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DURA-ACE 10速クランクセット FC-7900 172.5mm
Price
17000円
(Tax included)
S$17000
Specifications
Quantity
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Seller Rating
96.3% Good(1002) Normal(18) Bad(20)
Condition
Damaged or stained
Shipping
Free shipping to Japan
Listed Time
2026-05-01 08:08:36
Updated Time
2026-05-06 18:54:10

DURA-ACE 10速クランクセット FC-7900 172.5mm

高剛性アルミニウム製のエアロダイナミクスデザインのDURA-ACEクランクセット。
172.5mm,53-39t

正直なところ、重量に関してはオマケでしか無い…そうやって言い切ってしまっても良いくらい素晴らしい変速性能と剛性を持っているクランクです。

何だかんだで、クランクに関してはフルクラム、REDと来て、デュラエースと来て、主要なメーカーのフラッグシップモデルはほぼ全て使った…と言っても良いところまで来たと思っています。

クランクに関しては重量よりもPCDや剛性、Q-ファクターといったファクターが重要だと思っているのでこの79デュラのクランクは衝撃的でした。

楕円論の記事で79デュラのFDが素晴らしい…と書いた記憶がありますが、あのFDに対応するクランクはこういった方向性を持って設計されているのか…と驚きました。

・クランクアームの剛性

クランクアームの剛性は非常に高いです。全く駆動ロスを感じません。クリートを外す動きをしても全く歪みません。これはゴッサマークランクやシマノの下位グレードから乗り換えるとよく解りますが、REDクランクよりも確実に硬いと感じました。

・ギア板の変速ピンの配置の素晴らしさ

どこからFDを操作しても一発でインナーからアウターに上がります。低級グレードのクランクに付属してくるギア板だと、何回かガチャガチャ言ってから上がるような酷いパーツもありますが、一発で上がります。同様に、アウターからインナーに落とす際も軽快に移動します。変速性能の高さはやはりシマノが別格です。

重量は725g(170mm、53×39T)で、FC-7800の740gよりも15gもの軽量化を実現している。

・ギア板の剛性の高さ

試しに、止まった状態でインナーからアウターへシフトアップする方向へSTIを動かしてみました。通常なら、ギア板が撓むんですが、全く撓みません。ビクともしません。クランクスピンドル、クランクアーム、ギア板、この全ての剛性が高次元でバランスされているのでしょう。

51331円+税


- ブランド: DURA-ACE
- モデル: クランクセット
- 特徴: 高剛性アルミニウム製
- デザイン: エアロダイナミクスデザイン
- 色: シルバー

ご覧いただきありがとうございます。
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Notes:

  • The billing weight will be based on whichever is greater: the actual weight or the volumetric weight.
  • Volumetric weight (kg) = Length (cm) x Width (cm) x Height (cm) / 5000
  • Common oversized and heavy items include: furniture, fishing rods, automotive parts, etc.
  • Consolidating 2 or more items will incur a "consolidation handling fee" (see price list for details)
    

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2. Each mercari item is shipped individually. Orders from the same seller will be processed separately, resulting in multiple handling fees and local Japanese shipping charges. Combined shipping is not available.
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1. International Shipping

Air freight: If the arrival notice exceeds seven days and the status of the goods is not confirmed, a customer complaint will occur and the seller will not be able to report it.

2. local delivery

After receiving and inspecting the goods, if you have any questions, please contact Alfred 24 customer service staff within 48 hours after receipt, and let Alfred 24 make a decision. letao will try its best to provide relevant information to assist members in processing. The following are reminders:

1. You can leave a message through "Customer Service Message" and provide local express delivery in Order number and have the following information ready:
● Product outer box/unboxing photos
● Photos of damaged goods

2. Alfred24’s liability for any shipment, including but not limited to loss or damage, is limited to actual direct losses and shall not exceed the upper limit of HK$500 per shipment; if it is sent to a Post Smart Mail station or post office The maximum compensation limit for each shipment is HKD 320.

The following are product types that are not eligible for compensation by Alfred 24:
▲ The shipment is flammable or explosive, or is easily moldy, rotten and/or discolored, etc.
▲The shipment is fragile
▲The shipment is a liquid product
▲The recipient’s address is incorrect or invalid
▲The recipient’s contact number is invalid or the text message cannot be received
▲Any unpredictable or force majeure factors
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