Castelli BTW Speed Suit Men&
Castelli BTW Speed Suit Men&
Castelli BTW Speed Suit Men&
Castelli BTW Speed Suit Men&
Castelli BTW Speed Suit Men&
Castelli BTW Speed Suit Men&
Castelli BTW Speed Suit Men&
Castelli BTW Speed Suit Men&
Castelli BTW Speed Suit Men&

Castelli BTW Speed Suit Men's

Regular price$579.90
Tax included.

  • Free shipping on all orders over $100!
  • Low stock - 3 items left
  • Inventory on the way

CFD and significant testing create the fastest road racing suit, optimized for high speeds when the race splits apart.

PUSHING THE LIMITS OF SPEED Military test pilots in the 1960s coined a phrase for pushing the aircraft to its limits, going all in, and risking their lives at the edge. The throttle levers with the knobs or balls at the top were pushed all the way forward against the cockpit wall: Balls to the Wall. BTW is for those days, those races where you never drop out of your 53x11 or 12, when you're sometimes in the gutter or cornering at the limit of adhesion. When you're all in, taking risks. Like the planes that inspired the phrase, the BTW Speed Suit uses cutting-edge research and construction in the pursuit of speed: CFD analysis, 3D test mannequins, fabric research and testing, numerous wind tunnel tests, and then testing in the WorldTour. At the beginning of the research project, we were set to sacrifice comfort in the name of speed, but in the end we kept fully breathable, fully stretchy fabrics. There’s a little more Lycra®, so you won’t stay quite as dry, and the shoulder fabric is slightly heavier. And it doesn’t have the Sanremo front opening, so your pee stops will be a bit more challenging. All that is a small price to pay for an incredible THREE PERCENT total aero drag savings compared to the fastest-in-class Sanremo Speed Suit. That 3 percent is at higher speeds, especially in the 45-65 kph range, when it really counts. You can get the BTW suit in your team graphics through Castelli's custom program, or this stealthy ninja black version to tear up your local Strava segments or group rides.

Product features

  • Made to be the fastest option for high-speed road racing

  • Dimpled shoulder and sleeve fabric for boundary-layer aerodynamics

  • Smooth body for reduced skin friction and laminar flow

  • Premio-based short portion for aero comfort

  • Progetto X2 Air seamless seat pad for all-day comfort

  • 2-way YKK® zipper

  • Lasered tone-on-tone logos at back of leg and stitched scorpion patch at top of back

  • Weight: 242 g

  • Temperature: 14°C - 32°C / 57°F - 90°F

  • Fit: Aero

Delivery Options

Free Delivery On Orders Over $100.00

$6.00 flat rate for orders under $100.00

Expected Delivery Times

North Island: Delivered in 1-2 business days 

South Island: Delivered in 3-4 business days


Items in stock will be ready to collected within 1 hour of your order being placed.

Some items now ship from off-site locations so will be ready for collection within 2 working days.

Pick up times

8.30am - 5.30pm Monday-Friday 
9.30am - 2.00pm Saturday

Please wait to receive an email stating your order is ready to be collected.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.



Awesome delivery, great prices and great service!


Excellent service and knowledge. Went above and beyond to help.


Excellent service and prompt delivery of my purchase.

Recently viewed