Castelli Core Short Sleeve Tri Suit: Tailored Race Suit (£130)
The Castelli Core is a short-sleeved, tailored tri suit with a slim tri pad and flat rear pockets, on sale at Tredz. We have not tested it. This page collects what Tredz lists and the current price.
Available now: Castelli Core Short Sleeve Cycling Tri Suit — £130.00 at Tredz (listed RRP £180.00), correct at time of writing, 11 November 2026.
What the retailer lists
- Pad: built around the slim, permeable KISS Tri seat pad, which Castelli says is comfortable on the bike and barely noticeable on the run.
- Sleeves and legs: elbow-length, raw-cut sleeves and GIRO4 flat leg grippers to aid comfort and aerodynamics.
- Zip: a 3/4 length front zip for venting.
- Pockets: two rear pockets that lie flat for the swim and have room for nutrition.
- Temperature range: Castelli lists use at 15-35°C.
- Sizing: Tredz notes that Castelli sizes small and suggests going up one size from your normal cycling clothing size.
Where it fits for triathletes
The points below are our reading of the listed features, not test results.
- All three disciplines in one suit. Castelli describes it as serving you in swim, bike and run. We have not tested it.
- Check the size. Because the brand runs small, use the Castelli size chart before ordering.
- Price. At £130.00 it is £50.00 below the RRP.
Where to buy
Tredz lists the Castelli Core Short Sleeve Cycling Tri Suit at £130.00 at time of writing, and the link below goes to the same product page.
Related guides
See also our Castelli trisuit review, the best men’s trisuits and the best women’s trisuits.
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