American Custom Bicycles in Steel, Titanium and Ti/carbon mix
It has been a long time since we attended the North American Handmade Bike Show (NAHBS), so when we decided to make the trip to Sacramento for this year’s show, we knew we needed to bring the best bikes we could. The Ultimate Seven Axiom Disc road bike is one we have made before, but as with all bikes that want to live on the bleeding-edge of possibility, there is a relentless need to push farther, so farther we pushed.
This is a bike focused on speed, a bike that wants to be the fastest road disc bike we could imagine, with every performance upgrade that Seven has to offer and a component spec that supports that core mission. We didn’t forget speed when we did the paint design either. The NAHBS Edition Ultimate Axiom Disc features our limited-edition ‘Prime’ paint scheme, based around the number 7, and a unique hourglass design that reminds you the clock is always ticking.
The technology we’ve put into this bike goes beyond what any other builder is currently doing. It starts with a compact geometry and our XX weight savings package, a whole battery of frame modifications that pull weight from the frame strategically, without compromising performance-oriented stiffness. Added to that is the sublime combination of maximally stiff 1” chainstays for superior drivetrain performance and our moto seatstays which absorb road shock to keep you in the saddle and improve traction on all surfaces. An oversized T47 bottom bracket shell and direct mount derailleur hanger contribute that little bit extra performance in pedaling efficiency and shifting accuracy. Finally, we tuck all the wiring in behind the head tube, seat tube and driveside dropout, to help the bike slice through the air.
For the Ultimate we actually ended up with two different build outs, one with Shimano Dura Ace 9170, the other with SRAM AXS. Both give us top-of-the-line electronic shifting and hydraulic brakes.
We also put together a stripped down version, one still laser focused on speed. That bike is our tough-as-nails Axiom S. We omit the paint and opt for an Ultegra level build out, retaining the 1” chainstays and moto seatstays for their peak performance and to maintain the bike’s clean lines.
Full kit details and pricing below.
An upgrade package to dramatically reduce frame weight. The package includes:
Larger diameter tubes, with thinner tube walls, increase both bending and torsional stiffness by 32% over our 7/8” stays. We hold the weight down by custom butting the tube stock in house.
With these stays, we’ve been able to improve rear tire traction without reducing frame stiffness. We achieve these traction improvements through a combination of more aggressive bend profile, bending in multiple planes (3D), and a new tube butting process. What you get is a seat stay with a more dramatic shape that dissipates multi-directional force, and minimizes weight.
Our Slipstream Di2 wiring upgrade, designed specifically for the newest Shimano Dura Ace 9150 and 9170, and Ultegra 8050 and 8070 components, offers a number of improvements for 2019. We couple it with the industry’s first titanium direct mount hanger for Shimano rear derailleurs. About three times stiffer than a typical aluminum hanger, and tough as nails.
Seven’s MCT paint has a number of unique features. It is available only as “builder’s choice.” Each scheme and colorway is one-of-a-kind and chosen by Seven’s designers. Each pattern is hand laid, and the entire paint process typically takes 20 hours or more. We employ a proprietary color and clearcoat system that is lifetime durable. All MCT schemes include a painted frame and fork, while some schemes also include a painted seat post and/or stem, depending on the designer’s scheme and your riding plans. T47 Bottom Bracket Shell ($95)
Great for performance-minded riders that want to use crank-based power meters with oversized axles and Di2 wiring.