i:SY Skyfly E5 ZR RT PX E-Bike Kompaktrad 20" grau

zweirad-stadler:i-sy-skyfly-e5-zr-rt-px-e-bike-kompaktrad-20-grau · 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 | Skyfly E5 ZR RT PX E-Bike Kompaktrad 20" | Nexus
Confidence: medium

brand exact (I:sy)
model normalized to "skyfly e5 zr rt px e 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	€5.799	47 cm (Onesize)	debug
Zweirad Stadler	€5.799	47 cm (Onesize)	debug

retailer

price

sizes in stock

Zweirad Stadler

€5.799

47 cm (Onesize)

debug

Zweirad Stadler

€5.799

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 Skyfly E5 ZR RT PX E-Bike Kompaktrad 20" grau

category retailer:zweirad-stadler / parse E-Bike

frameMaterial retailer:zweirad-stadler / parse Carbon

groupsetFamily retailer:zweirad-stadler / dictionary Shimano Nexus Revo Shifter || Shimano Nexus

electronicShifting retailer:zweirad-stadler / derived Shimano Nexus Revo Shifter || Shimano Nexus

speeds retailer:zweirad-stadler / parse 5-Gang

brakes retailer:zweirad-stadler / parse hydraulische

brakePistons retailer:zweirad-stadler / parse 4 Kolben

suspension retailer:zweirad-stadler / derived Starrgabel

fork retailer:zweirad-stadler / dictionary Starrgabel

dropperPost retailer:zweirad-stadler / derived seatpost row "i:SY Sattelstütze, 415 mm, ⌀ 34,9mm" names no dropper, in a 41-field spec table

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

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. 19,8 kg

powerMeter retailer:zweirad-stadler / derived absent from a 41-field spec table

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

ebike.motor retailer:zweirad-stadler / parse Bosch | Bosch Performance Line PX

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

ebike.motor.torqueNm retailer:zweirad-stadler / parse 90 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 Kiox 500 mit Mini Remote

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 Skyfly E5 ZR RT PX E-Bike Kompaktrad 20" grau
category	`retailer:zweirad-stadler` / parse	E-Bike
frameMaterial	`retailer:zweirad-stadler` / parse	Carbon
groupsetFamily	`retailer:zweirad-stadler` / dictionary	Shimano Nexus Revo Shifter \|\| Shimano Nexus
electronicShifting	`retailer:zweirad-stadler` / derived	Shimano Nexus Revo Shifter \|\| Shimano Nexus
speeds	`retailer:zweirad-stadler` / parse	5-Gang
brakes	`retailer:zweirad-stadler` / parse	hydraulische
brakePistons	`retailer:zweirad-stadler` / parse	4 Kolben
suspension	`retailer:zweirad-stadler` / derived	Starrgabel
fork	`retailer:zweirad-stadler` / dictionary	Starrgabel
dropperPost	`retailer:zweirad-stadler` / derived	seatpost row "i:SY Sattelstütze, 415 mm, ⌀ 34,9mm" names no dropper, in a 41-field spec table
rack	`retailer:zweirad-stadler` / parse	i:SY Carrier 2.0 MonkeyLoad Ready
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. 19,8 kg
powerMeter	`retailer:zweirad-stadler` / derived	absent from a 41-field spec table
availability	`retailer:zweirad-stadler` / derived	1 of 1 sizes orderable
ebike.motor	`retailer:zweirad-stadler` / parse	Bosch \| Bosch Performance Line PX
ebike.motor.position	`retailer:zweirad-stadler` / parse	Mittelmotor
ebike.motor.torqueNm	`retailer:zweirad-stadler` / parse	90 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 Kiox 500 mit Mini Remote
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": 26,
  "drivetrainScore": 0,
  "wheelScore": 5,
  "extrasScore": 0,
  "suspensionScore": 2,
  "weightAdjustment": -3,
  "equipmentValue": 30,
  "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.",
    "19.8 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": "The source names the Ryde Disc30 20” rims but does not establish their material or a defensible wheel tier. No power meter is mentioned.",
  "raw": {
    "frameMaterial": {
      "value": "carbon",
      "evidence": "Material: Carbon",
      "confidence": 1
    },
    "groupsetBrand": {
      "value": "Shimano",
      "evidence": "Schaltwerk: Shimano Nexus",
      "confidence": 1
    },
    "groupsetFamily": {
      "value": "Nexus",
      "evidence": "5-Gang Shimano Nexus Nabenschaltung",
      "confidence": 1
    },
    "electronicShifting": {
      "value": "false",
      "evidence": "Schalthebel: Shimano Nexus Revo Shifter",
      "confidence": 0.98
    },
    "speeds": {
      "value": "5",
      "evidence": "Gänge: 5-Gang",
      "confidence": 1
    },
    "mixedGroupset": {
      "value": "false",
      "evidence": "5-Gang Shimano Nexus Nabenschaltung",
      "confidence": 0.9
    },
    "wheelMaterial": {
      "value": null,
      "evidence": null,
      "confidence": 0.99
    },
    "wheelTier": {
      "value": null,
      "evidence": null,
      "confidence": 1
    },
    "brakes": {
      "value": "hydraulic-disc",
      "evidence": "Bremsen vorne: TEKTRO HD-T532, hydraulische 4 Kolben Scheibenbremse",
      "confidence": 1
    },
    "weightKg": {
      "value": "19.8",
      "evidence": "Gewicht: ca. 19,8 kg",
      "confidence": 1
    },
    "powerMeter": {
      "value": null,
      "evidence": null,
      "confidence": 1
    },
    "notes": "The source names the Ryde Disc30 20” rims but does not establish their material or a defensible wheel tier. No power meter is mentioned."
  }
}

