What is the crank length in size 56?
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The Factor ALUTO Force XPLR AXS Gravel Bike has a maximum rear tyre clearance of 47 mm and front clearance of 52 mm, allowing it to tackle almost any terrain with confidence. The 27.2 mm round seatpost allows for dropper post compatibility, while the short, low centre-of-gravity geometry ensures road-like responsiveness over long distances. Add the slick shifting 1x13 speed SRAM Force XPLR AXS, complete with power meter, to the mix, and this gravel bike is ready for any adventure.
The ALUTO’s geometry is engineered for dynamic performance across variable terrain. With short chainstays, a steep head tube, a lowered bottom bracket, and a short wheelbase, the ALUTO remains nimble and responsive, even when fitted with wide gravel tyres up to 47 mm. Compared to the OSTRO Gravel, the ALUTO offers a slightly higher stack for a more adaptable fit without compromising a race-ready position. The result is a bike that feels light, bright, and alive – a true “pocketknife” with a razor’s edge for precision handling.
Factor engineers prioritised responsive yet forgiving handling, even on the roughest terrain. The minimal-design fork enhances front-end stiffness while working harmoniously with wide tyres to absorb vibrations and increase grip. The front-end carbon lay-up and tube shapes deliver a light, fatigue-resistant ride over long hours, allowing riders to maintain speed, confidence, and control across tarmac, gravel, and technical trails.
Designed for endurance racing and adventure, the ALUTO features integrated down tube storage for tools, tubes, and essentials, eliminating the need for drag-inducing saddle or bar bags. Its frame is built for electronic drivetrains with hydraulic brakes, full internal cable routing, and a UDH-compatible rear dropout, providing future-proof flexibility. Multiple mounts for bottles and bento boxes make it easy to adapt the bike for race-day minimalism or extended gravel exploration.
| Size | 49 | 52 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|
| A. Stack (mm) | 530 | 547 | 565 | 585 | 605 | 625 |
| B. Reach (mm) | 377 | 385 | 393 | 402 | 412 | 422 |
| C. Head Tube Angle | 71.5 | 71.9 | 72 | 72 | 72 | 73 |
| D. BB Drop (mm) | 80 | 80 | 78 | 78 | 78 | 78 |
| E. Trail (mm) | 64.4 | 61.8 | 61.2 | 61.2 | 61.2 | 61.2 |
| F. Fork Rake/Offset (mm) | 50 | 50 | 50 | 50 | 50 | 50 |
| G. Chainstay Length (mm) | 420 | 420 | 420 | 423 | 425 | 425 |
| H. Wheelbase (mm) | 992.6 | 1002.5 | 1016.5 | 1035 | 1053 | 1070 |
| I. Standover (mm) | 749.5 | 770 | 793 | 812 | 833 | 850.5 |
| J. Seat Tube Length (mm) | 455 | 480 | 505 | 525 | 549 | 565 |
| K. Seat Tube Angle | 74.5 | 74 | 74 | 73.5 | 73.5 | 73.5 |

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