i:SY S8 ZR RT Belt 545 Kompaktrad 20" schwarz

zweirad-stadler:i-sy-s8-zr-rt-belt-545-kompaktrad-20-schwarz · source URL · confidence 0.83

Eligibility

Cannot win: e-bike bikes are not value-ranked yet (no e-bike-specific equipment model)

Size decisions

retailer label	alpha	comparable cm	match	mapping	in stock	variant price	evidence
47 cm (Onesize)	—	—	unknown	unsupported	yes	listing price	—

retailer label

alpha

comparable cm

match

mapping

in stock

variant price

evidence

47 cm (Onesize)

—

unknown

unsupported

yes

listing price

—

mapping	unsupported
reason	"47 cm (Onesize)" could not be read as a frame size.

mapping

unsupported

reason

"47 cm (Onesize)" could not be read as a frame size.

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

Identity

Canonical configuration: I:sy | S8 ZR RT Belt 545 Kompaktrad 20" | Nexus
Confidence: medium

brand exact (I:sy)
model normalized to "s8 zr rt belt 545 kompaktrad 20"
groupset family exact (Nexus)
model year unavailable on every listing
2 listings across 1 retailer
downgraded to medium: no shared GTIN, and no listing states a model year

retailer	price	sizes in stock
Zweirad Stadler	€3.899	47 cm (Onesize)	debug
Zweirad Stadler	€3.899	47 cm (Onesize)	debug

retailer

price

sizes in stock

Zweirad Stadler

€3.899

47 cm (Onesize)

debug

Zweirad Stadler

€3.899

47 cm (Onesize)

debug

Provenance — why we believe each fact

field source evidence

brand retailer:zweirad-stadler / parse i:SY

model retailer:zweirad-stadler / derived i:SY S8 ZR RT Belt 545 Kompaktrad 20" schwarz

category retailer:zweirad-stadler / derived retailer taxonomy

frameMaterial retailer:zweirad-stadler / parse Aluminium

groupsetFamily retailer:zweirad-stadler / dictionary Shimano Nexus Revoshifter || Shimano Nexus

electronicShifting retailer:zweirad-stadler / derived Shimano Nexus Revoshifter || Shimano Nexus

speeds retailer:zweirad-stadler / parse 8-Gang

brakes retailer:zweirad-stadler / parse Hydraulische Scheibenbremsen

brakePistons retailer:zweirad-stadler / parse 2-Kolben

suspension retailer:zweirad-stadler / derived Starrgabel

fork retailer:zweirad-stadler / dictionary Starrgabel

dropperPost retailer:zweirad-stadler / derived seatpost row "By.Schulz G.2 ST" names no dropper, in a 48-field spec table

rack retailer:zweirad-stadler / parse i:SY Carrier 2.0 Monkey Load Ready

mudguards retailer:zweirad-stadler / parse SKS Bluemels 20 Zoll, Breite 65 mm

kickstand retailer:zweirad-stadler / parse Pletscher Kickstand Comp40 Flex

lighting retailer:zweirad-stadler / parse FUXON FF-100EB, 100 Lux LED mit Fernlicht

wheelSize retailer:zweirad-stadler / parse 20

weightKg retailer:zweirad-stadler / parse Gewicht: ca. 24,7 kg

powerMeter retailer:zweirad-stadler / derived absent from a 48-field spec table

availability retailer:zweirad-stadler / derived 1 of 1 sizes orderable

ebike.motor retailer:zweirad-stadler / parse Bosch | Bosch Active Line Plus

ebike.motor.position retailer:zweirad-stadler / parse Mittelmotor

ebike.motor.torqueNm retailer:zweirad-stadler / parse 60 Nm

ebike.speedClass retailer:zweirad-stadler / parse Unterstützung: bis 25 km/h

ebike.eDiscipline retailer:zweirad-stadler / parse shelf: E-Kompaktrad

ebike.display retailer:zweirad-stadler / parse Display: Bosch Intuvia 100

ebike.maxSystemWeightKg retailer:zweirad-stadler / parse zul. Gesamtgewicht: max. 150 kg

