The mission was to build a fast, capable roadbike. An allroad, cyclocross, endurance call it how you want. No gravelbike tank and no touringbike either. It should be able to handle fast road rides, twisty descends and fit 33c cyclocross tires to have fun drifting on muddy trails during winter. When in need of a 650b 55mm tire monster I happily ride my mountainbike. This bike should "just" be a more robust personalized version of my old trek crockett. As you can probably tell the look is inspired by English Cycles, FES Track bikes and Weismf. The geometry is pretty much copied from Treks boone... Just to get one important thing out of the way. Let's all agree that straight non sloping toptubes look nicer! We can all agree on that? But I have short legs end of the discussion... When I showed Njazi from Scampi Cicli the drawings he said: "That's a nice looking womens bike! Is it for your girlfriend?". The special headtube construction has a square cut out window for the stem to fit trough. This aero cockpit style was something I had only seen with custom stems before. Unfortunatly they look very bulky and outdated. This might be fine hidden under massive timetrail bars but not on a road bike. Ritchey's elegant aero stem was an easy pick. An other special detail is the seattube. It has no visible external seat clamp or even a bolt. Because of the dropped seatstays there is a lot of punktual force on the seattube that is normaly suportet by the toptube on the oposite side. To disperse this pressure points the sleeves were nessesary. In my opinion sleeves only look nice with a carbon seattube slided through. We discovered that there is no way to integrate or hide them. The solution is to embrace and accentuate the sleeved look even on a full steel frame. For this process Wim heated those sleeves to get the amazing blueish rainbow finish like on exhausts and then sanded of the blue from the seattube. This gave the desired contrast without the use of a bonded carbon seattube. To complete the look and go the extra mile Kolb Rahmenbau even brazed a sleeve at the bb area so that the optical ilusion makes you think a separate seattube was inserted in to the sleeves of the main frame. The cable routing was another big decision to take. After seeing Claudias prototype Stelbel with internal cables on a basic sleek stem and headset it was tempting to go full internal. It would have matched with the aero cockpit style but I realy do enjoy maintaining my bikes and I can proudly say that I never had to replace a headsetbearing in my entire life. I enjoy the meditative process of cleaning and regreaseing bearings regularly. Beeing forced to re-rout the brakehose and bleed the brakes are some additional steps that will certainly not increase my motivation to regularly perform headset services. On a sunny weather roadbike I would not hesitate to get the clean integreation but on this allweather beast the "cables" are outside of the stem and headset. The frame was specialy designed for shimano 12speed di2 which is ''semi wireless''. So there are no holes for a mechanical Sti. The unfinished industrial raw style of a bare frame for me personaly is perfection. It highlights all those hours of labour that went in to smoothening the fillets. Painted steel frames hide a lot of what is going on. The challenge with columbus spirit tubing is they will start to rust. Even many layers of clearcoat or clear powdercoating can't stop corrosion. According to some forums a new process called cerakote seems to be the only possible solution. Columbus doesn't give any reliable recomandations about techniques, paint or the amount of coats. Patrick from Dreier Cycles in Zurich told me one coat of cerakote should be enough. Just to be on the safe side I asked him to do two layers of cerakote.m. For some painting engenier reason I don't know he even did 4 coatings of ceracote. It looks like raw and is only 0.08mm thick hard ceramiccoated. Swiss winters should have no chance against bulletproof cerakote but only time will tell how this paintjob realy lasts under real world conditions. I'm stoked on how this build came out and can't wait to explore some places and hunt some new KOM's on it. See you out there on the streets, in the woods and on Strava.
Wim Kolb from Kolb Rahmenbau fillet brazed custom frame with Columbus max toptube. 38mm spirit downtube. Custom spirit headtube, chain- and seatstay, T47bb and pmw stainless x12 Syntace dropouts with Shimano direct mount hanger. Weight transparency data: -Raw unpainted frame 2260g -Painted frame with 4x 20µ Cerakoatings (0,08mm total) 2310g
Carbon Brother Cycles Road Fork / Axle-to-crown 381mm / Offset 45 / tapered 1 1/8 – 1 1/2″ / 100x12mm CARBON-TI X-Lock EVO M12x1.5Px120mm Axle / Hope EC44/40 lower bearing 52mm 40mm 45&45 / Custom adapted ZS44/28.6 silver
Ultegra FC-R8100 50/34 165mm / Chris King T47i 24mm Ceramic matte slate
XTR PD-M9100 tuned with Meti grade 5 titanium axels and 686 6x13x5 ceramicspeed coated bearings or stock Dura-Ace PD-R9100
Cassette Dura-Ace CS-R9200 11-34 / Chain "Dura-Ace" XTR CN-M9100 waxed with silca secret hot blend wax
Ultegra Di2 RD-R8150 / FD-R8150 / ST-R8170 with Y63X98050 Ti clamp band unit
Pro Carbon 400mm / Custom Ritchey Chicane WCS 110mm with tubus tara Ti custom drilled garmin mount
Pro Carbon / Thomson Masterpiece 27,2 with Custom long Di2 wedge handmade from Rob English tuned with smud-carbon cradle and titanium hardware
Dura-Ace BR-R9270 front / XTR BR-M9110 rear because the XTR bleed nipple is not sideways. The new 9270 bleed boss is on the outside and covered from the lowered seatstay so it would be mandatory to dismount the brakecaliper to bleeding the system. BCA Yoda Centerlock 240/160mm rotors
Nextie Carbon 50mm NXT50GX ERD541mm 425g 50x29x22mm laced with 24 Sapim CX-Ray to DT-SWISS 350 with black Sapim polyax 12mm brass nippel and Sapim 0.6x9,5x14 mm stainless plates / Vittoria Corsa Control 28c or Vittoria Terreno Mix 33c with Latex tubes
Nextie Carbon 50mm NXT50GX ERD541mm 425g 50x29x22mm laced with 28 Sapim CX-Ray to DT-SWISS 350 with black Sapim polyax 12mm brass nippel and Sapim 0.6x9,5x14 mm stainless plates / Vittoria Corsa Control 28c or Vittoria Terreno Mix 33c with Latex tubes
2x King Cage Titanium / plenty of Pro-Bolts drilled titanium racebolts / Meti Titanium Pedal Axels from italy / Bike-Attitude CNC Lockrings /
Maintanance Intervalls: -grease seatpost every 12 month, -apply body cavity spray every 12 month. Total weight 9.6kg in CX mode and 9,4kg in road mode. Next Paintjob will be a purpleish blue on the front triangle with a dirty sprinkled fade to a dark grey rear triangle. Fork and seattube will stay classy in semi-gloss black.
Click a link below to see past stages of this bike.
Added by ianiscaratti. Last updated 8 days ago.