The reasoning behind this project was simple: Make the best possible race bike using the latest steel technology. The SB/03 is a true Italian handmade product, with the ambition to be a viable alternative to carbon fiber frames and for those who will have the pleasure of discovering (or rediscovering) the incredible dynamic characteristics of steel.

The SB/03 Disc is now available in the new limited edition “Evoluzione” version, with fully integrated cables.
Here the link to the product presentation.
This model is constantly evolving in the direction of maintaining Stelbel production inline with market demands and technological evolution.

Large diameter tubing coupled with Stelbel’s unique rear triangle design gives the frame optimum rigidity, increasing power transfer and road feel. More stiffness has been added thanks to the inclusion of a T47 bottom bracket. This oversized threaded bottom bracket standard eliminates any of the typical drawbacks associated with press fit systems.

On the disc brake version of SB/03, the adoption of thru axles and specific tubing to manage the forces from disc brakes, further increase lateral stiffness and reactivity to rider input.

The combination with hydraulic disc brakes further enhances the features of this model. The adoption of 12mm thru axles contributes to reduced lateral flex, enhancing the rigid rear triangle and our specifically designed dropout.

A tapered head tube has been adopted for maximum steering precision coupled with a  1.5″ fork and integrated headset. We can supply forks from Columbus Tubi, Enve, 3T and WR Compositi.

Cable routing is fully internal, a detail we chose to demonstrate the frame builder’s exquisite craftsmanship and to add a final flourish, both technically and aesthetically.

Each Stelbel frame is unique, exclusively made to measure and comes with custom geometry. You can send us a professional bike fit report or alternatively follow our instructions for completing our measurement form. If you want to visit us in Bergamo, you sure be welcome.

  • Front Spacing100mm
  • Rear Spacing142mm
  • Bottom BracketT47 - M47x1mm
  • Seatpost Diameter27,2mm
  • Seatpost Clamp30mm Clamp
  • Front Derailleur MountBraze-on
  • HeadtubeConical - 1"1/8-1"1/2
  • ForkColumbus Futura Disc
  • Fork Rake45mm
  • BrakeFlat Mount
Custom Columbus Steel
T47Bottom Bracket
1"1/2 DiscSteerer Tube
12mm e-ThruThru Axles
30cTyre Clearance
Flat MountBrake Mount Standart
EPS/Di2Upon Request
1880gFrame Weight

Each and every Stelbel frame is made to measure and designed with a custom geometry. After an order is confirmed and a deposit payment placed, the frame design will start based on the available information and documents (Measurements form, Bike-fit report, …). Customer will be interviewed to better understand riding style, wishes, goals and expectations for the new bike. A frame’s CAD drawing will be shared to be commented, analyzed, refined and eventually approved before manufacturing can start.

How to order

You can place an order directly with us via [email protected] or from one of our official retailer partners. An order is confirmed once a deposit payment is received via wire transfer or Paypal. Shortly after, a document providing an overview of the project details and a cad drawing of the frame will be shared for your approval. Pictures of the finished frame/bike will be shared with you prior to requesting the final balance payment. In case you’re considering coming to visit us in Bergamo to discuss the details of a project face to face, or to pick up your new frame/bike, you will be made very welcome by our team.