ebike.battery.capacityWh ai / ai (1) Kapazität: 545 Wh

field	source	evidence
brand	`retailer:zweirad-stadler` / parse	i:SY
model	`retailer:zweirad-stadler` / derived	i:SY S8 ZR RT Belt 545 Kompaktrad 20" schwarz
category	`retailer:zweirad-stadler` / derived	retailer taxonomy
frameMaterial	`retailer:zweirad-stadler` / parse	Aluminium
groupsetFamily	`retailer:zweirad-stadler` / dictionary	Shimano Nexus Revoshifter \|\| Shimano Nexus
electronicShifting	`retailer:zweirad-stadler` / derived	Shimano Nexus Revoshifter \|\| Shimano Nexus
speeds	`retailer:zweirad-stadler` / parse	8-Gang
brakes	`retailer:zweirad-stadler` / parse	Hydraulische Scheibenbremsen
brakePistons	`retailer:zweirad-stadler` / parse	2-Kolben
suspension	`retailer:zweirad-stadler` / derived	Starrgabel
fork	`retailer:zweirad-stadler` / dictionary	Starrgabel
dropperPost	`retailer:zweirad-stadler` / derived	seatpost row "By.Schulz G.2 ST" names no dropper, in a 48-field spec table
rack	`retailer:zweirad-stadler` / parse	i:SY Carrier 2.0 Monkey Load Ready
mudguards	`retailer:zweirad-stadler` / parse	SKS Bluemels 20 Zoll, Breite 65 mm
kickstand	`retailer:zweirad-stadler` / parse	Pletscher Kickstand Comp40 Flex
lighting	`retailer:zweirad-stadler` / parse	FUXON FF-100EB, 100 Lux LED mit Fernlicht
wheelSize	`retailer:zweirad-stadler` / parse	20
weightKg	`retailer:zweirad-stadler` / parse	Gewicht: ca. 24,7 kg
powerMeter	`retailer:zweirad-stadler` / derived	absent from a 48-field spec table
availability	`retailer:zweirad-stadler` / derived	1 of 1 sizes orderable
ebike.motor	`retailer:zweirad-stadler` / parse	Bosch \| Bosch Active Line Plus
ebike.motor.position	`retailer:zweirad-stadler` / parse	Mittelmotor
ebike.motor.torqueNm	`retailer:zweirad-stadler` / parse	60 Nm
ebike.speedClass	`retailer:zweirad-stadler` / parse	Unterstützung: bis 25 km/h
ebike.eDiscipline	`retailer:zweirad-stadler` / parse	shelf: E-Kompaktrad
ebike.display	`retailer:zweirad-stadler` / parse	Display: Bosch Intuvia 100
ebike.maxSystemWeightKg	`retailer:zweirad-stadler` / parse	zul. Gesamtgewicht: max. 150 kg
ebike.battery.capacityWh	`ai` / ai (1)	Kapazität: 545 Wh

Warnings

info single-size-only — Only one size is in stock (47 cm (Onesize)).
info wheel-material-unknown — Wheel material could not be established.

Score breakdown

{
  "frameScore": 11,
  "drivetrainScore": 0,
  "wheelScore": 5,
  "extrasScore": 0,
  "suspensionScore": 2,
  "weightAdjustment": -3,
  "equipmentValue": 15,
  "notes": [
    "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.",
    "Brakes \"hydraulic-disc\" = 0, the baseline for mtb-hardtail.",
    "24.7 kg vs 14.4 kg mtb-hardtail reference = -3.",
    "Fork \"rigid\" +2 (0 mm travel, which is not scored)."
  ],
  "marketPrice": null,
  "valueScore": null,
  "savingsVsMarket": null
}