Normalized record

{
  "id": "zweirad-stadler:i-sy-skyfly-e5-zr-rt-px-e-bike-kompaktrad-20-grau",
  "retailer": "zweirad-stadler",
  "retailerProductId": "i-sy-skyfly-e5-zr-rt-px-e-bike-kompaktrad-20-grau",
  "productUrl": "https://shop.zweirad-stadler.de/fahrrad-shop/e-bikes/e-kompaktrad/i-sy-skyfly-e5-zr-rt-px-e-bike-kompaktrad-20-grau.html",
  "brand": "I:sy",
  "model": "Skyfly E5 ZR RT PX E-Bike Kompaktrad 20\" grau",
  "modelYear": null,
  "category": "e-bike",
  "categoryBasis": "stated",
  "sourceCategory": "e-bike",
  "price": 5799,
  "originalPrice": null,
  "currency": "EUR",
  "discountPercent": null,
  "frameMaterial": "carbon",
  "frameModel": null,
  "frameTier": null,
  "groupsetBrand": "Shimano",
  "groupsetFamily": "Nexus",
  "groupsetGeneration": null,
  "electronicShifting": false,
  "speeds": 5,
  "mixedGroupset": false,
  "groupsetComponents": {
    "shifters": "Nexus",
    "rearDerailleur": "Nexus"
  },
  "groupsetTierSpread": 0,
  "crank": "i:SY E-Bike Kurbel",
  "cassette": "46/28T",
  "brakes": "hydraulic-disc",
  "brakePistons": 4,
  "brakeTier": "unknown",
  "suspension": "none",
  "fork": {
    "make": null,
    "line": null,
    "tier": "rigid",
    "travelMm": 0
  },
  "rearShock": null,
  "dropperPost": false,
  "beltDrive": null,
  "hubDynamo": null,
  "rack": true,
  "mudguards": null,
  "chaincase": null,
  "kickstand": true,
  "lighting": true,
  "wheelSize": "other",
  "wheelset": "Ryde Disc30 20”",
  "wheelMaterial": "unknown",
  "wheelTier": "unknown",
  "tyres": "SCHWALBE Super MotoX, faltbar, 62-406",
  "weightKg": 19.8,
  "ebike": {
    "motor": {
      "text": "Bosch | Bosch Performance Line PX",
      "brand": "bosch",
      "model": "bosch-performance-line-px-bdu347y",
      "position": "mid",
      "torqueNm": 90,
      "torqueSource": "retailer",
      "ratedPowerW": null,
      "peakPowerW": null
    },
    "battery": {
      "text": null,
      "capacityWh": 545,
      "count": null,
      "integration": "unknown",
      "removable": null
    },
    "speedClass": "pedelec-25",
    "rangeExtender": "unknown",
    "display": "Bosch Kiox 500 mit Mini Remote",
    "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-skyfly-e5-zr-rt-px-grau-20-134804-a.jpg",
  "rawTitle": "i:SY Skyfly E5 ZR RT PX E-Bike Kompaktrad 20\" grau",
  "fetchedAt": "2026-09-26T08:25:28.811Z",
  "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": [
      "batteryWh",
      "batteryIntegration",
      "frameShape"
    ],
    "applied": [
      "batteryWh"
    ],
    "rejected": [],
    "notes": "The source names the motor as “Bosch Performance Line PX” but does not establish one of the exact permitted motor-unit models. “Rahmenform: Kompakt” does not deterministically map to diamond, trapeze, or step-through. Battery integration is not specified.",
    "raw": {
      "motorBrand": {
        "value": "bosch",
        "evidence": "Motorhersteller: Bosch",
        "confidence": 1
      },
      "motorModel": {
        "value": null,
        "evidence": null,
        "confidence": 0
      },
      "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": 0
      },
      "frameShape": {
        "value": null,
        "evidence": null,
        "confidence": 0
      },
      "notes": "The source names the motor as “Bosch Performance Line PX” but does not establish one of the exact permitted motor-unit models. “Rahmenform: Kompakt” does not deterministically map to diamond, trapeze, or step-through. Battery integration is not specified."
    }
  }
}

