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Castelli Mens Core 2 Tri Short

Men's Core 2 Tri Short

Mfg PartNum:
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Dual core performance.

Updated with new fabrics and features, the Core 2 Tri Short from Castelli is your perfect foundational piece of tri apparel. Featuring a highly breathable, lightweight construction, these shorts provide the optimal amount of compression for training runs or short-distance races. Inside, the Core 2's feature a lightweight, non-intrusive liner without padding for running comfort and riding support.

Note: Castelli tops and bottoms are designed with a performance cut that often runs smaller than that of other manufacturers. Consider sizing-up one size to ensure a comfortable fit — e.g., if you normally wear a Medium, select a Large in Castelli. Feel free to contact us with any questions or concerns.


  • Stretch short for run training and short-distance races.
  • Pace 3 Lycra fabric.
  • Lie-flat GIRO3 Elastic.
  • Liner without padding for running comfort.
  • Weight: 97 grams.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

Discount Codes are not applicable to Closeouts.

This product is NOT Eligible for VIP Points.


Style Type: Tri Shorts 

Black - Medium

Mfg PartNum: T18113010-3 

Black - Large

Mfg PartNum: T18113010-4 

Black - X-Large

Mfg PartNum: T18113010-5 

Black - 2X-Large

Mfg PartNum: T18113010-6