{
  "asOf": "2026-09-12",
  "source": {
    "name": "BikeFitDelta geometry model",
    "url": "/methodology/"
  },
  "rows": [
    {
      "slug": "60mm-to-70mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/60mm-to-70mm-stem/",
      "fromLabel": "60mm stem",
      "toLabel": "70mm stem",
      "deltaXmm": 9.8,
      "deltaYmm": 1.9,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 60,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "70mm-to-80mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/70mm-to-80mm-stem/",
      "fromLabel": "70mm stem",
      "toLabel": "80mm stem",
      "deltaXmm": 9.8,
      "deltaYmm": 1.9,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 70,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "80mm-to-90mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/80mm-to-90mm-stem/",
      "fromLabel": "80mm stem",
      "toLabel": "90mm stem",
      "deltaXmm": 9.8,
      "deltaYmm": 1.9,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 80,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "90mm-to-100mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/90mm-to-100mm-stem/",
      "fromLabel": "90mm stem",
      "toLabel": "100mm stem",
      "deltaXmm": 9.8,
      "deltaYmm": 1.9,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 90,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "100mm-to-110mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/100mm-to-110mm-stem/",
      "fromLabel": "100mm stem",
      "toLabel": "110mm stem",
      "deltaXmm": 9.8,
      "deltaYmm": 1.9,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "110mm-to-120mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/110mm-to-120mm-stem/",
      "fromLabel": "110mm stem",
      "toLabel": "120mm stem",
      "deltaXmm": 9.8,
      "deltaYmm": 1.9,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 110,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "120mm-to-130mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/120mm-to-130mm-stem/",
      "fromLabel": "120mm stem",
      "toLabel": "130mm stem",
      "deltaXmm": 9.8,
      "deltaYmm": 1.9,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 120,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "130mm-to-140mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/130mm-to-140mm-stem/",
      "fromLabel": "130mm stem",
      "toLabel": "140mm stem",
      "deltaXmm": 9.8,
      "deltaYmm": 1.9,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 130,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "60mm-to-100mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/60mm-to-100mm-stem/",
      "fromLabel": "60mm stem",
      "toLabel": "100mm stem",
      "deltaXmm": 39.3,
      "deltaYmm": 7.6,
      "clampOffsetMm": 40,
      "matchingStemLengthMm": 60,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "70mm-to-110mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/70mm-to-110mm-stem/",
      "fromLabel": "70mm stem",
      "toLabel": "110mm stem",
      "deltaXmm": 39.3,
      "deltaYmm": 7.6,
      "clampOffsetMm": 40,
      "matchingStemLengthMm": 70,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "80mm-to-120mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/80mm-to-120mm-stem/",
      "fromLabel": "80mm stem",
      "toLabel": "120mm stem",
      "deltaXmm": 39.3,
      "deltaYmm": 7.6,
      "clampOffsetMm": 40,
      "matchingStemLengthMm": 80,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "90mm-to-130mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/90mm-to-130mm-stem/",
      "fromLabel": "90mm stem",
      "toLabel": "130mm stem",
      "deltaXmm": 39.3,
      "deltaYmm": 7.6,
      "clampOffsetMm": 40,
      "matchingStemLengthMm": 90,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "100mm-to-140mm-stem",
      "category": "stem-length",
      "route": "/compare/stem-length/100mm-to-140mm-stem/",
      "fromLabel": "100mm stem",
      "toLabel": "140mm stem",
      "deltaXmm": 39.3,
      "deltaYmm": 7.6,
      "clampOffsetMm": 40,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "-17deg-to--10deg-stem-angle",
      "category": "stem-angle",
      "route": "/compare/stem-angle/-17deg-to--10deg-stem-angle/",
      "fromLabel": "-17° stem angle",
      "toLabel": "-10° stem angle",
      "deltaXmm": -0.7,
      "deltaYmm": 12.2,
      "clampOffsetMm": 12.2,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": -17
    },
    {
      "slug": "-10deg-to--6deg-stem-angle",
      "category": "stem-angle",
      "route": "/compare/stem-angle/-10deg-to--6deg-stem-angle/",
      "fromLabel": "-10° stem angle",
      "toLabel": "-6° stem angle",
      "deltaXmm": -1.1,
      "deltaYmm": 6.9,
      "clampOffsetMm": 7,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": -10
    },
    {
      "slug": "-6deg-to-0deg-stem-angle",
      "category": "stem-angle",
      "route": "/compare/stem-angle/-6deg-to-0deg-stem-angle/",
      "fromLabel": "-6° stem angle",
      "toLabel": "0° stem angle",
      "deltaXmm": -2.5,
      "deltaYmm": 10.2,
      "clampOffsetMm": 10.5,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "0deg-to-6deg-stem-angle",
      "category": "stem-angle",