AI normalization

{
  "requested": [
    "wheelMaterial",
    "wheelTier"
  ],
  "applied": [],
  "rejected": [],
  "notes": "Wheel material cannot be established from the source. The named rim model is Ryde Andra40, but no material is stated and no defensible wheel-tier classification is available.",
  "raw": {
    "frameMaterial": {
      "value": "aluminium",
      "evidence": "Material: Aluminium",
      "confidence": 1
    },
    "groupsetBrand": {
      "value": "Shimano",
      "evidence": "Schaltwerk: Shimano Nexus",
      "confidence": 1
    },
    "groupsetFamily": {
      "value": "Nexus",
      "evidence": "8-Gang Shimano Nexus Nabenschaltung",
      "confidence": 1
    },
    "electronicShifting": {
      "value": "false",
      "evidence": "Schalthebel: Shimano Nexus Revoshifter",
      "confidence": 0.99
    },
    "speeds": {
      "value": "8",
      "evidence": "Gänge: 8-Gang",
      "confidence": 1
    },
    "mixedGroupset": {
      "value": "false",
      "evidence": "8-Gang Shimano Nexus Nabenschaltung mit Gates CDX Zahnriemen-Antrieb",
      "confidence": 0.95
    },
    "wheelMaterial": {
      "value": null,
      "evidence": null,
      "confidence": 0
    },
    "wheelTier": {
      "value": null,
      "evidence": null,
      "confidence": 0
    },
    "brakes": {
      "value": "hydraulic-disc",
      "evidence": "Bremsenart: Hydraulische Scheibenbremsen",
      "confidence": 1
    },
    "weightKg": {
      "value": "24.7",
      "evidence": "Gewicht: ca. 24,7 kg",
      "confidence": 1
    },
    "powerMeter": {
      "value": null,
      "evidence": null,
      "confidence": 0
    },
    "notes": "Wheel material cannot be established from the source. The named rim model is Ryde Andra40, but no material is stated and no defensible wheel-tier classification is available."
  }
}

