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Peak performance with the Castelli Aero Race 8S cycling jersey. Featuring CFD-engineered shoulder fabric and optimised seam placement, this ultra-breathable, race-fit jersey delivers up to a 6% CdA reduction to turn your hard-earned watts into speed.
Peak performance with the Castelli Aero Race 8S cycling jersey. Featuring CFD-engineered shoulder fabric and optimised seam placement, this ultra-breathable, race-fit jersey delivers up to a 6% CdA reduction to turn your hard-earned watts into speed.
Castelli

Castelli Aero Race 8S Jersey in Night Shade / Rosa Giro

£175.00
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If you are not completely satisfied with your purchase, simply return the item or items to us in their original condition* within 30 days of receipt. You must notify us in writing within 14 working days of placing your order, by post or email of your intention to do this.

RETURN ADDRESS:

Returns Department
7hundred Ltd
68 Peascod Street
Windsor
SL4 1DE

We will issue a refund, credit or exchange the item for a different size / colour if preferred. Delivery charges are only refundable if you have canceled your entire order within the 7 day Cooling-Off Period or where the goods are faulty and a refund is made.

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(Note: For larger items such as wheels, smart trainers, this charge may vary and you will be informed of the price before the item is sent).

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Sorry, we cannot accept returns of books or software where any seals have been broken or working products that have been used.

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  • The parcel can take up to 7 working days to be processed once received.

* Note: when trying on items of clothing, please ensure that you are not wearing perfume / aftershave or a deodorant which may leave a scent or marks on the item. In the case of cycling shorts please ensure that underwear is worn when first trying them on. The item(s) must be returned in its original packaging with all labels and tags and with all enclosed documentation.

We will be unable to accept the return of any item where there is evidence that these instructions have not been followed.

PLEASE NOTE: For large items such as bikes, trainers and associated large / bulky accessories and wheels, we reserve the right to charge a re-stocking fee of 10% to cover our administration costs. This re-stocking fee also applies to SPECIAL ORDERS for Q36.5 Clothing items where sizing or colours fall outside our in-store ranged collection.

Faulty Item

If the item you received is faulty, please contact us quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return. You have 30 days from receipt of the faulty item to notify us of your intent to return it and a further 30 days in which to do so.

Incorrect Item

If the item you received is not what you originally ordered, please contact us quoting your order number, your name and address, details of the product and the reason for return, and whether you require a refund or a replacement. We will then advise on how to proceed with the return.

All refunds will be given as soon as possible, and usually take the form of a refund transaction onto the card used for the original purchase. At the very latest we will refund your money within 28 days from the day we receive your returned item. In the case of incorrect ordering and undisclosed reasons for return, a credit or exchange may be issued and the customer will be expected to pay the return postage costs.

All returns must be accompanied by a completed returns form and a copy of the original invoice.



You can submit a returns form here:

Returns Form

Castelli Aero Race 8S Jersey in Night Shade / Rosa Giro

Season:2026

Brand:Castelli

Code:CS26008NightShadeRosaGiro

80% of the drag on a cyclist comes from the body.

Drawing on more than a decade of knowledge and innovation in making professional riders faster, the Aero Race 8S Jersey is the result of using the most modern methods and fabrics to create the fastest jersey Castelli has ever made.

The Aero Race 8S is Castelli's eighth-generation aero race jersey and, as of the current model year, the brand's fastest short-sleeve. The 'S' denotes Speed, and the headline number is a claimed 6% CdA reduction versus the previous Aero Race generation - a meaningful step over an already-aero garment and one of the bigger inter-generation drops Castelli has reported on a single piece.

Two construction decisions do most of the work. First, the sleeves are long - almost elbow-length - with a raw-cut edge that lies flat against the skin, eliminating the traditional sleeve hem as a tripping point for the boundary layer. The outer face of the sleeve uses an unperforated fabric with thick, widely spaced ridges set about 1 cm apart; the structure functions as a textured trip strip to manage airflow over the upper arm at race speeds.
Castelli quotes an aero-optimal envelope of 30 to 55 km/h.

Second, the seam placement was developed using CFD modelling to put the joins where airflow can tolerate them and to keep the smooth, ridged fabric on the leading surfaces. Behind the aero front face, the back of the arms and the rear panel use a heavily perforated, largehole fabric, closer to a colander than to a conventional jersey weave, which is critical to keeping the jersey wearable in heat. The shell is - like the Espresso 2 - Air_O Stretch, super soft and comfortable but in a tighter, more compressive build.

Built for pro level performance in the heat, the rated temperature range is 18 to 36 °C with weight, depending on size and colour batch, between roughly 122 and 138 g (claimed 127 g).

Pocketing follows the conventional three-rear plus zip layout, but the cut is short, snug and sits flush against the back when occupied. Fit is race-cut: shorter front, longer drop tail, narrow shoulders, sleeves long enough to overlap with the brachial fabric on most modern aero kits.

Sizing tends to run small generally, and the 8S is at the tighter end of that.

Rider profile: Race-day jersey for riders who care about steady-state aero gains and are happy in a true race fit.

Features:

  • CFD-based fabric placement and seam construction
  • Engineered shoulder fabric used specifically to reduce drag at race speeds, with as much as 6% savings in CdA
  • Bonded sleeve endings for comfort
  • Lightweight body fabric for optimal cooling, breathability, and comfort
  • Elastic waistband to keep jersey in place and support loaded pockets
  • 3 rear cargo pockets
  • Reflective tab for added safety
  • €203.02
    EUR
  • $275.51
    AUD
  • $269.73
    CAD
  • $336.13
    NZD
  • $198.37
    USD
  • CHF154.98
    CHF
  • kr2,193.27
    SEK
  • kr24,336.09
    ISK
  • kr1,517.55
    DKK
  • kr1,844.13
    NOK
  • ¥31,158.55
    JPY
  • Sizing Information

    Castelli Size Guide

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