Parsed specification table

{
  "Material": "Carbon",
  "Farbe": "grau",
  "Gabel": "Original i:SY Carbon Starrgabel",
  "Steuersatz": "i:SY Steuersatz",
  "Schaltung": "Nabenschaltung",
  "Gänge": "5-Gang",
  "Schaltwerk": "Shimano Nexus",
  "Schalthebel": "Shimano Nexus Revo Shifter",
  "Bremshebel": "3-Finger Bremshebel",
  "Bremsscheiben": "180 mm/ 180 mm",
  "Rücktrittbremse": "Ja",
  "Kurbel": "i:SY E-Bike Kurbel",
  "Pedale": "i:SY Antirutsch Faltpedal",
  "Kassette": "46/28T",
  "Lenker": "i:SY Lenker 30°",
  "Sattelstütze": "i:SY Sattelstütze, 415 mm, ⌀ 34,9mm",
  "Sattel": "ZECURE, Hydro Foam, Gr. M",
  "Laufradgröße": "20\"",
  "Felgen": "Ryde Disc30 20”",
  "Speichen": "32x Niro 2,0 mm",
  "Reifen": "SCHWALBE Super MotoX, faltbar, 62-406",
  "Motorart": "Mittelmotor",
  "Motorhersteller": "Bosch",
  "Motor": "Bosch Performance Line PX",
  "Max. Drehmoment": "90 Nm",
  "Unterstützung": "bis 25 km/h",
  "Kapazität": "545 Wh",
  "Ladegerät": "Bosch 4A Charger",
  "Display": "Bosch Kiox 500 mit Mini Remote",
  "Scheinwerfer": "FUXON FF-100EB, 100 Lux LED mit Fernlicht",
  "Rücklicht": "FUXON RL 130 EB",
  "Gepäckträger": "i:SY Carrier 2.0 MonkeyLoad Ready",
  "Gewicht": "ca. 19,8 kg",
  "zul. Gesamtgewicht": "max. 150 kg",
  "Rahmenform": "Kompakt",
  "Herstellerfarbe": "dotty grey",
  "Bremsen vorne": "TEKTRO HD-T532, hydraulische 4 Kolben Scheibenbremse",
  "Bremsen hinten": "TEKTRO HD-T532, hydraulische 2 Kolben Scheibenbremse",
  "Reifengröße": "62-406",
  "Fahrradschloss": "Abus Akkuschloss BLO BOS DT3.2 XPLUS",
  "Fahrradständer": "PLETSCHER Kickstand Comp40 Flex"
}

