描述
SHIMANO ULTEGRA FC-R8100 十二速齒片
產品概述
SHIMANO ULTEGRA FC-R8100 齒片是 ULTEGRA R8100 2×12 速公路曲柄組的專用替換齒片,同時兼容 FC-R8100-P 功率計版本 。外片採用 HOLLOWGLIDE 中空技術,以鋁合金配合碳纖維增強複合材料(CFRP)製成,在減輕重量的同時維持高剛性,提升動力傳輸效率與前變速的速度和精準度 。
主要特點
HOLLOWGLIDE 中空外齒片
外片以中空結構製成,重量輕且強度高,帶來更佳的動力傳輸性能,以及更快速、更精準的前變速體驗 。
鋁合金 + CFRP 複合材質
50T 及 52T 外片採用鋁合金與碳纖維增強塑料(CFRP)複合材質;34T 及 36T 內片為陽極氧化鋁合金 。
精準配對設計
齒片有特定 Type 編碼(NK / NH),必須同類型配對使用以確保最佳變速性能 。
技術規格
| 項目 | 規格 |
|---|---|
| 系列 | ULTEGRA R8100 |
| 變速別 | 2×12 速 |
| BCD | 110 mm,4 臂 |
| 兼容鏈條 | HG 12 速 |
| 齒盤組合 | 46-36T、50-34T、52-36T |
| 材質(外片) | 鋁合金 / CFRP(50-52T)、鋁合金(46T) |
| 材質(內片) | 陽極氧化鋁合金 |
| 表面處理 | 陽極氧化 |
可選齒數
| 齒數 | 位置 | 搭配組合 | Type 編碼 |
|---|---|---|---|
| 34T | 內片 | 50T | NK |
| 36T | 內片 | 52T / 46T | NH |
| 46T | 外片 | 36T | — |
| 50T | 外片 | 34T | — |
| 52T | 外片 | 36T | — |
相容性
-
曲柄:ULTEGRA FC-R8100、FC-R8100-P(功率計版本)
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Chain Line:44.5 mm
備註
-
齒片必須同 Type 編碼配對使用(如 NK 只能配 NK),否則可能影響變速性能 。
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外片與內片分開銷售,購買前請確認所需位置及齒數。
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安裝需使用曲柄固定螺絲,部分型號隨附。
Product Overview
The SHIMANO ULTEGRA FC-R8100 chainring is a replacement ring for the ULTEGRA R8100 2×12-speed road crankset, also compatible with the FC-R8100-P power meter version . The outer ring uses HOLLOWGLIDE hollow construction with an aluminium-CFRP composite, reducing weight while maintaining high stiffness for efficient power transfer and fast, precise front shifting .
Key Features
HOLLOWGLIDE Hollow Outer Chainring
The hollow-constructed outer ring is lightweight yet strong, delivering better power transfer and faster, more precise front shifting .
Aluminium + CFRP Composite
50T and 52T outer rings use aluminium with carbon fiber reinforced plastic (CFRP); 34T and 36T inner rings are anodized aluminium .
Precision Pairing
Chainrings have specific Type codes (NK / NH) and must be paired with the same type for optimal shifting performance .
Technical Specifications
| Item | Specification |
|---|---|
| Series | ULTEGRA R8100 |
| Speeds | 2×12-speed |
| BCD | 110 mm, 4-arm |
| Compatible Chain | HG 12-speed |
| Chainring Combos | 46-36T, 50-34T, 52-36T |
| Material (Outer) | Aluminium / CFRP (50-52T), Aluminium (46T) |
| Material (Inner) | Anodized Aluminium |
| Finish | Anodized |
Available Teeth
| Teeth | Position | Pairing | Type Code |
|---|---|---|---|
| 34T | Inner | 50T | NK |
| 36T | Inner | 52T / 46T | NH |
| 46T | Outer | 36T | — |
| 50T | Outer | 34T | — |
| 52T | Outer | 36T | — |
Compatibility
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Cranks: ULTEGRA FC-R8100, FC-R8100-P (power meter version)
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Chain Line: 44.5 mm
Notes
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Chainrings must be paired with the same Type code (e.g., NK only with NK); mixed pairing may affect shifting performance .
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Outer and inner rings are sold separately; confirm position and teeth before purchase.
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Installation requires crank fixing screws, included with some models.







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