描述
SHIMANO DEORE XT FD-M8100-M 前變速器（束環式）
SIDE SWING 側擺技術，為 2×12 速現代林道車而設。
SHIMANO DEORE XT FD-M8100-M 採用 SIDE SWING 側擺技術，鏈條沿鏈條路徑方向水平移動，帶來直接、低摩擦且高效的前變速表現。前拉式走線大幅降低操作力度，同時提供額外輪胎間隙，兼容更寬輪圈上的 2.3 吋外胎，適合長行程及全避震車種。
為何選擇 FD-M8100-M？
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SIDE SWING 側擺技術：鏈條水平移動，變速直接、低摩擦、高效
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前拉式走線：走線從前方進入，操作力度輕巧
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超寬齒比範圍：支援前雙 36-26T 組合
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更寬的牽引範圍：長行程車種亦無鏈條摩擦
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更大輪胎間隙：兼容寬輪圈上的 2.3 吋外胎
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廣泛車架安裝兼容性：提供 D、E、M 型支架
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兼容 48.8mm 及 51.8mm Chain Line：單一規格對應兩種 Chain Line
適合哪些騎乘？
登山車、林道、越野、長行程及全避震車種。
技術規格
| 項目 | 規格 |
|---|---|
| 型號 | FD-M8100-M |
| 系列 | SHIMANO DEORE XT M8100 |
| 前變速別 | 2 速 |
| 後變速別 | 12 速 |
| 相容鏈條 | HG 12 速 |
| 走線類型 | 前拉式（Front-Pull） |
| 擺動方式 | SIDE SWING 側擺式 |
| Chain Line | 48.8mm（142mm O.L.D.）/ 51.8mm（148mm O.L.D.） |
| 後下叉角度 | 66-69° |
| 相容最大齒片 | 36-38T |
| 總齒包容量 | 10T |
| 安裝類型 | 中位束環式（Mid Clamp） |
| 束環直徑 | 34.9mm（31.8mm 需 M 尺寸轉接座；28.6mm 需 S 尺寸轉接座） |
| 角度調整螺絲 | 有 |
| 有角度的束環設計 | 有 |
| 連桿軸襯 | 6 |
| 平均重量 | 約 114g |
兼容性
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變速把手：SL-M8100、SL-M8100-IR 等 DEORE XT 12 速左手變把
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曲柄：FC-M8100-2、FC-M8120-2 等 DEORE XT 12 速雙片曲柄
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鏈條：CN-M8100、CN-M7100 等 HG 12 速鏈條
備註
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M 型束環需搭配轉接座：34.9mm 為標準規格；31.8mm 需 M 尺寸轉接座；28.6mm 需 S 尺寸轉接座（S 尺寸僅提供 OTC 包裝）。
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由於前拉式走線，變速線必須沿下管內側或上方走線。
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安裝需使用合適工具，建議由合資格技師安裝。
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購買前請確認車架安裝類型及後下叉角度。
SHIMANO DEORE XT FD-M8100-M FRONT DERAILLEUR (Clamp Band Mount)
SIDE SWING Technology for Modern 2×12-Speed Trail Bikes.
The SHIMANO DEORE XT FD-M8100-M features SIDE SWING technology, with the chain moving horizontally along the chain path for direct, low-friction and efficient front shifting. The front-pull cable routing significantly reduces shifting effort, while providing additional tire clearance for 2.3-inch tires on wider rims, ideal for long-travel and full-suspension bikes.
Why FD-M8100-M?
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SIDE SWING Technology: Horizontal chain movement for direct, low-friction, efficient shifting
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Front-Pull Cable Routing: Cable enters from the front for light shifting action
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Extra-Wide Gear Range: Supports front double 36-26T combination
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Increased Traction Range: No chain rub even on long-travel bikes
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Greater Tire Clearance: Compatible with 2.3-inch tires on wider rims
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Wide Frame Mounting Compatibility: Available in D, E, and M-type mounts
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48.8mm & 51.8mm Chainline Compatible: One spec fits both chainlines
Ideal For
Mountain biking, trail riding, off-road, long-travel and full-suspension bikes.
Technical Specifications
| Item | Specification |
|---|---|
| Model | FD-M8100-M |
| Series | SHIMANO DEORE XT M8100 |
| Front Speeds | 2 |
| Rear Speeds | 12 |
| Compatible Chain | HG 12-speed |
| Cable Route Type | Front-Pull |
| Swing Action | SIDE SWING |
| Chain Line | 48.8mm (142mm O.L.D.) / 51.8mm (148mm O.L.D.) |
| Chainstay Angle | 66-69° |
| Max Chainring | 36-38T |
| Total Capacity | 10T |
| Mount Type | Mid Clamp |
| Clamp Diameter | 34.9mm (31.8mm with M-size adapter; 28.6mm with S-size adapter) |
| Angled Stroke Adjust Screw | Yes |
| Angled Clamp Band Design | Yes |
| Link Bushings | 6 |
| Average Weight | Approx. 114g |
Compatibility
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Shifters: SL-M8100, SL-M8100-IR and other DEORE XT 12-speed left shifters
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Cranks: FC-M8100-2, FC-M8120-2 and other DEORE XT 12-speed double cranks
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Chain: CN-M8100, CN-M7100 and other HG 12-speed chains
Notes
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M-type clamp requires adapter: 34.9mm is standard; 31.8mm requires M-size adapter; 28.6mm requires S-size adapter (S-size available in OTC packaging only) .
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Due to the front-pull routing, the shift cable must be routed inside or above the down tube.
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Professional installation recommended; requires appropriate tools.
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Please verify frame mount type and chainstay angle before purchase.
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