American Bicycle Group (ABG), manufacturer of award-winning high performance bicycles – Litespeed (LS) and Quintana Roo (QR) – has unveiled its all-new PRsix Disc Series of triathlon bikes at the IRONMAN World Championships in Kona, Hawai’i.
ABG notes that disc brakes enhance safety and reliability, and are opening the door to improved wheel designs. With the PRsix Disc, the company adds that there is no longer any restriction on rim shapes and tyre sizes. The PRsix Disc is available in varying colour options – electric blue, neutron, atomic orange, teal, red, black/stealth – and limited colours and sizes are now available. The full line will be available in December 2017.
‘With no-nonsense braking, easy wheel changes, no rim width adjustments, and thru-axles front and rear, the PRsix Disc is stiffer than ever before and virtually eliminates wheel slip.’ New internal brake cable routing (front and rear) makes for a clean and more aero overall profile… ‘The PRsix Disc is ready for new levels of aerodynamics, traction, and aero position comfort while racing at any distance.’
According to ABG engineer Brad Devaney, “The placement of the calipers is unique and no-nonsense, and avoids gimmicks in the way of shrouds and covers. The rotors are incredibly aero efficient, and because of that we’ve chosen not to add surface area and complexity.
“QR remains focused on efficient leading edges of the fork. For the rear brake, we’ve parlayed the LEA technology, which makes the non-drive side chainstay better than invisible. With no leading edge and an optimized ‘sail effect’ surface, we’ve nestled the caliper out of the amplified flow created by our SHIFT+ downtube orientation. I’m super excited to see the linking of technologies integrate so well in our latest design.”
“I’m thrilled about what we have done here,” added Peter Hurley, President, American Bicycle Group. “Our engineering staff has created a bike that is unlike any other in the market. The disc configuration they developed is a huge step and means that changing rim shapes no longer requires brake adjustment. We think it’s the best design ever.”
The PRsix Series, including the Disc, are billed as ‘nearly do-it-yourself bikes when it comes to mechanical fixes and shipping’. ABG adds that there is no need to pay for specialized services when only two sizes of Allen wrenches and a basic knowledge of bike mechanics is needed… ‘Easy to disassemble, ship and reassemble.’
The new PRfive and PRsix Series bikes are painted and assembled at ABG’s 40,000 sq ft facility in Chattanooga, Tennessee. QR is offering a frameset for US$4,295 and has two bike versions – Shimano Ultegra Di2 disc with carbon race wheels for US$9,595 and Shimano Dura-Ace Di2 Disc with carbon race wheels for US$12,495, all of which can now be pre-ordered.
Based in Chattanooga, Tennessee, American Bicycle Group manufactures high performance bikes under two brands: Litespeed (road, mountain and adventure bikes) and Quintana Roo (triathlon-specific bikes). Litespeed’s titanium technology makes it a leading manufacturer of cold-worked, cycling-specific tubesets, which led to a partnership with the Jet Propulsion Laboratory (JPL) to fabricate the wheels’ framework of the Mars Land Rover.
Quintana Roo’s PR Series bikes have built a reputation for their design innovation, aero technology, power-to-weight ratio and components compatibility. The multi-award-winning PR Series – PRsix, PRfive and the most recent PRthree – have been recognized by a variety of trade and consumer organizations for innovation and technology, including: LAVA magazine as Editor’s Pick for Gear of the Year (PRsix, PRfive) and Interbike’s Triathlon Business International (TBI) Triathlon Innovation of the Year Award (PRfive).