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Yahoo Bid Sports & Recreation Bicycles & Cycling Parts Stems 80 mm
Crankbrothers Cobalt 11
 
        

  • Product Quantity
    : 1
  • Starting Bid
    :1,000円
  • Highest Bidder
    : ast******** / Rating:1786
  • Listing Date
    :2026年03月08日 10時53分
  • Bidding closes on
    :2026年03月14日 10時45分
  • Auction Number
    :f1222161189
  • Condition
    :New product
  • Automatic Extension
    :Yes
  • Authentication
    :No
  • Early Closing
    :Yes
  • Can I return the product?
    :no
  • Description
  • Q&A ()
  • Cost Estimator
  • Problem Item Response Procedur
Notes
  1. Because it is difficult to ship bicycles, most sellers only allow self-pickup. Please confirm whether it can be sent and the shipping fee to avoid unpleasant shopping.
  2. We cannot assist in shipping and purchasing steering wheels that contain airbags. If they do not contain airbags, press Confirm to place a bid.
3枚目の画像からGrokで調べました
出品するのは画像に写っているものがすべてです。

Crankbrothers Cobalt 11(クランクブラザーズ コバルト11)というカーボンステムのクランプ部分です!
刻印のC11MTCは「Cobalt 11 MTC」の略で、Cobalt 11シリーズのモデルコード(MTCはおそらくMountain/Trail/Cross-countryや特定のバリエーションを示す内部表記)です。
主な特徴

ブランド: Crankbrothers(アメリカの有名コンポーネントメーカー。ペダルで超有名ですが、ステムもハイエンドを出していました)
モデル: Cobalt 11(フラッグシップのカーボンXC/レースステム。2010年代前半〜中盤の製品)
長さ: 90mm(刻印に「90mm」と明記)
角度: ±6°(6度アップ/ダウン対応。XCレースで人気のフラット寄り角度)
クランプ径: 31.8mm(標準オーバーサイズハンドルバー用)
素材: 高弾性率(High modulus)ユニディレクショナルカーボンファイバー(単一方向積層)の一体成形
重量: 約100〜110g前後(90mmで超軽量クラス。当時最軽量級のXCステムとして宣伝)
クランプ方式: ステアラーチューブ側とハンドルバー側ともにTorxボルト(T25かT30あたり)で、シングルボルトまたはウェッジ式クランプ(写真ではクランプが分割され、ボルトで締め込むタイプ)
対応: 主にXCレース、クロスカントリー、軽量グラベルやロード寄りのMTBに最適。31.8mmハンドルバーと1-1/8"ステアラー対応
その他: クランプ面に均等に力が分散する設計で、ハンドルバーを傷めにくい。耐久性も高く評価されていました

デザインのポイント(写真から)

マット/サテングレーっぽいメタリック仕上げ(一部モデルでブラック/ゴールドやMetallic Black/Goldあり)
クランプ部に「cobalt」「90mm」「C11MTC」「6°/±6° race」など細かく刻印
ボディに小さなロゴマーク(∞のような∞や○)が見えるのもCrankbrothersらしい
全体的にスリムで洗練された形状(当時の軽量ステムのトレンド)

現在の状況

Cobalt 11は今は生産終了の旧モデル(2010〜2015年頃の製品)。中古市場や在庫で人気があります
当時「最軽量XCステム」の一つとして、プロレース(特にXCワールドカップ)で使われていた逸品
重量を極限まで削った分、剛性は十分にありつつ振動吸収も良いと評判
後継モデルは出ていないので、今でも「伝説の軽量カーボンステム」として一部ファンに愛されています

要するに「Crankbrothersの黄金期XCカーボンステム」で、90mmの短め長さはアグレッシブなハンドルポジションや小柄ライダーにぴったり。
Schmolke TLOと並べて軽量ビルドに使ったら、バイク全体がめちゃくちゃ軽くなりそうですね!
状態も綺麗そうなので、組み込み待ちが楽しみです!
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1. International Shipping

   Air Freight: If the item status is not confirmed within two days after the arrival notice, any customer complaints cannot be addressed with the seller.

2. After Receiving the Product

Please confirm and inspect the product as soon as possible to ensure that the product specifications, quantity, accessories, and description are correct

If, unfortunately, there are any issues, you can refer to the following examples on how to report related product problems:
1. Example of missing product information
2. Example of product not matching provided information
3. Example of damaged product information

Important Notes: 1. If the seller is unwilling to ship overseas or is unaware that the product will be shipped overseas, the international shipping cost for returns or exchanges will need to be borne by the member. You may refer to the EMS e-Express fee inquiry from the post office. If it involves alcoholic beverages or items that affect flight safety, the post office cannot be used for shipment, and only DHL can be used to ship back to Japan.
2. During the product complaint handling period, please retain the complete outer packaging of the product (including the shipping label information), and refrain from attempting any repairs or altering the original condition. Any modifications may result in the inability to process the case.

3. After Inspecting the Product

After receiving and inspecting the item, if you have any questions, it is recommended to contact Letao within 2 hours. Here are some reminders:

1. Please do not unpack, use or repair the received item yourself, and be sure to keep the original packaging to facilitate subsequent handling of related matters, so as to avoid changes to the item that may cause the seller to be unwilling to process.

2. You can call customer service, and the customer service will leave a message for you as below. Please provide the following information:
"Hello, we will first help you establish a complaint case for Product ID: _______ .But we need you to 2-3 clear photos of the product issue, including photos of the product problem, product packaging, shipping details slip, and outer box. Send them to service@letao.my and inform us of your desired resolution (failing to provide this may result in an inability to process subsequent matters). After sending the email, notify us in the customer service message. We will confirm with the seller as soon as possible. and if there are any related questions, we will contact you through the customer service message. Thank you for your cooperation."

Please provide:
1. "Product ID"
2. Photo of the "Delivery Note" (if any)
3. Photos of the outer box (including inner and outer packaging)
4. Photos of the product (Please include relevant descriptions to help us confirm with the seller)

Important Notes:
1. Do not include foreign text or other products in the background of the image.
2. Please keep the complete product packaging (including the shipping label information), and refrain from repairing or altering the original condition on your own, as any changes may result in the case being unable to be processed.
3. Please provide the relevant information within 48 hours to avoid missing the golden hour for reflection and causing situations that cannot be handled.
4. Due to 99% of Japanese sellers being unwilling or unaware of shipping goods overseas, if a seller is willing to handle the issue, the goods must be sent back to Japan, and the international shipping costs incurred must be borne by the member. Letao will use postal EMS international express to send the goods back to Japan.
5. As the goods are purchased from overseas, it may take approximately one to two weeks to complete the relevant processing procedures when issues arise with the goods. Please be reminded that you can inquire about the approximate cost through the EMS service at the post office.

4. FAQ

1. Issue of Authenticity: If antique or branded goods are found to be counterfeit upon receipt, clear photos showing the differences between the genuine product and the imitation must be provided as evidence. If unable to provide relevant proof, assistance can be sought to find a third-party reputable organization for a premium authentication service .
2. Leaking Iron Teapot: If an antique iron teapot is leaking, please take clear photos of the leaking area and provide them.
3. Transport Damage: If the goods are damaged during international shipping (to the pickup point), you need to provide photos of the outer packaging of the parcel and clear photos of the damaged goods' outer packaging.

※ Note: Photos provided to sellers should not contain any foreign-related information.
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    Product name: Crankbrothers Cobalt 11
    Notes:
    Customer service hours:
    • Monday to Friday 10:00-18:00
    Customer service hotline:
    Customer Service Email: service@letao.my