Factor ELARA Gravel Bike

The ELARA is not an update to the OSTRO Gravel. It replaces it. New front triangle, new rear triangle, new fork, new carbon lay-up, and a brief narrower and sharper than anything Factor have previously pointed at a gravel start line. Their industrial designer Mike McGinn put it plainly enough during development: this isn’t just an OSTRO Gravel with bigger tires, it’s a serious redesign. The reasoning is a reading of where the sport went. Courses got faster, equipment specialised, and the front of a gravel field started to look like a road race that had wandered off the tarmac. The OSTRO Gravel balanced speed against versatility. Factor decided that balance was the wrong instinct for the sharp end, and built something that doesn’t attempt it.

The idea at the centre of the bike came from a rider rather than an engineer. Factor’s team initially considered 57 mm tires excessive on a high-speed race bike — until Magnus Bak Klaris, who won the men’s Gravel Earth Series overall in 2025, made the case that at the speeds the front of a race actually holds, a large-volume tire stops being a comfort feature and becomes a speed feature: more traction, better impact management, lower rolling losses over broken ground, far fewer punctures, and a much greater tolerance for choosing the wrong line when fatigue arrives. The engineers went back to the drawing board in October 2025. By February 2026 a prototype was racing, and both Bak Klaris and Romain Bardet reported it was faster. That is the unnamed bike the trade press photographed at Unbound.

Delivering it took a rear triangle unlike anything else in the category. Clearance for a 57 mm tire, room for a 52-tooth chainring, and the option of a 2x drivetrain, all on a short rear-centre, meant a split-plane design with a lowered drive-side stay and an offset seat-tube junction — sculpted to thread between the tire on one side and the chainring and mech on the other. Chainstays hold at 423 mm on a size 56, ranging 420 to 425 across the six sizes, and the frame came out lighter than the OSTRO Gravel’s while measuring stiffer at the bottom bracket and head tube. The geometry goes road-aggressive to match: longer reach, reduced trail, and a lower bottom bracket that puts the rider’s weight back down inside the bike rather than perched on top of a tall axle. The front end draws directly from the ONE and the OSTRO VAM — planar fork integration, a narrow hourglass head tube, and reworked transitions around the down tube and bottle zone, validated in CFD and confirmed in the tunnel.

One thing worth understanding before you choose a build. You get the full 57 mm of clearance with a 1x drivetrain. Fit a 2x and the rear clearance drops to 47 mm. Both are good bikes and Factor deserve credit for keeping 2x on the table at all at this rear-centre, but they are meaningfully different bikes, and which one is right depends on the courses you’re actually racing. It’s the first conversation we’d want to have with you, and it’s the sort of thing that’s much easier to get right before an order than after.

Factor’s premium partner in Arizona and beyond, we’ve been with the brand since the days most US riders couldn’t pronounce “Gitelis,” and we’ve built every model in the range across the years. The ELARA rewards thoughtful choices more than most: the drivetrain and the tire platform that follows from it, the casing and pressure for the surfaces you’ll actually be on, and the fit — because this bike ships with a one-piece cockpit across six sizes and a choice of seatpost offset, and a one-piece cockpit does not let you change your mind cheaply. Settle the position first and let the parts follow it. That’s what Regroup FIT is for, and it’s where a bike that’s technically yours becomes a bike that’s actually yours.

We wrote about the ELARA and what it replaces when it launched, and our Factor gravel bikes buyer’s guide puts it side by side with the Aluto and the Sarana. For the thinking behind the shapes, The Shape of Speed has Factor designers Mike McGinn and Stuart Munro — both quoted above — on how they build a race bike, and our conversation with Factor CEO Rob Gitelis covers why the brand works the way it does.