Lab
Same physics, same numbers. Now in the browser.
The web engine is a faithful port of the reference spreadsheet calculator. Every time this page loads, the server runs the reference cases again and compares them with the values stored in the spreadsheet.
13/13
values identical to the spreadsheet
15
significant digits in common, at least
0.5 ms
to run both cases on the server
Recommendation
110 kg rider, Soft, 24 kg bike, 64° head angle, Fox 38 2021 with 16 ml negative volume, 170 mm, recommended SAG.
| Quantity | Spreadsheet | Web engine | Match |
|---|---|---|---|
| Work targetC20 | 122.964613044 J | 122.964613044 J | exact |
| Force at SAGC22 | 457.877584866891 N | 457.877584866891 N | 15 digits |
| Recommended pressureC17 | 106.676789024564 psi | 106.676789024564 psi | 15 digits |
| Volume spacersC18 | 0 ml | 0 ml | exact |
| Calculated SAGD24 | 44.2000000000004 mm | 44.2000000000004 mm | exact |
| Initial travelC25 | 6.46704416365648 mm | 6.46704416365648 mm | 15 digits |
| Support rigidityC27 | 7.99606364316513 N/mm | 7.99606364316513 N/mm | 15 digits |
| Bottom-out forceC28 | 1959.69756172018 N | 1959.69756172018 N | exact |
Existing setup
105 kg rider on a Fox 38 2021 at 116 psi without spacers: what SAG, support and feel does it give?
| Quantity | Spreadsheet | Web engine | Match |
|---|---|---|---|
| Force at SAGE22 | 441.595051923299 N | 441.595051923299 N | 15 digits |
| Calculated SAGE24 | 47.2000000000004 mm | 47.2000000000004 mm | exact |
| Energy over travelE20 | 133.470767021028 J | 133.470767021028 J | exact |
| Support rigidityE27 | 8.28142763526658 N/mm | 8.28142763526658 N/mm | 15 digits |
| Bottom-out forceE28 | 1800.44855118155 N | 1800.44855118155 N | exact |
Where the very last digit differs, it comes from how each runtime computes a sine, around the 16th significant digit. That is far below what any pump or gauge can read.