Geometry ?
FiftyOne Sika 2026 geometry in sizes XS–XXL: stack 515–628 mm, reach 360–410 mm, head angle 70.8–72.8°.
| XS | S | M | L | XL | XXL | |
|---|---|---|---|---|---|---|
| Stack | 515 mm | 537 mm | 555 mm | 578 mm | 603 mm | 628 mm |
| Reach | 360 mm | 370 mm | 380 mm | 390 mm | 400 mm | 410 mm |
| Head angle | 70.8° | 71° | 71.2° | 72.6° | 72.8° | 72.8° |
| Seat angle | 74° | 74° | 73.5° | 73.5° | 73° | 73° |
| Seat tube (?) | 470 mm | 490 mm | 510 mm | 530 mm | 550 mm | 570 mm |
| Head tube | 93.2 mm | 115.7 mm | 134 mm | 150 mm | 175.5 mm | 201.6 mm |
| BB drop | 78 mm | 78 mm | 78 mm | 78 mm | 78 mm | 78 mm |
| Chainstay | 418 mm | 418 mm | 420 mm | 420 mm | 422 mm | 422 mm |
| Wheelbase | 982 mm | 998 mm | 1014 mm | 1010 mm | 1027 mm | 1045 mm |
| Standover | 743 mm | 763.2 mm | 782.2 mm | 803.2 mm | 824.8 mm | 846.4 mm |
| Fork length | 388 mm | 388 mm | 388 mm | 388 mm | 388 mm | 388 mm |
| Fork offset | 56 mm | 56 mm | 56 mm | 48 mm | 48 mm | 48 mm |
| Stock build by size | ||||||
| Stem | 80 mm | 90 mm | 100 mm | 100 mm | 110 mm | 110 mm |
| Bar width | 380 mm | 400 mm | 420 mm | 420 mm | 420 mm | 440 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: fiftyonebikes.com, checked 12 Nov 2026 · bar position: worked out from published data
Stock build
Frames with similar geometry
Stack and reach within 12 mm of size XS (stack 515 / reach 360 mm).
Stack and reach within 12 mm of size S (stack 537 / reach 370 mm).
Stack and reach within 12 mm of size M (stack 555 / reach 380 mm).
Stack and reach within 12 mm of size L (stack 578 / reach 390 mm).
Stack and reach within 12 mm of size XL (stack 603 / reach 400 mm).
Stack and reach within 12 mm of size XXL (stack 628 / reach 410 mm).
Spotted a mistake or a missing build? Let me know.
Are you the manufacturer, or do you sell this bike? I’m missing 2 values for this model’s stem and bars. Add them