Normalized record

{
  "id": "zweirad-stadler:i-sy-s8-zr-rt-belt-545-kompaktrad-20-schwarz",
  "retailer": "zweirad-stadler",
  "retailerProductId": "i-sy-s8-zr-rt-belt-545-kompaktrad-20-schwarz",
  "productUrl": "https://shop.zweirad-stadler.de/fahrrad-shop/e-bikes/e-kompaktrad/i-sy-s8-zr-rt-belt-545-kompaktrad-20-schwarz.html",
  "brand": "I:sy",
  "model": "S8 ZR RT Belt 545 Kompaktrad 20\" schwarz",
  "modelYear": null,
  "category": "e-bike",
  "categoryBasis": "route",
  "sourceCategory": "e-bike",
  "price": 3899,
  "originalPrice": null,
  "currency": "EUR",
  "discountPercent": null,
  "frameMaterial": "aluminium",
  "frameModel": null,
  "frameTier": null,
  "groupsetBrand": "Shimano",
  "groupsetFamily": "Nexus",
  "groupsetGeneration": null,
  "electronicShifting": false,
  "speeds": 8,
  "mixedGroupset": false,
  "groupsetComponents": {
    "shifters": "Nexus",
    "rearDerailleur": "Nexus"
  },
  "groupsetTierSpread": 0,
  "crank": "i:SY E-Bike Kurbel",
  "cassette": "63/22T",
  "brakes": "hydraulic-disc",
  "brakePistons": 2,
  "brakeTier": "unknown",
  "suspension": "none",
  "fork": {
    "make": null,
    "line": null,
    "tier": "rigid",
    "travelMm": 0
  },
  "rearShock": null,
  "dropperPost": false,
  "beltDrive": null,
  "hubDynamo": null,
  "rack": true,
  "mudguards": true,
  "chaincase": null,
  "kickstand": true,
  "lighting": true,
  "wheelSize": "other",
  "wheelset": "Ryde Andra40 20\" | Shimano Deore HB-M5100, Centerlock | Shimano SG-C6001-8D",
  "wheelMaterial": "unknown",
  "wheelTier": "unknown",
  "tyres": "Schwalbe Pick Up, Super Defense, 60-406",
  "weightKg": 24.7,
  "ebike": {
    "motor": {
      "text": "Bosch | Bosch Active Line Plus",
      "brand": "bosch",
      "model": null,
      "position": "mid",
      "torqueNm": 60,
      "torqueSource": "retailer",
      "ratedPowerW": null,
      "peakPowerW": null
    },
    "battery": {
      "text": null,
      "capacityWh": 545,
      "count": null,
      "integration": "unknown",
      "removable": null
    },
    "speedClass": "pedelec-25",
    "rangeExtender": "unknown",
    "display": "Bosch Intuvia 100",
    "abs": null,
    "autoShift": null,
    "statedRangeKm": null,
    "eDiscipline": "e-compact",
    "eDisciplineBasis": "leaf",
    "frameShape": "unknown",
    "cargoType": "unknown",
    "maxSystemWeightKg": 150,
    "rackCapacityKg": null,
    "weightIncludesBattery": null
  },
  "powerMeter": false,
  "powerMeterKind": null,
  "availableSizes": [
    {
      "rawSize": "47 cm (Onesize)",
      "size": "47",
      "sizeCm": 47,
      "inStock": true,
      "stockCount": null,
      "price": null,
      "deliveryNote": "4-8 Werktage"
    }
  ],
  "seller": null,
  "availability": "limited",
  "gtins": [],
  "imageUrl": "https://shop.zweirad-stadler.de/out/pictures/generated/product/1/1500_1500_100/isy-s8-zr-rt-belt-545-schwarz-kompaktrad-20-134800-a.jpg",
  "rawTitle": "i:SY S8 ZR RT Belt 545 Kompaktrad 20\" schwarz",
  "fetchedAt": "2026-09-26T08:25:18.754Z",
  "normalizationConfidence": 0.83,
  "warnings": [
    {
      "code": "single-size-only",
      "message": "Only one size is in stock (47 cm (Onesize)).",
      "severity": "info"
    },
    {
      "code": "wheel-material-unknown",
      "message": "Wheel material could not be established.",
      "severity": "info"
    }
  ],
  "ebikeAi": {
    "requested": [
      "motorModel",
      "batteryWh",
      "batteryIntegration",
      "frameShape"
    ],
    "applied": [
      "batteryWh"
    ],
    "rejected": [],
    "notes": "The source names Bosch Active Line Plus but does not establish the exact motor unit variant. Battery integration is not stated. The frame is described as \"Kompakt\", which does not deterministically map to diamond, trapeze, or step-through.",
    "raw": {
      "motorBrand": {
        "value": "bosch",
        "evidence": "Motorhersteller: Bosch",
        "confidence": 1
      },
      "motorModel": {
        "value": null,
        "evidence": null,
        "confidence": 1
      },
      "batteryWh": {
        "value": "545",
        "evidence": "Kapazität: 545 Wh",
        "confidence": 1
      },
      "speedClass": {
        "value": "pedelec-25",
        "evidence": "Unterstützung: bis 25 km/h",
        "confidence": 1
      },
      "batteryIntegration": {
        "value": null,
        "evidence": null,
        "confidence": 1
      },
      "frameShape": {
        "value": null,
        "evidence": null,
        "confidence": 1
      },
      "notes": "The source names Bosch Active Line Plus but does not establish the exact motor unit variant. Battery integration is not stated. The frame is described as \"Kompakt\", which does not deterministically map to diamond, trapeze, or step-through."
    }
  }
}

