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Kevin of Steel has been on sabbatical for a while. Not because Curve forgot about it. More because Curve wanted to get it right.
The new KOS4 keeps the same spirit as the last Kevin of Steel: a reliable, versatile, heat-treated chromoly steel gravel bike built for real adventures, long rides, rough roads, bikepacking, commuting, and whatever else you define as gravel this week.
But it has been brought properly up to date.
The geometry (geo chart found here) now follows Curve's current titanium GXR4, Curve's flagship gravel platform. That means a proven gravel fit, wider tyre capability, improved handling, and a higher front end on the larger sizes compared with the previous Kevin of Steel. The size range has also grown, with XXS and XXL now available in limited numbers.
Steel is not the poor cousin of titanium at Curve. Curve have always said, Superman was the Man of Steel, not the Man of Titanium. Steel has its own beautiful ride quality, its own feel, and will always deserve its own place in the Curve range.
The KOS4 features increased tyre clearance, clearing up to 700c x 56 mm / 29 x 2.2” at the rear, with room for even more up front — up to 29 x 2.4” with the Ride 415 fork. KOS4 also gets internal dropper post routing through the bottom bracket shell, so you can get low if the trail gets rowdy.
Now with a single sided yoke for increased stiffness through the bottom bracket area.
Mounting points have also been improved. The KOS4 includes rear rack mounts, fender mounts, top tube bento mounts, and five bidon mounts, including the offset down tube mounts popularised on Curve's GMX+ model. The offset and underside down tube mounts allow riders to run three bottles while still using a full-size frame bag, even for smaller frame sizes, giving you more range on bikepacking adventures.
Including the Ride 415 VGM fork that has the ability to carry 8kg per fork leg, meaning you can be fully loaded for any adventure on the new KOS.
At the back, bespoke cast dropouts bring SRAM UDH and Transmission (T-type) derailleur compatibility to the steel Kevin platform, just like its titanium cousin. Kevin has always been versatile. Now it is more compatible with modern drivetrains too.
Curve are relieved and proud that The Kevin of Steel is finally back from sabbatical! Now stronger, more capable, and even more reliable.
“Kevin of Steel has always been a special bike for us. Steel is not the poor cousin of titanium. It has a beautiful ride quality of its own. Curve were not prepared to bring Kev back until Curve's testing standards were met, and that took a long time. KOS4 is still Kev, just brought right up to date.”
— Jesse Carlsson, Curve Co-founder
FRAMESET: $2,999 AUD inc GST
Including:
Kevin of Steel 4 Frame
Ride 415 VGM Fork
Axles
Hanger
Headset
Cable Guides
Seatpost Clamp
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To order call 07 3368 2324.
