Trek FX Sport SL 4 Matte Onyx Carbon 2025-2026

rabe-bike:79745 · source URL · confidence 0.96

Eligibility

Can win a band.

Size decisions

retailer label	alpha	comparable cm	match	mapping	in stock	variant price	evidence
S	S	—	unknown	unsupported	no	listing price	—
M	M	—	unknown	unsupported	no	listing price	—
L	L	—	unknown	unsupported	no	listing price	—
XL	XL	—	unknown	unsupported	no	listing price	—
XS	XS	—	unknown	unsupported	yes	€1.249	—

retailer label

alpha

comparable cm

match

mapping

in stock

variant price

evidence

—

unknown

unsupported

listing price

—

unknown

unsupported

listing price

—

unknown

unsupported

listing price

—

unknown

unsupported

listing price

—

unknown

unsupported

yes

€1.249

—

mapping	unsupported
reason	Trek publishes no defensible conventional equivalence for its letter sizes. Trek states it 'recently transitioned Trek road bike sizing from numerical sizing to alpha sizing' and now publishes height and inseam only. The centimetre figures retailers print beside Trek letters are per-model seat-tube lengths, not size names: the same 'M' appears as 47.6 cm on a Madone and 50 cm on a Domane, and 'S' also appears as 47.6 cm. The only cm-to-letter statement Trek makes is partial — the Madone Gen 8 FAQ says 'Sizes 52cm and 54cm have been combined into one size (M) and size 62cm has been replaced with a new XL frame' — which accounts for two of eight old sizes and leaves 58 cm and 60 cm unresolved between L and XL. Any complete mapping would have to be invented, so Trek keeps its letters and its retailer-printed centimetres are discarded rather than read as conventional sizes.

mapping

unsupported

reason

Trek publishes no defensible conventional equivalence for its letter sizes. Trek states it 'recently transitioned Trek road bike sizing from numerical sizing to alpha sizing' and now publishes height and inseam only. The centimetre figures retailers print beside Trek letters are per-model seat-tube lengths, not size names: the same 'M' appears as 47.6 cm on a Madone and 50 cm on a Domane, and 'S' also appears as 47.6 cm. The only cm-to-letter statement Trek makes is partial — the Madone Gen 8 FAQ says 'Sizes 52cm and 54cm have been combined into one size (M) and size 62cm has been replaced with a new XL frame' — which accounts for two of eight old sizes and leaves 58 cm and 60 cm unresolved between L and XL. Any complete mapping would have to be invented, so Trek keeps its letters and its retailer-printed centimetres are discarded rather than read as conventional sizes.

A shopper asking for: 54 → nothing compatible · 56 → nothing compatible · 58 → nothing compatible · 60 → nothing compatible

Identity

Canonical configuration: Trek | FX Sport SL 4 Matte Onyx | CUES | 2026
Confidence: high

brand exact (Trek)
model normalized to "fx sport sl 4 matte onyx"
groupset family exact (CUES)
model year exact (2026)
2 listings across 2 retailers

retailer	price	sizes in stock
RABE Bike	€1.249	XS	debug
Liquid-Life	€1.255	none	debug

retailer

price

sizes in stock

RABE Bike

€1.249

debug

Liquid-Life

€1.255

none

debug

Provenance — why we believe each fact

field source evidence

brand retailer:rabe-bike / parse Trek

model retailer:rabe-bike / derived Trek FX Sport SL 4 Matte Onyx Carbon 2025-2026

modelYear retailer:rabe-bike / parse Modelljahr: 2026

category retailer:rabe-bike / derived —

frameMaterial retailer:rabe-bike / parse Carbon

groupsetFamily retailer:rabe-bike / dictionary Shimano CUES U6000 mit optischer Ganganzeige, 10-fach || Shimano CUES U6000 GS

electronicShifting retailer:rabe-bike / derived Shimano CUES U6000 mit optischer Ganganzeige, 10-fach || Shimano CUES U6000 GS

speeds retailer:rabe-bike / parse 10fach

brakes retailer:rabe-bike / dictionary component code MT201

brakeTier retailer:rabe-bike / dictionary MT201

brakePistons retailer:rabe-bike / parse Shimano caliper code MT201

suspension retailer:rabe-bike / derived no suspension fork and no rear shock on a drop-bar listing

fork retailer:rabe-bike / dictionary Carbon, hidden fender mounts, flat mount disc, 5x100mm thru-skew

dropperPost retailer:rabe-bike / derived seatpost row "Bontrager, Aluminium, 27,2 mm, 12 mm Versatz, 330 mm Länge" names no dropper, in a 22-field spec table