      "route": "/compare/stem-angle/0deg-to-6deg-stem-angle/",
      "fromLabel": "0° stem angle",
      "toLabel": "6° stem angle",
      "deltaXmm": -3.6,
      "deltaYmm": 9.8,
      "clampOffsetMm": 10.5,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": 0
    },
    {
      "slug": "6deg-to-10deg-stem-angle",
      "category": "stem-angle",
      "route": "/compare/stem-angle/6deg-to-10deg-stem-angle/",
      "fromLabel": "6° stem angle",
      "toLabel": "10° stem angle",
      "deltaXmm": -2.9,
      "deltaYmm": 6.3,
      "clampOffsetMm": 7,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": 6
    },
    {
      "slug": "10deg-to-17deg-stem-angle",
      "category": "stem-angle",
      "route": "/compare/stem-angle/10deg-to-17deg-stem-angle/",
      "fromLabel": "10° stem angle",
      "toLabel": "17° stem angle",
      "deltaXmm": -6.2,
      "deltaYmm": 10.5,
      "clampOffsetMm": 12.2,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": 10
    },
    {
      "slug": "-17deg-to-17deg-stem-angle",
      "category": "stem-angle",
      "route": "/compare/stem-angle/-17deg-to-17deg-stem-angle/",
      "fromLabel": "-17° stem angle",
      "toLabel": "17° stem angle",
      "deltaXmm": -17.1,
      "deltaYmm": 55.9,
      "clampOffsetMm": 58.5,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": -17
    },
    {
      "slug": "-10deg-to-10deg-stem-angle",
      "category": "stem-angle",
      "route": "/compare/stem-angle/-10deg-to-10deg-stem-angle/",
      "fromLabel": "-10° stem angle",
      "toLabel": "10° stem angle",
      "deltaXmm": -10.2,
      "deltaYmm": 33.2,
      "clampOffsetMm": 34.7,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": -10
    },
    {
      "slug": "-6deg-to-6deg-stem-angle",
      "category": "stem-angle",
      "route": "/compare/stem-angle/-6deg-to-6deg-stem-angle/",
      "fromLabel": "-6° stem angle",
      "toLabel": "6° stem angle",
      "deltaXmm": -6.1,
      "deltaYmm": 20,
      "clampOffsetMm": 20.9,
      "matchingStemLengthMm": 100,
      "matchingStemAngleDeg": -6
    },
    {
      "slug": "0mm-to-10mm-steerer-rise",
      "category": "spacer-height",
      "route": "/compare/spacer-height/0mm-to-10mm-steerer-rise/",
      "fromLabel": "0mm total steerer rise",
      "toLabel": "10mm total steerer rise",
      "deltaXmm": -2.9,
      "deltaYmm": 9.6,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 101.5,
      "matchingStemAngleDeg": -11.6
    },
    {
      "slug": "10mm-to-20mm-steerer-rise",
      "category": "spacer-height",
      "route": "/compare/spacer-height/10mm-to-20mm-steerer-rise/",
      "fromLabel": "10mm total steerer rise",
      "toLabel": "20mm total steerer rise",
      "deltaXmm": -2.9,
      "deltaYmm": 9.6,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 101.5,
      "matchingStemAngleDeg": -11.6
    },
    {
      "slug": "20mm-to-30mm-steerer-rise",
      "category": "spacer-height",
      "route": "/compare/spacer-height/20mm-to-30mm-steerer-rise/",
      "fromLabel": "20mm total steerer rise",
      "toLabel": "30mm total steerer rise",
      "deltaXmm": -2.9,
      "deltaYmm": 9.6,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 101.5,
      "matchingStemAngleDeg": -11.6
    },
    {
      "slug": "30mm-to-40mm-steerer-rise",
      "category": "spacer-height",
      "route": "/compare/spacer-height/30mm-to-40mm-steerer-rise/",
      "fromLabel": "30mm total steerer rise",
      "toLabel": "40mm total steerer rise",
      "deltaXmm": -2.9,
      "deltaYmm": 9.6,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 101.5,
      "matchingStemAngleDeg": -11.6
    },
    {
      "slug": "40mm-to-50mm-steerer-rise",
      "category": "spacer-height",
      "route": "/compare/spacer-height/40mm-to-50mm-steerer-rise/",
      "fromLabel": "40mm total steerer rise",
      "toLabel": "50mm total steerer rise",
      "deltaXmm": -2.9,
      "deltaYmm": 9.6,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 101.5,
      "matchingStemAngleDeg": -11.6
    },
    {
      "slug": "50mm-to-60mm-steerer-rise",
      "category": "spacer-height",
      "route": "/compare/spacer-height/50mm-to-60mm-steerer-rise/",
      "fromLabel": "50mm total steerer rise",
      "toLabel": "60mm total steerer rise",
      "deltaXmm": -2.9,
      "deltaYmm": 9.6,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 101.5,
      "matchingStemAngleDeg": -11.6
    },
    {
      "slug": "60mm-to-70mm-steerer-rise",
      "category": "spacer-height",
      "route": "/compare/spacer-height/60mm-to-70mm-steerer-rise/",
      "fromLabel": "60mm total steerer rise",
      "toLabel": "70mm total steerer rise",
      "deltaXmm": -2.9,
      "deltaYmm": 9.6,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 101.5,
      "matchingStemAngleDeg": -11.6
    },
    {
      "slug": "70mm-to-80mm-steerer-rise",
      "category": "spacer-height",
      "route": "/compare/spacer-height/70mm-to-80mm-steerer-rise/",
      "fromLabel": "70mm total steerer rise",
      "toLabel": "80mm total steerer rise",
      "deltaXmm": -2.9,
      "deltaYmm": 9.6,
      "clampOffsetMm": 10,
      "matchingStemLengthMm": 101.5,
      "matchingStemAngleDeg": -11.6
    }
  ]
}