details

Colour
Fixer 25
Size
M
Brand
Topeak
Material
Nylon
Vehicle service type
Bicycle

⚡QuickClick quick-release system

💧Dupont Teflon water & stain resistance

🔴3M reflective strip + RedLight clip

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€ 62.22

Duties & taxes included

In stock

Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Colour
Fixer 25
Size
M
Brand
Topeak

Description

🚴‍♂️ Gear up fast, ride smart, and stay seen!

SWIFT ON OFF - QuickClick mounting with seatpost strap for effortless attachment and removal
SAFETY IN STYLE - 3M reflective strip and RedLight clip boost visibility for night rides
ORGANIZED ESSENTIALS - Internal pockets keep tools separate and secure from inner tubes
PACK MORE RIDE LIGHT - Expandable design with large openings to fit all your essentials without bulk
RIDE READY RAIN OR SHINE - Durable 1000 denier nylon with Dupont Teflon coating repels water and stains

The Topeak Aero Wedge Pack Fixer F25 is a lightweight, medium-sized bike saddle bag featuring a QuickClick quick-release mounting system for easy attachment. Made from durable 1000 denier nylon with Dupont Teflon coating, it offers water and stain resistance. Its expandable design and internal pockets provide organized storage, while 3M reflective strips and a RedLight clip enhance rider visibility and safety.

Specifications

Manufacturer	Topeak
Brand	Topeak
Model	Aero Wedge Fixer F25
Product Dimensions	20.07 x 10.41 x 11.94 cm; 134.66 g
Item model number	63002252
Manufacturer part number	TC2252
Special Features	Lightweight
Item Weight	134 g

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