Parsed specification table

{
  "Material": "Aluminium",
  "Farbe": "schwarz",
  "Gabel": "Original I:SY Starrgabel",
  "Steuersatz": "i:SY Steuersatz",
  "Schaltung": "Nabenschaltung",
  "Gänge": "8-Gang",
  "Schaltwerk": "Shimano Nexus",
  "Schalthebel": "Shimano Nexus Revoshifter",
  "Bremsenart": "Hydraulische Scheibenbremsen",
  "Bremshebel": "3-Finger Bremshebel",
  "Bremsscheiben": "180 mm/ 180 mm",
  "Rücktrittbremse": "Ja",
  "Kurbel": "i:SY E-Bike Kurbel",
  "Pedale": "i:SY Antirutsch Faltpedal",
  "Kassette": "63/22T",
  "Lenker": "i:SY Lenker 30°",
  "Griffe": "ERGON GC10 ERGONomische Griffe",
  "Vorbau": "i:SY Vorbau 70 mm",
  "Sattelstütze": "By.Schulz G.2 ST",
  "Sattel": "ZECURE Hydro Foam, Gr. M",
  "Laufradgröße": "20\"",
  "Felgen": "Ryde Andra40 20\"",
  "Speichen": "32xNiro 2,0 mm",
  "Reifen": "Schwalbe Pick Up, Super Defense, 60-406",
  "Nabe vorne": "Shimano Deore HB-M5100, Centerlock",
  "Nabe hinten": "Shimano SG-C6001-8D",
  "Motorart": "Mittelmotor",
  "Motorhersteller": "Bosch",
  "Motor": "Bosch Active Line Plus",
  "Max. Drehmoment": "60 Nm",
  "Unterstützung": "bis 25 km/h",
  "Kapazität": "545 Wh",
  "Ladegerät": "Bosch 4A Charger",
  "Display": "Bosch Intuvia 100",
  "Scheinwerfer": "FUXON FF-100EB, 100 Lux LED mit Fernlicht",
  "Rücklicht": "FUXON R-Glow S LED Rücklicht",
  "Gepäckträger": "i:SY Carrier 2.0 Monkey Load Ready",
  "Schutzbleche": "SKS Bluemels 20 Zoll, Breite 65 mm",
  "Gewicht": "ca. 24,7 kg",
  "zul. Gesamtgewicht": "max. 150 kg",
  "Rahmenform": "Kompakt",
  "Herstellerfarbe": "pepper black",
  "Bremsen vorne": "Tektro HD-T280, hydraulische 2-Kolben Scheibenbremse",
  "Bremsen hinten": "Tektro HD-T280, hydraulische 2-Kolben Scheibenbremse",
  "Riemenantrieb": "Ja",
  "Reifengröße": "60-406",
  "Fahrradschloss": "Abus i:SY-Set gleichschließend, bestehend aus Akku- und Rahmenschloss (BLO BOS DT3.2 + 4750SL NR)",
  "Fahrradständer": "Pletscher Kickstand Comp40 Flex"
}

