Lapierre XR 7.9 MTB

bikehouse24:87335 · source URL · confidence 0.29 · GTIN 3660423364959, 3660423364973

Eligibility

Cannot win: confidence 0.29 below 0.75; suspension type not stated, so it is in neither calibration unit

Size decisions

retailer label	alpha	comparable cm	match	mapping	in stock	variant price	evidence
M	M	—	unknown	unsupported	yes	€2.999	—
XL	XL	—	unknown	unsupported	yes	€2.999	—

retailer label

alpha

comparable cm

match

mapping

in stock

variant price

evidence

—

unknown

unsupported

yes

€2.999

—

unknown

unsupported

yes

€2.999

—

mapping	unsupported
reason	Lapierre publishes no defensible conventional equivalence for its letter sizes. Lapierre publishes geometry only. The centimetre figures retailers print beside its letters are its seat-tube lengths: the Xelius DRS geometry row 'A: Seat tube length (mm)' reads XS 440, S 460, M 490, L 520, XL 550, XXL 580, which is exactly the retailers' 'S (46 cm)', 'L (52 cm)', 'XL (55 cm)', 'XXL (58 cm)'. A Lapierre L is a bike for a rider the rest of the market sells a 56-58 to, so reading its 520 mm seat tube as 'conventional 52' would send a 52 cm rider a frame two sizes too big.

mapping

unsupported

reason

Lapierre publishes no defensible conventional equivalence for its letter sizes. Lapierre publishes geometry only. The centimetre figures retailers print beside its letters are its seat-tube lengths: the Xelius DRS geometry row 'A: Seat tube length (mm)' reads XS 440, S 460, M 490, L 520, XL 550, XXL 580, which is exactly the retailers' 'S (46 cm)', 'L (52 cm)', 'XL (55 cm)', 'XXL (58 cm)'. A Lapierre L is a bike for a rider the rest of the market sells a 56-58 to, so reading its 520 mm seat tube as 'conventional 52' would send a 52 cm rider a frame two sizes too big.

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

Identity

Canonical configuration: Lapierre | XR 7.9 Diamant | GX Eagle | 2023
Confidence: high

brand exact (Lapierre)
model normalized to "xr 7.9 diamant"
groupset family exact (GX Eagle)
GTIN match (3660423364959, 3660423364973)
listings state different model years (2022, 2023); the shared manufacturer barcode says they are one SKU and is trusted over the year fields
3 listings across 3 retailers

retailer	price	sizes in stock
BikeHouse24	€2.999	M, XL	debug
bikes.de	€3.399	51 cm (29") - XL	debug
BikeExchange	€3.399	XL	debug

retailer

price

sizes in stock

BikeHouse24

€2.999

M, XL

debug

bikes.de

€3.399

51 cm (29") - XL

debug

BikeExchange

€3.399

debug

Provenance — why we believe each fact

field source evidence

brand retailer:bikehouse24 / parse Lapierre

model retailer:bikehouse24 / derived Lapierre XR 7.9 MTB

category retailer:bikehouse24 / parse MTB

suspension retailer:bikehouse24 / derived no fork or rear-shock row, on a route where neither is the default

availability retailer:bikehouse24 / derived Auf Lager | Lieferzeit 3-7 Werktage innerhalb Dt.

field	source	evidence
brand	`retailer:bikehouse24` / parse	Lapierre
model	`retailer:bikehouse24` / derived	Lapierre XR 7.9 MTB
category	`retailer:bikehouse24` / parse	MTB
suspension	`retailer:bikehouse24` / derived	no fork or rear-shock row, on a route where neither is the default
availability	`retailer:bikehouse24` / derived	Auf Lager \| Lieferzeit 3-7 Werktage innerhalb Dt.

Warnings

high frame-material-unknown — Frame material could not be established.
high groupset-unknown — Groupset could not be established.
info wheel-material-unknown — Wheel material could not be established.
high no-spec-table — Retailer published no structured specification table.

Score breakdown

{
  "frameScore": 8,
  "drivetrainScore": 0,
  "wheelScore": 5,
  "extrasScore": 0,
  "suspensionScore": 0,
  "weightAdjustment": 0,
  "equipmentValue": 13,
  "notes": [
    "Frame material unknown: scored below aluminium rather than assumed.",
    "Groupset not identified: 0 drivetrain points.",
    "Wheels unknown: scored level with basic aluminium, which is neither a reward for omitting the wheelset nor a penalty for naming a cheap one.",
    "Weight not published: no weight adjustment either way.",
    "Fork series not stated: scored at the bottom of the fork ladder rather than assumed."
  ],
  "marketPrice": null,
  "valueScore": null,
  "savingsVsMarket": null
}

AI normalization

Not used: deterministic parsing resolved every field it needed.

