Geometry ?
Aurum Magma 2026 geometry in sizes 48–58: stack 505–592 mm, reach 371–401 mm, head angle 71.8–73.2°.
| 48 | 51 | 54 | 56 | 58 | |
|---|---|---|---|---|---|
| Stack | 505 mm | 525 mm | 545 mm | 570 mm | 592 mm |
| Reach | 371 mm | 377 mm | 386 mm | 393 mm | 401 mm |
| Head angle | 71.8° | 72° | 73.1° | 73.1° | 73.2° |
| Seat angle | 75° | 74° | 74° | 73.5° | 73.2° |
| Seat tube (?) | 435 mm | 466 mm | 502 mm | 526 mm | 549 mm |
| Head tube | 103 mm | 126 mm | 140 mm | 166 mm | 189 mm |
| BB drop | 74 mm | 71 mm | 71 mm | 71 mm | 71 mm |
| Chainstay | 408 mm | 408 mm | 410 mm | 410 mm | 410 mm |
| Wheelbase | 967 mm | 979 mm | 980 mm | 994 mm | 1008 mm |
| Standover | 721 mm | 751 mm | 780 mm | 804 mm | 826 mm |
| Fork length | 370 mm | 370 mm | 370 mm | 370 mm | 370 mm |
| Fork offset | 50 mm | 50 mm | 44 mm | 44 mm | 44 mm |
(?) by the seat tube length: the manufacturer doesn’t say whether it’s measured centre to centre (c-c) or centre to top (c-t).
Source: aurumbikes.com, checked 12 Nov 2026 · bar position: worked out from published data
Stock build
I don’t have the build for each size yet.
Frames with similar geometry
Stack and reach within 12 mm of size 48 (stack 505 / reach 371 mm).
Stack and reach within 12 mm of size 51 (stack 525 / reach 377 mm).
Stack and reach within 12 mm of size 54 (stack 545 / reach 386 mm).
Stack and reach within 12 mm of size 56 (stack 570 / reach 393 mm).
Stack and reach within 12 mm of size 58 (stack 592 / reach 401 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 7 values for this model’s stem and bars. Add them