Castelli Unltd Endurance Bibs WWomen's cycling shorts on test

Stefan Frey

 · 30.06.2025

With the Unltd Endurance Bibs W, Castelli has a robust pair of cycling shorts with practical extras in its programme
Photo: Georg Grieshaber

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The Castelli Unlimited Endurance Bibs W are primarily aimed at gravel bikers. Castelli offers robust materials, a special peeing function and practical pockets. But were these Italian bib shorts also convincing in the practical test?

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Castelli can look back on a long heritage in cycling, tailoring the first cycling clothing for five-time Giro champion Alfredo Binda as early as 1910. In 2009, the revolutionary Body Paint trousers were launched on the market, which were made from a single piece of fabric and are believed to be the template for many of today's top cycling trousers.

The new Unlimited Endurance Bibs W, but it also dispenses with unnecessary seams as far as possible. The straps are completely seamless. All other seams are kept as flat as possible. Castelli uses small silicone strips at the leg ends for a slightly better grip.

The silicone strips and seams can pinch the thigh when ridingPhoto: Georg GrieshaberThe silicone strips and seams can pinch the thigh when riding

Castelli Unlimited Endurance Bibs W: Bib shorts with peeing function

Up to this point, the ladies' trousers are very similar to the Men's version, which we also tested. But the box and braces are completely different. The material is also somewhat more robust than the very light and thin men's trousers. The wide, well-fitting straps can be crossed at the front or back, which should ensure a secure and comfortable fit. The Castelli Unltd Endurance Bibs W are also designed as drop-tail trousers, which should make it easier to take a pee break.

The comfortably wide straps can also be crossed at the front if desiredPhoto: Georg GrieshaberThe comfortably wide straps can also be crossed at the front if desired

The new Unlimited Endurance Bibs are also genuine Castelli bibs and have a correspondingly tight cut. If you don't like it too tight, you should choose a size larger. The material of the bibs is comfortable and scratch-free to wear. The leg cuffs are held in place by the silicone prints and do not slip up when pedalling. However, the silicone prints can be felt with every step, which can be a little uncomfortable in the long run. There are also three seams at the ends of the leg cuffs, which can cause some friction.

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Because the straps are set far out at the back, women have a wild card when taking a pee breakPhoto: Georg GrieshaberBecause the straps are set far out at the back, women have a wild card when taking a pee break

Seat pad developed by Castelli itself

Castelli has developed its own padding, which is quite thick and comfortable overall, but is more suitable for bikers with a narrow sit bone distance. Because the padding decreases significantly towards the outside, the area with maximum support is quite narrow. This means you don't always sit optimally supported in the saddle. We would have preferred an evenly thicker shape throughout.

The Castelli pad drops sharply towards the outside and offers little usable widthPhoto: Georg GrieshaberThe Castelli pad drops sharply towards the outside and offers little usable width

The pit stop function, on the other hand, is well done. Taking a pee break without removing your jersey? With the Castelli this is no problem, because thanks to the flexible straps and their special construction, the trousers can simply be pulled down at the bottom. Simple and ingenious.



Castelli Unltd Endurance Bibs W - Price and info

With the Unltd Endurance Bibs W, Castelli has a robust pair of cycling shorts with practical extras in its programmePhoto: Georg GrieshaberWith the Unltd Endurance Bibs W, Castelli has a robust pair of cycling shorts with practical extras in its programme
  • Price169,95 Euro >> available here
  • Weight (L): 173
  • SizesXS-XL
  • Made inItaly
  • Equipmentseamless straps; seamless cuffs with silicone gripper; reflective; 2 pockets
  • Special features2 pockets on OS; drop-tail function for the pee break
  • Upholstery length/width/hardness: 19 cm / 12 cm / medium
  • Leg length (measured from the trochanter major): 28.5 cm

Evaluation & conclusion

  • Wearing comfort (40 %): Grade: 2.5
  • Seat cushion (30 %): Grade: 3.3
  • Equipment (20 %): Grade: 1.6
  • Processing (10 %): Grade: 1.5
  • Overall grade: 2.4

Well equipped and well made, but there are better bib shorts for women in terms of comfort and seat padding.

Like the men's shorts, the Castelli women's shorts are rather small, the material is more robust but cool, the straps are comfortable and equipped with a good pee function, which makes the pit stop much easier. The silicone on the leg cuffs and the seams on the thighs can pinch a little. The padding is rather narrow and could offer more support.

Stefan Frey is from Lower Bavaria and loves the mossy, loamy trails of the Bavarian Forest as much as the rugged rock of the Dolomites. For technical descents, he is prepared to tackle almost any ascent - under his own steam. As an accessories specialist, he is the first port of call for questions about equipment and add-on parts, while as head of copywriting he sweeps the language crumbs from the pages of the BIKE print editions.

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