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NAHBS News: TIG – Baum:

Construction – TIG

Baum Cycles

Ristretto – Richard Gearing, UK — Concept — New design with constant diameter seat stays and new chainstay and dropout design to allow greater comfort, stiffness and installation of the new electronic groupsets. Modern, oversize steel frame to rival the stiffness of current carbon race bikes (44.5mm down tube, 35mm top tube, 35mm seat tube, 25.4mm chainstays, 16mm seat stays) The bicycle matches the customer’s existing Corretto in geometry, but with more snap under acceleration for shorter rides. The finish also matches the customer’s existing Corretto. The stainless steel chain stays and seat stays allow this section of the frame to be finished as brushed stainless steel. This is a more resilient and repairable finish that suits an area of the bike that is prone to stone chips and chain damage. — Material — Custom blend of steel and stainless steel tubing (44mm down tube, 35mm top tube, 35mm seat tube with 31.6mm seat post) Pre treated with phospate/chrome seal process tested to 1000 salt spray hours. Chainstays formed in house. Custom Baum stainless steel dropouts Stainless steel head tube with stainless steel inserts Custom Baum bottom bracket Carbon fork Stainless Steel GT style head badge. PPG Automotive paint — Design — The proprietary dropouts and chainstays are a new design that Baum is releasing at NAHBS. In line with our overall design philosophy, they are designed for minimum weight with no compromise of functionality and little regard to cost. Aesthetics follow as a natural result of function. Extensive machining to reduce weight – internally relieved head tube, custom designed bottom bracket with large breather holes, butted tubing, custom designed dropouts. Large tube diameters with butting to improve stiffness without a weight penalty. Carbon sleeve in the seat tube to fit a 31.6mm seat post, a readily available size. Scalloped and bi-ovalised chainstays Extensive use of stainless steel, particularly at points where an unpainted finish is preferable (dropouts, chainstays) or there is increased chance of corrosion (bottom bracket). TIG welded. — Construction Process — Each bike is made from start to finish in one hit with several people being involved in the manufacturing process. We do not pre-butt and pre- mitre tubes because each bike is highly customised. Our team takes a lot of pride in building desirable, high quality bicycles in an efficient manner. We have created a production system that allows for customisation, efficiency and high quality. Customisation means each bike has custom geometry, tubes, finish and parts. The tubes are selected from a range of diameters (44.5mm, 38mm, 35mm for the down tube for example) which can be butted to a range of wall thicknesses down to 0.6mm. There is a wide range of paint schemes from which to choose and there are 33 standard colours and tens of thousands of custom colours. Our production systems must be flexible enough to allow for this customisation and to incorporate all our models and design changes that happen over time. They must also allow us to be as efficient as possible. We achieve the efficiency and flexibility by designing jigs and machining stations that are used for one process only (e.g. drilling bidon holes) and have a wide range of adjustment. High quality is a combination of getting the same output every time and being able to control what that output is. For example, if an angle is to be 30.7 degrees, I want the output to always be 30.7 degrees and I want to be able to control whether it is 30.7 degrees or 30.8 degrees. Our custom built machining stations and jigs ensure the that desired high quality can be achieved with ease. — Finish — All paint, no decals used Flow coated for a smooth finish Painted in house Matching post and stem — Delivery Process — Delivered to the UK as a complete bike. — Special Notes — For us this is an exciting bike to bring to NAHBS because it is the debut of our new chainstay design, dropout design and headbadge. All these have been a long time coming and are the culmination of the work of many people, especially Darren Baum.

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