.arf-pdp { font-family: inherit; font-size: inherit; line-height: inherit; color: inherit; } .arf-pdp h4 { font-size: 16px; font-weight: 700; margin: 30px 0 8px; border-bottom: 1px solid #e0e0e0; padding-bottom: 4px; } .arf-pdp p { margin: 0 0 12px; } .arf-pdp ul { margin: 0 0 12px; padding-left: 22px; } .arf-pdp li { margin-bottom: 5px; } .arf-pdp a { color: #0055cc; } .arf-pdp .note { font-style: italic; font-size: 13px; color: #555; } .arf-divider { border: none; border-top: 1px solid #e5e5e5; margin: 32px 0; } .arf-callout { border-left: 3px solid #111; padding: 14px 20px; margin: 20px 0 16px; background: #fafafa; } .arf-callout .ec-headline { font-size: 15px; font-weight: 700; color: #111; margin-bottom: 6px; } .arf-callout .ec-body { font-size: 13px; color: #444; line-height: 1.6; } .arf-name { display: block; font-size: 14px; font-weight: 700; margin-bottom: 6px; } Get ready to conquer the road less traveled — with nothing hidden inside the frame. The 4130 All-Road frameset in its simplest form. Double-butted 4130 chromoly frame and matching chromoly fork, UDH dropouts, thru-axles front and rear, and completely external cable routing. Double-butted means the tube walls are thicker at the ends, where they're welded and where stress concentrates, and thinner through the middle, where they don't need to be. You get the strength where it matters and shed weight everywhere else — which is what separates a good steel frame from a heavy one. Whether you're hitting gravel, loading up for a bikepacking trip, or building a commuter you'll actually enjoy riding, this is the frame that gets out of your way. Why external routing Internal routing looks clean. It also means fishing housing through a frame, dealing with internal guides that rattle, and occasionally pulling a bottom bracket out to chase a cable that won't feed. Everything on this frame runs outside, where you can see it, adjust it, and replace it. Cable stops and guides are right there. Swapping a shift cable is a twenty-minute job with a set of cutters, not an afternoon with a magnet and a bent spoke. On a frameset that matters more than it does on a complete bike, because you're the one doing the build. The first assembly is faster, and every service after that is simpler. It also keeps the frame cheaper to make, which is the honest reason it exists — this is the affordable way into the All-Road platform. UDH Universal Derailleur Hanger dropouts. A replacement is available at virtually any shop, anywhere in the world — no proprietary part to source after a crash on a trip. It also opens the door to modern direct-mount drivetrains if you ever want to go that direction, without needing a different frame to do it. Room for real rubber Clearance for mountain bike tires on a steel gravel frame: 650b / 27.5": up to 2.4" (60mm) 700c / 29": up to 2.25" (57mm) That's the range that makes this frame worth building twice. A 650b wheelset with 2.1" or 2.4" knobbies turns it into something genuinely capable off-road. A 700c wheelset with something fast turns it into a quick commuter. Same frame, two bikes, one purchase. Actual fitment varies with rim width and tire brand — a 2.25" on a wide rim measures wider than the same tire on a narrow one. The geometry Long chainstays, a slack front end, and a low bottom bracket. Every number here is doing the same job. 450mm rear center across every size — a long rear end tracks straight on loose surfaces and stays planted when the bike is loaded 70.5° to 71.5° head angle — slack by gravel standards, so the front wheel leads rather than darts and washboard doesn't push the bars around 75mm BB drop — low, which puts your weight below the axles and is what makes a bike feel confident in corners and on off-camber dirt 45mm fork offset across every size — consistent steering feel from XS to L The result is a bike that's calm. It won't feel twitchy on a fire road descent and it won't fight you when the surface changes mid-corner. Built on standards you can actually build on Frame & Cockpit 1-1/8" threadless steerer 27.2mm seatpost 68mm BSA threaded BB Completely external routing Drivetrain UDH dropouts 1x or 2x compatible Square taper or external BB, your choice Threaded BB — nothing to press Wheels & Brakes 12x100mm front thru-axle 12x142mm rear thru-axle Flat mount disc brakes 650b or 700c No press-fit bottom bracket to creak. No proprietary seatpost. No internal routing to fight. Nothing on this frame will be hard to find a part for in ten years. Sizing XS (43cm) — riders 5'1" – 5'6" S (47cm) — riders 5'6" – 6'1" M (51cm) — riders 5'9" – 6'2" L (55cm) — riders 6'1" – 6'6" Sizes overlap on purpose. If you fall between two, the smaller size gives a more nimble, upright fit and the larger one stretches you out. Full numbers — reach, stack, standover, and wheelbase for every size — are on our geometry chart . What's included Frame Fork 1-1/8" threadless headset Thru-axles, front and rear (M12, 100mm front / 142mm rear) Universal Derailleur Hanger Cable guides Everything else is yours to choose. The headset, axles, and hanger being included matters more than it sounds — they're the small parts that are easy to forget when you're ordering a build, and the ones that stop the project dead when they don't show up. Specifications Frame: Double-butted 4130 chromoly steel, thru-axle dropouts (12x142mm) Fork: 4130 chromoly steel, thru-axle dropouts (12x100mm) Derailleur hanger: UDH Cable routing: Completely external Headset standard: 1-1/8" threadless Bottom bracket shell: 68mm BSA threaded Seatpost: 27.2mm Brake mount: Flat mount disc Max tire clearance: 650b x 2.4" (60mm) or 700c x 2.25" (57mm) Sizes: XS (43cm), S (47cm), M (51cm), L (55cm) Want it built instead? The complete 4130 All-Road Flat Bar ships ready to ride on 650b wheels with 2.1" Vittoria Barzo tires, a MicroShift 1x10 drivetrain, and hydraulic disc brakes. See the complete bikes ? Want internal routing and a dropper port? The semi-internal routed 4130 All-Road frameset adds dropper post routing, three bottle mounts, and rack and fender mounts. See the semi-internal frameset ? Risk-Free Purchase: Not sure if it's the right fit? We've got you covered with FREE EXCHANGES . If it doesn't work out, we'll send you a return label and swap it for free.* Want to get technical? Full Geo / Specs here .