wheelMaterial retailer:rabe-bike / dictionary Bontrager Paradigm

wheelTier retailer:rabe-bike / dictionary Bontrager Paradigm

weightKg retailer:rabe-bike / parse Gewicht: 10,5 kg

powerMeter retailer:rabe-bike / derived absent from a 22-field spec table

availability retailer:rabe-bike / derived In Stock; delivery 3-5 days

field	source	evidence
brand	`retailer:rabe-bike` / parse	Trek
model	`retailer:rabe-bike` / derived	Trek FX Sport SL 4 Matte Onyx Carbon 2025-2026
modelYear	`retailer:rabe-bike` / parse	Modelljahr: 2026
category	`retailer:rabe-bike` / derived	—
frameMaterial	`retailer:rabe-bike` / parse	Carbon
groupsetFamily	`retailer:rabe-bike` / dictionary	Shimano CUES U6000 mit optischer Ganganzeige, 10-fach \|\| Shimano CUES U6000 GS
electronicShifting	`retailer:rabe-bike` / derived	Shimano CUES U6000 mit optischer Ganganzeige, 10-fach \|\| Shimano CUES U6000 GS
speeds	`retailer:rabe-bike` / parse	10fach
brakes	`retailer:rabe-bike` / dictionary	component code MT201
brakeTier	`retailer:rabe-bike` / dictionary	MT201
brakePistons	`retailer:rabe-bike` / parse	Shimano caliper code MT201
suspension	`retailer:rabe-bike` / derived	no suspension fork and no rear shock on a drop-bar listing
fork	`retailer:rabe-bike` / dictionary	Carbon, hidden fender mounts, flat mount disc, 5x100mm thru-skew
dropperPost	`retailer:rabe-bike` / derived	seatpost row "Bontrager, Aluminium, 27,2 mm, 12 mm Versatz, 330 mm Länge" names no dropper, in a 22-field spec table
wheelMaterial	`retailer:rabe-bike` / dictionary	Bontrager Paradigm
wheelTier	`retailer:rabe-bike` / dictionary	Bontrager Paradigm
weightKg	`retailer:rabe-bike` / parse	Gewicht: 10,5 kg
powerMeter	`retailer:rabe-bike` / derived	absent from a 22-field spec table
availability	`retailer:rabe-bike` / derived	In Stock; delivery 3-5 days

Warnings

info single-size-only — Only one size is in stock (XS).

Score breakdown

{
  "frameScore": 21,
  "drivetrainScore": 13,
  "wheelScore": 8,
  "extrasScore": 3,
  "suspensionScore": 0,
  "weightAdjustment": 4,
  "equipmentValue": 49,
  "notes": [
    "Shimano CUES = 15.",
    "10-speed -2.",
    "Wheels \"good-aluminium\" = 8.",
    "Brakes \"hydraulic-disc\" +3.",
    "10.5 kg vs 16.2 kg city reference = +4."
  ],
  "marketPrice": 1744,
  "valueScore": 1.396,
  "savingsVsMarket": 495
}

AI normalization

Not used: deterministic parsing resolved every field it needed.

