Castelli Undersaddle Bike Bag - Mini

The Castelli Undersaddle Saddle Bag range delivers compact, lightweight storage solutions designed specifically for road cyclists who want to carry ride essentials without compromising bike aesthetics or performance. Available in multiple sizes including Mini, Medium and XL, the range allows riders to choose the ideal storage capacity for everything from minimalist race setups to longer endurance rides.

Constructed from durable water and stain-resistant materials, the Undersaddle bags are built to withstand everyday riding conditions while maintaining a clean, streamlined appearance beneath the saddle. Each bag uses a secure hook-and-loop attachment system for stable positioning over rough roads and fast-paced riding.

The smaller Mini option is ideal for carrying a tube, tyre levers and a compact multitool, while larger Medium and XL models provide additional room for CO2 cartridges, tubeless repair kits, nutrition and ride essentials. Select models also feature external mesh sleeves for convenient mini-pump storage. Cycling Weekly described the Undersaddle XL as “sleek and streamlined” and particularly well suited to road riders carrying essential repair gear only.

Features

• Available in multiple sizes including Mini, Medium and XL
• Lightweight road-focused saddle bag design
• Water and stain-resistant construction
• Secure hook-and-loop saddle attachment
• Streamlined low-profile fit beneath saddle
• Internal organisation pocket
• Selected models include external mini-pump sleeve
• Designed for tubes, tools, CO2 and repair essentials
• Stable fit for road cycling use

Ideal For

• Road cycling
• Fast group rides
• Endurance riding
• Minimalist bike setups
• Carrying ride essentials discreetly