Note: Castelli size their clothing small. For the best fit, go up one size
Forget about what you’re wearing and get your mind in focus. The Castelli Core Tri Shorts are made from Pace3 stretch fabric, which gives excellent muscle support and helps your legs feel fresh for longer. The legs feature flat-leg elastic for extra comfort alongside the KISS Tri seat pad, which allows all out sprints in the saddle.
For those energy boosts, the envelope pocket is perfect for stashing energy gels and bars, and the Speed hooks make it super easy to integrate a Castelli Triathlon top.
We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE to mainland UK, regardless of the size and value.
Please note: bulky products and bikes shipped to outlying UK regions are excluded from free shipping - Click here for more info.
Christmas is one of the busiest time of year for us at Tredz. We will try our best to get your products delivered before Christmas. To help you, please see our last postage dates for first class and 24 hour courier services below:
Any order dispatched on the 22nd & 23rd December will be delivered between 28th December and 30th December.
Choose your delivery country:
It’s easy to return a product with our 365 day, hassle free returns.
We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).
For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.
For more information please visit our Returns & Warranty page.