Normalized record

{
  "id": "rabe-bike:79745",
  "retailer": "rabe-bike",
  "retailerProductId": "79745",
  "productUrl": "https://www.rabe-bike.de/en/trek-fx-sport-4-matte-onyx-carbon-2025",
  "brand": "Trek",
  "model": "FX Sport SL 4 Matte Onyx Carbon -",
  "modelYear": 2026,
  "category": "city",
  "categoryBasis": "route",
  "sourceCategory": "city",
  "price": 1249,
  "originalPrice": 1499,
  "currency": "EUR",
  "discountPercent": 17,
  "frameMaterial": "carbon",
  "frameModel": "400 Series OCLV Carbon, interne Zugführung, 3S-Kettenführung, DuoTrap S-kompatibel, Schutzblechösen, Flat Mount-Scheibenbremsaufnahme, 135 x 5 mm ThruSkew",
  "frameTier": null,
  "groupsetBrand": "Shimano",
  "groupsetFamily": "CUES",
  "groupsetGeneration": null,
  "electronicShifting": false,
  "speeds": 10,
  "mixedGroupset": false,
  "groupsetComponents": {
    "shifters": "CUES",
    "rearDerailleur": "CUES",
    "cassette": "CUES"
  },
  "groupsetTierSpread": 0,
  "crank": "Prowheel, Aluminium, Narrow-Wide-Kettenblatt (42 Z.), 175 mm Kurbelarmlänge",
  "cassette": "Shimano CUES LG300, LINKGLIDE, 11-48 Z., 10fach",
  "brakes": "hydraulic-disc",
  "brakePistons": 2,
  "brakeTier": "basic",
  "suspension": "none",
  "fork": {
    "make": null,
    "line": null,
    "tier": "rigid",
    "travelMm": 0
  },
  "rearShock": null,
  "dropperPost": false,
  "beltDrive": null,
  "hubDynamo": null,
  "rack": null,
  "mudguards": null,
  "chaincase": null,
  "kickstand": null,
  "lighting": null,
  "wheelSize": null,
  "wheelset": "Bontrager Paradigm, Tubeless Ready, 32-Loch, 21 mm Innenweite, Presta-Ventil | Formula CL-51, Aluminium, 100 x 5 mm Schnellspannachse | Form",
  "wheelMaterial": "aluminium",
  "wheelTier": "good-aluminium",
  "tyres": "Bontrager GR1 Expert, Hard-Case Lite, Drahtwulstkern, 60 TPI, 700 x 40 mm",
  "weightKg": 10.5,
  "powerMeter": false,
  "powerMeterKind": null,
  "availableSizes": [
    {
      "rawSize": "S",
      "size": "S",
      "sizeCm": null,
      "inStock": false,
      "stockCount": 0,
      "price": null
    },
    {
      "rawSize": "M",
      "size": "M",
      "sizeCm": null,
      "inStock": false,
      "stockCount": 0,
      "price": null
    },
    {
      "rawSize": "L",
      "size": "L",
      "sizeCm": null,
      "inStock": false,
      "stockCount": 0,
      "price": null
    },
    {
      "rawSize": "XL",
      "size": "XL",
      "sizeCm": null,
      "inStock": false,
      "stockCount": 0,
      "price": null
    },
    {
      "rawSize": "XS",
      "size": "XS",
      "sizeCm": null,
      "inStock": true,
      "stockCount": 1,
      "price": 1249
    }
  ],
  "seller": null,
  "availability": "limited",
  "gtins": [],
  "imageUrl": "https://www.rabe-bike.de/img/450/300/resize/catalog/product/t/r/trek_fx_sport_4_matte_onyx_carbon_2025-12_5.jpg",
  "rawTitle": "Trek FX Sport SL 4 Matte Onyx Carbon 2025-2026",
  "fetchedAt": "2026-09-19T06:24:17.598Z",
  "normalizationConfidence": 0.96,
  "warnings": [
    {
      "code": "single-size-only",
      "message": "Only one size is in stock (XS).",
      "severity": "info"
    }
  ]
}

Parsed specification table

{
  "Rahmen": "400 Series OCLV Carbon, interne Zugführung, 3S-Kettenführung, DuoTrap S-kompatibel, Schutzblechösen, Flat Mount-Scheibenbremsaufnahme, 135 x 5 mm ThruSkew",
  "Gabel": "Carbon, hidden fender mounts, flat mount disc, 5x100mm thru-skew",
  "Schaltwerk": "Shimano CUES U6000 GS",
  "Schalthebel": "Shimano CUES U6000 mit optischer Ganganzeige, 10-fach",
  "Bremshebel": "Shimano MT201",
  "Kurbel": "Prowheel, Aluminium, Narrow-Wide-Kettenblatt (42 Z.), 175 mm Kurbelarmlänge",
  "Kassette": "Shimano CUES LG300, LINKGLIDE, 11-48 Z., 10fach",
  "Kette": "Shimano LG500",
  "Bremsen": "Shimano RT10, Center Lock-Scheibenaufnahme, 160 mm",
  "Felgen": "Bontrager Paradigm, Tubeless Ready, 32-Loch, 21 mm Innenweite, Presta-Ventil",
  "Nabe vorn": "Formula CL-51, Aluminium, 100 x 5 mm Schnellspannachse",
  "Nabe hinten": "Formula CL-52, Aluminium, 135 x 5 mm Schnellspannachse",
  "Reifen": "Bontrager GR1 Expert, Hard-Case Lite, Drahtwulstkern, 60 TPI, 700 x 40 mm",
  "Sattel": "Bontrager H1",
  "Sattelstütze": "Bontrager, Aluminium, 27,2 mm, 12 mm Versatz, 330 mm Länge",
  "Lenker": "Bontrager Satellite Plus IsoZone, Aluminium, 31,8 mm, 15 mm Rise",
  "Griffe": "Bontrager Satellite Plus IsoZone, Schraubklemmung, ergonomisch",
  "Gewicht": "10,5 kg",
  "Systemgewicht": "136 kg",
  "Modelljahr": "2026",
  "Rahmenmaterial": "Carbon",
  "Bremsenhersteller": "Shimano"
}

