Issue simply dropped what could be the boldest aero bike we’ve seen in years. We’ll…we’ve truly seen it already, and it’s already profitable WorldTour levels. However, that is the primary time that we’ve seen it formally, with a reputation, explination and technique to the insanity. You’ll be able to learn all about it in our speculative story right here, and a extra formal Eurobike greeting right here, however nothing could possibly be as wild as whats on paper for the Issue ONE.
The brand new Issue ONE isn’t a refinement of the manufacturers present aero bike, the OSTRO VAM. Its an entire new monster, and pushing what a UCI-legal street bike may be. Its just about in its personal catagory within the Issue street line. Plus, in accordance with Issue’s personal engineering information and WorldTour testing, it’s not simply sooner than the OSTRO; it’s sooner than all the pieces within the class.
Issue sums it up in a single line: “Any sooner, and it might be unlawful.” Barely heavy phrases in a sport consistently trying to outrun its dopping previous…However this story IS concerning the bike, and the Issue ONE is coming in sizzling.
Born From a Rule Change
The Issue ONE story started when the UCI relaxed dimensional constraints on the fork field. Most manufacturers noticed a minor alternative; Issue noticed a wide-open hall to push the boundaries of aerodynamic design. The design seems to be very simlar to the Hope Observe bike and the Stromm Raktt . All have the identical thought on the entrance finish, however its greater than only a fork improve.
Backed by classes from the Issue HANZŌ Observe mission and the OSTRO VAM, the ONE was developed solely in-house. Issue designed, prototyped, and refined the platform underneath one roof, permitting them to alter small designs rapidly with out ready for contract-factory tooling. This inhouse (and secret) design allowed Issue to suprise everybody with a close to manufacturing prepared bike at this years Critérium du Dauphiné.
Aero Weaponry: Bayonet Fork + Ducted Chin Fairing
The ONE’s entrance finish is its defining function. Issue widened and pushed the fork legs ahead, then added a ducted “chin” fairing beneath the pinnacle tube. This construction controls the soiled “spillover” airflow coming off the entrance tire. Probably the most vital sources of turbulence on aero race bikes.
Issue Wind-tunnel and CFD testing confirmed:
Airflow stays connected longer and deeper into crosswinds
Drag stays low throughout a large yaw vary
Rivals stall aggressively above 5–10 levels of yaw, whereas the ONE “continues producing usable thrust”.
Was it enought to note? Effectively, one rider observed instantly. Throughout testing, Jake Stewart reported a definite “elevate” sensation round 50 kph because the bike’s aero profile activated. That sensation aligns, with tunnel information displaying a considerable drop in drag at greater yaw angles.
Geometry Constructed for Trendy Race Positions
Right this moment’s racers are more and more rotated ahead: saddles shoved forward, shorter cranks, narrower bars, longer attain. It comes from a number of wind tunnel testing and the UCI outlawing the “puppy-paw-position”. Riders have been compelled to scale back their frontal space in several methods.
Meaning spending extra time with the forearms on the bars, consistent with the shifters. It’s a quick place, however not the very best for steering. Issue and most riders agree that these positions can destabilize dealing with. So on the brand new ONE Issue up to date the geometery to excel to steer higher in these purposes.
What’s Up With Match?
Issue constructed the ONE’s geometry round fashionable racing positions, beginning with a decoupled handlebar mount that allows excessive attain with out counting on customized 140–150mm stems.
They paired this with an elevated bottom-bracket drop to stabilize the rider’s raised heart of gravity created by shorter cranks and bigger tires.
Each measurement makes use of an identical steering geometry. Its a fairly an unusual transfer and one that ought to eradicate the dealing with compromises usually present in smaller frames. If that wasn’t sufficient, riders can alter thier seat tube angle, starting from 73.5° to 77°. Letting riders undertake an aggressive ahead place with out sacrificing stability.
Nonetheless, with all of the up to date match and geometery tweaks, Issue says “the ONE preserves the core coordinates of the OSTRO VAM”. Mainly that means, when you trip a OSTRO VAM, you must really feel proper at residence on the brand new ONE.
Issue ONE Tech Overview
Body: 900g (measurement 54)
Fork: 540g bayonet design with ducted chin fairing
Cockpit: 210g built-in system (measurement 3)
Seatpost: 230g, with zero and 30mm setback choices
Tire Clearance: 34mm measured (optimized round 28mm)
Shifting: Digital solely
Crank Optimization: 165–170mm
Cockpit Choices: Commonplace and Hello-Rize programs with size-specific attain equivalents
Paint Choices: Onyx Black, Nimbus Gray, Blush, Silverstone
Issue ONE Pricing and Builds:
Ultegra Di2 – $10,899 USD / €10,499 / $16,799 AUD / $14,499 CAD
Dura-Ace Di2 – $12,599 USD / €12,099 / $19,399 AUD / $16,799 CAD
SRAM Pressure AXS w/ energy meter – $11,099 USD / €10,699 / $17,099 AUD / $12,899 CAD
SRAM Pink AXS w/ energy meter – $12,899 USD / €12,399 / $19,899 AUD / $17,199 CAD
Campagnolo Tremendous File Wi-fi 13s – $13,199 USD / €12,699 / $20,299 AUD / $17,599 CAD
ONE Premium Package deal (Frameset): $6,899 USD / €6,599 / $10,599 AUD / $9,199 CAD
ONE Premium Package deal w/ Black Inc 62 Wheels: $9,499 USD / €9,099 / $14,599 AUD / $12,599 CAD
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