Normalized record

{
  "id": "bikehouse24:87335",
  "retailer": "bikehouse24",
  "retailerProductId": "87335",
  "productUrl": "https://www.bikehouse24.de/de/product/lapierre-xr-7-9-mtb-87335/",
  "brand": "Lapierre",
  "model": "XR 7.9 MTB",
  "modelYear": null,
  "category": "mtb",
  "categoryBasis": "stated",
  "sourceCategory": "mtb",
  "price": 2999,
  "originalPrice": 4999,
  "currency": "EUR",
  "discountPercent": 40,
  "frameMaterial": "unknown",
  "frameModel": null,
  "frameTier": null,
  "groupsetBrand": null,
  "groupsetFamily": null,
  "groupsetGeneration": null,
  "electronicShifting": null,
  "speeds": null,
  "mixedGroupset": null,
  "groupsetComponents": null,
  "groupsetTierSpread": 0,
  "crank": null,
  "cassette": null,
  "brakes": "unknown",
  "brakePistons": null,
  "brakeTier": "unknown",
  "suspension": "unknown",
  "fork": null,
  "rearShock": null,
  "dropperPost": null,
  "beltDrive": null,
  "hubDynamo": null,
  "rack": null,
  "mudguards": null,
  "chaincase": null,
  "kickstand": null,
  "lighting": null,
  "wheelSize": null,
  "wheelset": null,
  "wheelMaterial": "unknown",
  "wheelTier": "unknown",
  "tyres": null,
  "weightKg": null,
  "powerMeter": null,
  "powerMeterKind": null,
  "availableSizes": [
    {
      "rawSize": "M",
      "size": "M",
      "sizeCm": null,
      "inStock": true,
      "stockCount": null,
      "price": 2999,
      "preorder": false,
      "deliveryNote": "Auf Lager | Lieferzeit 3-7 Werktage innerhalb Dt."
    },
    {
      "rawSize": "XL",
      "size": "XL",
      "sizeCm": null,
      "inStock": true,
      "stockCount": null,
      "price": 2999,
      "preorder": false,
      "deliveryNote": "Auf Lager | Lieferzeit 3-7 Werktage innerhalb Dt."
    }
  ],
  "seller": null,
  "availability": "in-stock",
  "gtins": [
    "3660423364959",
    "3660423364973"
  ],
  "imageUrl": "https://www.bikehouse24.de/WD_GetRenditeImage.ashx?wd_systemtypeid=704&width=264&height=228&crop=1&valign=CENTER&halign=CENTER&whspace=1&disenlargement=1&thumb=0&wd_pk=WyJhNTk3NjYiXQ%3d%3d",
  "rawTitle": "Lapierre XR 7.9 MTB",
  "fetchedAt": "2026-09-19T06:38:34.742Z",
  "normalizationConfidence": 0.29,
  "warnings": [
    {
      "code": "frame-material-unknown",
      "message": "Frame material could not be established.",
      "severity": "high"
    },
    {
      "code": "groupset-unknown",
      "message": "Groupset could not be established.",
      "severity": "high"
    },
    {
      "code": "wheel-material-unknown",
      "message": "Wheel material could not be established.",
      "severity": "info"
    },
    {
      "code": "no-spec-table",
      "message": "Retailer published no structured specification table.",
      "severity": "high"
    }
  ]
}

Parsed specification table

{}

Raw adapter output

{
  "retailer": "bikehouse24",
  "retailerProductId": "87335",
  "productUrl": "https://www.bikehouse24.de/de/product/lapierre-xr-7-9-mtb-87335/",
  "extractionMethod": "json-ld",
  "sourceCategory": "mtb",
  "rawTitle": "Lapierre XR 7.9 MTB",
  "rawBrand": "Lapierre",
  "price": 2999,
  "originalPrice": 4999,
  "currency": "EUR",
  "imageUrl": "https://www.bikehouse24.de/WD_GetRenditeImage.ashx?wd_systemtypeid=704&width=264&height=228&crop=1&valign=CENTER&halign=CENTER&whspace=1&disenlargement=1&thumb=0&wd_pk=WyJhNTk3NjYiXQ%3d%3d",
  "rawSpecifications": {},
  "rawFeatures": [],
  "rawSizes": [
    {
      "rawSize": "M",
      "size": "M",
      "sizeCm": null,
      "inStock": true,
      "stockCount": null,
      "price": 2999,
      "preorder": false,
      "deliveryNote": "Auf Lager | Lieferzeit 3-7 Werktage innerhalb Dt."
    },
    {
      "rawSize": "XL",
      "size": "XL",
      "sizeCm": null,
      "inStock": true,
      "stockCount": null,
      "price": 2999,
      "preorder": false,
      "deliveryNote": "Auf Lager | Lieferzeit 3-7 Werktage innerhalb Dt."
    }
  ],
  "availabilityText": "Auf Lager | Lieferzeit 3-7 Werktage innerhalb Dt.",
  "fetchedAt": "2026-09-19T06:38:34.742Z",
  "sourceMeta": {
    "ldShape": "ProductGroup",
    "productGroupId": "87335",
    "variantCount": 2,
    "skus": [
      "3660423364959",
      "3660423364973"
    ],
    "varids": [
      "64041",
      "64043"
    ],
    "colours": [
      "purple"
    ],
    "sizesInStock": "2 of 2",
    "badges": [
      "Auf Lager | Lieferzeit 3-7 Werktage innerhalb Dt."
    ]
  }
}

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