Stocking Fillers

Castelli Undersaddle XL Bag


Why to buy: Compact and light, made from weather resistant materials. Suitable for carrying a little more than the Castelli Mini. Important bike bits, such as a multi-tool, spare inner tube, mini pump and energy gels.

Available Delivery Options
UK Next Day



Saddlebags are designed primarily to carry what your bike needs and those extras you need. A multi tool, spare inner tube, emergency money and energy gels can be kept inside, for those 'in-case' emergencies.

Castelli's Undersaddle XL Bag is made from water resistant materials, including a water resistant zipper. The bag will repel light showers and road spray, keeping what's inside nice and dry. It fits securely under a bike saddle with the hook and loop adjustable straps and, if you wanted, a light can be attached for night-time visibility. With the mini bag's lightweight, sleek profile, you'll probably forget it's even under there - until you come to need it.

Its internal pocket is perfect for emergency money - you never know when you might need a bus or train back! And don't forget the cake. A sleeve on the outside can hold a mini pump and the strap tightens to hold it put.

Size Guide

Dimensions: 6cm x 15cm x 6cm

Tech Spec

  • Water & stain resistant materials
  • Water resistant zipper & construction
  • Light ~ you won't know it's there until you need it
  • Adjustable hook and loop attachment strap
  • Sleeve on outside for a pump
  • Internal storage pocket
  • Reflective detail
  • Can hold: mini pump, multi-tool, spare inner-tube, energy gels, money
  • Dimensions: 6cm x 15cm x 6cm

Who's Behind It?

Q. What do a 19th century Italian tailor, a designer for the Milan Ballet and the first ever lycra cycling shorts have in common?

A. They are all part of a rich 140 year history that's led to today's most recognised brand in cycling: Castelli.

Throw in a heart attack on a famous Italian climb, family feuds, Olympic gold medals and controversy in the pro peloton and it begins to sound more like a Sicilian soap opera than the backdrop to a cycling brand. But then again Castelli is no ordinary brand.

Today, Castelli's scorpion emblem is arguably the single most recognised in cycling. Iconic is an overused word these days, but the Castelli brand surely qualifies.

We first discovered Castelli on our year long ride through the Americas in 2010, when our founder Liz (pictured) wore Castelli shorts and loved them, so stocking them seemed an obvious choice. But we're almost as captivated by the story behind the name as the kit itself! For the full Castelli story (it's quite a story!), click here.

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