Raw adapter output

{
  "retailer": "rabe-bike",
  "retailerProductId": "79745",
  "productUrl": "https://www.rabe-bike.de/en/trek-fx-sport-4-matte-onyx-carbon-2025",
  "extractionMethod": "server-html",
  "sourceCategory": "city",
  "rawTitle": "Trek FX Sport SL 4 Matte Onyx Carbon 2025-2026",
  "rawBrand": "Trek",
  "price": 1249,
  "originalPrice": 1499,
  "currency": "EUR",
  "imageUrl": "https://www.rabe-bike.de/img/450/300/resize/catalog/product/t/r/trek_fx_sport_4_matte_onyx_carbon_2025-12_5.jpg",
  "rawSpecifications": {
    "Rahmen": "400 Series OCLV Carbon, interne Zugführung, 3S-Kettenführung, DuoTrap S-kompatibel, Schutzblechösen, Flat Mount-Scheibenbremsaufnahme, 135 x 5 mm ThruSkew",
    "Gabel": "Carbon, hidden fender mounts, flat mount disc, 5x100mm thru-skew",
    "Schaltwerk": "Shimano CUES U6000 GS",
    "Schalthebel": "Shimano CUES U6000 mit optischer Ganganzeige, 10-fach",
    "Bremshebel": "Shimano MT201",
    "Kurbel": "Prowheel, Aluminium, Narrow-Wide-Kettenblatt (42 Z.), 175 mm Kurbelarmlänge",
    "Kassette": "Shimano CUES LG300, LINKGLIDE, 11-48 Z., 10fach",
    "Kette": "Shimano LG500",
    "Bremsen": "Shimano RT10, Center Lock-Scheibenaufnahme, 160 mm",
    "Felgen": "Bontrager Paradigm, Tubeless Ready, 32-Loch, 21 mm Innenweite, Presta-Ventil",
    "Nabe vorn": "Formula CL-51, Aluminium, 100 x 5 mm Schnellspannachse",
    "Nabe hinten": "Formula CL-52, Aluminium, 135 x 5 mm Schnellspannachse",
    "Reifen": "Bontrager GR1 Expert, Hard-Case Lite, Drahtwulstkern, 60 TPI, 700 x 40 mm",
    "Sattel": "Bontrager H1",
    "Sattelstütze": "Bontrager, Aluminium, 27,2 mm, 12 mm Versatz, 330 mm Länge",
    "Lenker": "Bontrager Satellite Plus IsoZone, Aluminium, 31,8 mm, 15 mm Rise",
    "Griffe": "Bontrager Satellite Plus IsoZone, Schraubklemmung, ergonomisch",
    "Gewicht": "10,5 kg",
    "Systemgewicht": "136 kg",
    "Modelljahr": "2026",
    "Rahmenmaterial": "Carbon",
    "Bremsenhersteller": "Shimano"
  },
  "rawFeatures": [
    "Fast, powerful and comfortable. The vibration-damping carbon frame of the FX Sport 4 is equipped with high-quality parts that you will enjoy for a long time - including a 1x drive with intuitive operation."
  ],
  "rawSizes": [
    {
      "rawSize": "S",
      "size": "S",
      "sizeCm": null,
      "inStock": false,
      "stockCount": 0,
      "price": null
    },
    {
      "rawSize": "M",
      "size": "M",
      "sizeCm": null,
      "inStock": false,
      "stockCount": 0,
      "price": null
    },
    {
      "rawSize": "L",
      "size": "L",
      "sizeCm": null,
      "inStock": false,
      "stockCount": 0,
      "price": null
    },
    {
      "rawSize": "XL",
      "size": "XL",
      "sizeCm": null,
      "inStock": false,
      "stockCount": 0,
      "price": null
    },
    {
      "rawSize": "XS",
      "size": "XS",
      "sizeCm": null,
      "inStock": true,
      "stockCount": 1,
      "price": 1249
    }
  ],
  "availabilityText": "In Stock; delivery 3-5 days",
  "fetchedAt": "2026-09-19T06:24:17.598Z",
  "sourceMeta": {
    "sku": "79745",
    "listingPath": "/en/trekking/urban",
    "soldOut": 1,
    "netFinalPrice": 1049.5798319327732,
    "inStockSizesOnListing": [
      "XS"
    ],
    "childCount": 5
  }
}

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