Raw adapter output

{
  "retailer": "zweirad-stadler",
  "retailerProductId": "i-sy-skyfly-e5-zr-rt-px-e-bike-kompaktrad-20-grau",
  "productUrl": "https://shop.zweirad-stadler.de/fahrrad-shop/e-bikes/e-kompaktrad/i-sy-skyfly-e5-zr-rt-px-e-bike-kompaktrad-20-grau.html",
  "extractionMethod": "server-html",
  "sourceCategory": "e-bike",
  "rawTitle": "i:SY Skyfly E5 ZR RT PX E-Bike Kompaktrad 20\" grau",
  "rawBrand": "i:SY",
  "price": 5799,
  "originalPrice": null,
  "currency": "EUR",
  "imageUrl": "https://shop.zweirad-stadler.de/out/pictures/generated/product/1/1500_1500_100/isy-skyfly-e5-zr-rt-px-grau-20-134804-a.jpg",
  "rawSpecifications": {
    "Material": "Carbon",
    "Farbe": "grau",
    "Gabel": "Original i:SY Carbon Starrgabel",
    "Steuersatz": "i:SY Steuersatz",
    "Schaltung": "Nabenschaltung",
    "Gänge": "5-Gang",
    "Schaltwerk": "Shimano Nexus",
    "Schalthebel": "Shimano Nexus Revo Shifter",
    "Bremshebel": "3-Finger Bremshebel",
    "Bremsscheiben": "180 mm/ 180 mm",
    "Rücktrittbremse": "Ja",
    "Kurbel": "i:SY E-Bike Kurbel",
    "Pedale": "i:SY Antirutsch Faltpedal",
    "Kassette": "46/28T",
    "Lenker": "i:SY Lenker 30°",
    "Sattelstütze": "i:SY Sattelstütze, 415 mm, ⌀ 34,9mm",
    "Sattel": "ZECURE, Hydro Foam, Gr. M",
    "Laufradgröße": "20\"",
    "Felgen": "Ryde Disc30 20”",
    "Speichen": "32x Niro 2,0 mm",
    "Reifen": "SCHWALBE Super MotoX, faltbar, 62-406",
    "Motorart": "Mittelmotor",
    "Motorhersteller": "Bosch",
    "Motor": "Bosch Performance Line PX",
    "Max. Drehmoment": "90 Nm",
    "Unterstützung": "bis 25 km/h",
    "Kapazität": "545 Wh",
    "Ladegerät": "Bosch 4A Charger",
    "Display": "Bosch Kiox 500 mit Mini Remote",
    "Scheinwerfer": "FUXON FF-100EB, 100 Lux LED mit Fernlicht",
    "Rücklicht": "FUXON RL 130 EB",
    "Gepäckträger": "i:SY Carrier 2.0 MonkeyLoad Ready",
    "Gewicht": "ca. 19,8 kg",
    "zul. Gesamtgewicht": "max. 150 kg",
    "Rahmenform": "Kompakt",
    "Herstellerfarbe": "dotty grey",
    "Bremsen vorne": "TEKTRO HD-T532, hydraulische 4 Kolben Scheibenbremse",
    "Bremsen hinten": "TEKTRO HD-T532, hydraulische 2 Kolben Scheibenbremse",
    "Reifengröße": "62-406",
    "Fahrradschloss": "Abus Akkuschloss BLO BOS DT3.2 XPLUS",
    "Fahrradständer": "PLETSCHER Kickstand Comp40 Flex"
  },
  "rawFeatures": [
    "47 cm (Onesize) 4-8 Werktage",
    "0% Finanzierung ab 579,90 € 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",
    "Erleben Sie Leichtigkeit gepaart mit maximaler Kraft und einem unvergleichlichen Fahrgefühl. Das i:SY SKYFLY E5 ZR RT PX ist ein Premium-E-Kompaktrad aus ultraleichtem Carbon, das für anspruchsvolle Touren und den dynamischen Alltag entwickelt wurde.",
    "Bosch Performance Line PX Motor (Smart System) 90 Nm",
    "5-Gang Shimano Nexus Nabenschaltung mit Gates Zahnriemen-Antrieb",
    "Tektro Hydraulische Scheibenbremsen",
    "Gewicht lt. Hersteller: ca. 19,8 kg",
    "Zul. Gesamtgewicht: max. 150 kg",
    "Unterstützung: bis 25 km/h"
  ],
  "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": "2026-09-26T08:25:28.811Z",
  "sourceMeta": {
    "savingBadge": null,
    "deliveryWindows": [
      "47 cm (Onesize) 4-8 Werktage"
    ]
  },
  "listingPath": [
    "E-Bikes",
    "E-Kompaktrad"
  ]
}

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