Brother Cycles Kepler Frames - Teal is Real

Brother Cycles Kepler is the foundation for a really good gravel or road bike. Its classic good looks and modern geometry mean the frame can be built up as anything from a fast commuter to a more relaxed road bike or a dedicated gravel bike. That versatility is Kepler’s greatest strength - a steel frame that feels equally at home on asphalt and gravel, and can be built in many different ways depending on how you want to use the bike.

This generation of Kepler received several welcome updates. The lugged steel fork has internal dynamo cable routing and three mounting points on each fork leg. The frame has internal rear brake routing, an integrated seatpost clamp, a third bottle cage position beneath the downtube, and a metal Brothers Oak Leaf badge on the head tube.

The frame is made from double-butted 4130 chromoly and ED-treated beneath the paint for better corrosion protection. The Kepler can be built with 700C wheels and tires up to 45 mm, or 650B wheels with tires up to 48 mm. Narrower tires make for a fast bike on the road and smooth gravel, while more tire volume provides better grip and comfort when the surface gets rougher.

There are mounts for racks and fenders front and rear, three bottle cage positions on the frame, and extra mounting points on the fork. This makes the Kepler just as useful as a stripped-down gravel bike as it is as a fully equipped commuter or touring bike. The Teal is Real paint fades from teal to warm gray, giving the frame a much more distinctive look than a traditional single-color steel frame. If you want a Brother that leans more toward the road than the Mehteh, but still has room for proper gravel tires and luggage, the Kepler is the natural choice.

Quick Specs

• Model: Brother Cycles Kepler
• Type: Steel frameset for gravel and road
• Color: Teal is Real - teal to warm gray fade
• Frame: 4130 chromoly, double-butted main triangle, ED-treated
• Fork: Lugged 4130 chromoly fork
• Sizes: 50, 52, 54, 56, 58, and 60 cm
• Wheels: 700C or 650B
• Maximum tire width: 700 × 45 mm or 650B × 48 mm
• Rear axle: 12 × 142 mm thru-axle, included
• Front axle: 12 × 100 mm thru-axle, included
• Brakes: Flat mount, maximum 160 mm rotor
• Headset: 1 1/8" threadless, not included
• Seatpost: 27.2 mm
• Seatpost clamp: Integrated
• Bottom bracket shell: 68 mm, ISO threaded
• Front derailleur clamp: 28.6 mm
• Maximum chainring: 48T single, 50/34T double, or 52/39/30T triple
• Bottle cage mounts: 3 positions on the frame
• Fork mounts: Three mounting points per fork leg
• Mounts: Front and rear rack and fender mounts
• Dynamo cable: Internal routing through the fork
• Rear brake: Internal cable routing
• Frame weight: Approximately 2.25 kg in size 56 cm
• Fork weight: Approximately 1.2 kg with uncut steerer tube
• Certification: Tested to ISO 4210