Raw adapter output

{
  "retailer": "zweirad-stadler",
  "retailerProductId": "i-sy-s8-zr-rt-belt-545-kompaktrad-20-schwarz",
  "productUrl": "https://shop.zweirad-stadler.de/fahrrad-shop/e-bikes/e-kompaktrad/i-sy-s8-zr-rt-belt-545-kompaktrad-20-schwarz.html",
  "extractionMethod": "server-html",
  "sourceCategory": "e-bike",
  "rawTitle": "i:SY S8 ZR RT Belt 545 Kompaktrad 20\" schwarz",
  "rawBrand": "i:SY",
  "price": 3899,
  "originalPrice": null,
  "currency": "EUR",
  "imageUrl": "https://shop.zweirad-stadler.de/out/pictures/generated/product/1/1500_1500_100/isy-s8-zr-rt-belt-545-schwarz-kompaktrad-20-134800-a.jpg",
  "rawSpecifications": {
    "Material": "Aluminium",
    "Farbe": "schwarz",
    "Gabel": "Original I:SY Starrgabel",
    "Steuersatz": "i:SY Steuersatz",
    "Schaltung": "Nabenschaltung",
    "Gänge": "8-Gang",
    "Schaltwerk": "Shimano Nexus",
    "Schalthebel": "Shimano Nexus Revoshifter",
    "Bremsenart": "Hydraulische Scheibenbremsen",
    "Bremshebel": "3-Finger Bremshebel",
    "Bremsscheiben": "180 mm/ 180 mm",
    "Rücktrittbremse": "Ja",
    "Kurbel": "i:SY E-Bike Kurbel",
    "Pedale": "i:SY Antirutsch Faltpedal",
    "Kassette": "63/22T",
    "Lenker": "i:SY Lenker 30°",
    "Griffe": "ERGON GC10 ERGONomische Griffe",
    "Vorbau": "i:SY Vorbau 70 mm",
    "Sattelstütze": "By.Schulz G.2 ST",
    "Sattel": "ZECURE Hydro Foam, Gr. M",
    "Laufradgröße": "20\"",
    "Felgen": "Ryde Andra40 20\"",
    "Speichen": "32xNiro 2,0 mm",
    "Reifen": "Schwalbe Pick Up, Super Defense, 60-406",
    "Nabe vorne": "Shimano Deore HB-M5100, Centerlock",
    "Nabe hinten": "Shimano SG-C6001-8D",
    "Motorart": "Mittelmotor",
    "Motorhersteller": "Bosch",
    "Motor": "Bosch Active Line Plus",
    "Max. Drehmoment": "60 Nm",
    "Unterstützung": "bis 25 km/h",
    "Kapazität": "545 Wh",
    "Ladegerät": "Bosch 4A Charger",
    "Display": "Bosch Intuvia 100",
    "Scheinwerfer": "FUXON FF-100EB, 100 Lux LED mit Fernlicht",
    "Rücklicht": "FUXON R-Glow S LED Rücklicht",
    "Gepäckträger": "i:SY Carrier 2.0 Monkey Load Ready",
    "Schutzbleche": "SKS Bluemels 20 Zoll, Breite 65 mm",
    "Gewicht": "ca. 24,7 kg",
    "zul. Gesamtgewicht": "max. 150 kg",
    "Rahmenform": "Kompakt",
    "Herstellerfarbe": "pepper black",
    "Bremsen vorne": "Tektro HD-T280, hydraulische 2-Kolben Scheibenbremse",
    "Bremsen hinten": "Tektro HD-T280, hydraulische 2-Kolben Scheibenbremse",
    "Riemenantrieb": "Ja",
    "Reifengröße": "60-406",
    "Fahrradschloss": "Abus i:SY-Set gleichschließend, bestehend aus Akku- und Rahmenschloss (BLO BOS DT3.2 + 4750SL NR)",
    "Fahrradständer": "Pletscher Kickstand Comp40 Flex"
  },
  "rawFeatures": [
    "47 cm (Onesize) 4-8 Werktage",
    "0% Finanzierung ab 389,90 € möglich",
    "Dienstrad-Leasing möglich",
    "14 Tage kostenloses Rückgaberecht",
    "Unsere E-Bikes werden alle vor der Auslieferung fachmännisch montiert und von unseren Werkstatt-Profis Probe gefahren",
    "Entdecken Sie das vielseitige i:SY S8 ZR RT Belt Kompaktrad, jetzt ausgestattet mit dem innovativen und wartungsarmen GATES CDX Zahnriemen. Dieses Premium-E-Bike Kompakt kombiniert die bewährte SHIMANO Nexus 8-Gang Nabenschaltung mit dem harmonischen BOSCH Active Line Plus Motor für ein müheloses Fahrerlebnis im Alltag und auf Touren.",
    "Bosch Active Line Plus (Smart System) Motor 60 Nm",
    "8-Gang Shimano Nexus Nabenschaltung mit Gates CDX Zahnriemen-Antrieb",
    "Tektro Hydraulische Scheibenbremsen plus Rücktrittbremse",
    "Gewicht lt. Hersteller: ca. 24,7 kg",
    "Zul. Gesamtgewicht: max. 150 kg",
    "Technische Maße ca.: Länge: 160,9 cm; Höhe: 113,4 cm; Breite: 28 cm; Einstiegshöhe: 48 cm"
  ],
  "rawSizes": [
    {
      "rawSize": "47 cm (Onesize)",
      "size": "47",
      "sizeCm": 47,
      "inStock": true,
      "stockCount": null,
      "price": null,
      "deliveryNote": "4-8 Werktage"
    }
  ],
  "availabilityText": "1 of 1 sizes orderable",
  "fetchedAt": "2026-09-26T08:25:18.754Z",
  "sourceMeta": {
    "savingBadge": null,
    "deliveryWindows": [
      "47 cm (Onesize) 4-8 Werktage"
    ]
  },
  "listingPath": [
    "E-Bikes",
    "E-Kompaktrad"
  ]
}

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