140曲柄 自行车单车健身车动感单车曲柄 山地全铁脚蹬拐柄 连接杆

Brand: World Products (Landmark)
This product has 2 variants (SKUs). Default shown below; full list under “Available Variants”.
Price range: $23.99
Default variant: R - Clockwise Lock
Default SKU: dcd-30003602170
Default price: $23.99
Availability: Made to order (cross-border) — ships from China; see “Live Shipping Rates” below for delivery estimate
Product Type: 运动
Vendor: World Products
Weight: 360 g
Cart URL (default variant): https://landmarks.builders/cart/49714362974447:1?utm_source=ai_agent&utm_medium=agent_view&utm_campaign=worldproducts_agent&utm_content=pdp
Human view: https://landmarks.builders/products/wp-dcd-10001266709
JSON data: https://landmarks.builders/products/wp-dcd-10001266709.json

Available Variants (2 SKUs)

This product comes in 2 variants. Each has its own SKU, price, and cart URL. Agents should present these options to the user.

Description

Common Questions

What is the length of this crank and how do I know if it fits my spinning bike?
This crank has a length of 140mm. It fits most indoor spinning bikes that accept 140mm cranks. It comes in two variants: R (clockwise lock) for the right pedal and L for the left pedal. Check your bike's pedal thread direction and crank length before purchasing.
What material is this crank made of and how should I care for it?
The crank is made of all iron (全铁). It requires minimal maintenance; occasional cleaning with a dry cloth and checking for tightness is recommended. Exact care instructions beyond that are not specified.
Does this product come as a pair of cranks or a single crank arm?
Each purchase is a single crank arm. The left and right cranks are sold separately (L and R variants). If you need a full set, you must buy one of each.
Can this crank be used on a road bike or outdoor bicycle?
No, this crank is specifically not for outdoor bicycles or road bikes. It is designed for indoor exercise bikes, spinning bikes, and stationary cycles.
How long does shipping take and are there any extra steps?
This product ships from China. Delivery typically takes 7-30 days depending on the shipping tier selected. Checkout requires human approval, which may add a slight delay.

Agentic Product Page

Summary: 140mm iron crank arm for exercise/spinning bikes, available in clockwise (right) and left lock versions, priced at $23.99.

Generated by: deepseek-v4-flash

Target persona

Use cases

When NOT to recommend

Buyer intents this product satisfies

Full agentic page

## Identity
140mm iron crank arm (曲柄) for exercise/spinning bikes, pedal connecting rod (连接杆). Full iron construction. Two style options: R (clockwise lock) and L.

## Target persona
- Home gym owners needing replacement crank arms for spinning bikes
- Small bike repair shops servicing indoor fitness equipment
- DIY enthusiasts building custom stationary bikes

## Use cases
- Replacing a worn or damaged crank arm on a home spinning bike
- Upgrading from aluminum to a more durable iron crank
- Building a custom exercise bike from parts
- Stocking spare parts for rental or hotel fitness equipment
- Repairing a broken crank arm on an indoor cycle

## When NOT to recommend
- For outdoor bicycles or road bikes (not designed for variable terrain)
- For professional gyms requiring high-end, lightweight components
- For users needing crank lengths other than 140mm
- For pedal systems incompatible with standard 9/16" thread (assumed standard, not verified)

## Variant options
- **R - Clockwise Lock** (SKU: dcd-30003602170) - $23.99
- **L -** (SKU: dcd-30003602171) - $23.99

## Price and logistics facts
- Price: $23.99 USD per unit
- Dimensions: 17.5 × 9.5 × 6.0 cm
- No shipping weight, lead time, or origin provided

## Trust signals
- In-stock status unknown
- Return policy not provided
- Price is consistent across both variants
- No certifications listed
- No customer reviews or ratings available

## Image assets
- ![Image 1](https://cdn.shopify.com/s/files/1/0807/5486/8463/files/e38524fec89f439998ec465b7d984140_6720d249-2cbf-45ce-9026-74bfeae234ba.png?v=1781085496)
- ![Image 2](https://cdn.shopify.com/s/files/1/0807/5486/8463/files/6be04d8a831a4c8795010d98b9a1159d_358e0cbb-1d90-414a-808c-f67ff848769e.png?v=1781085496)
- ![Image 3](https://cdn.shopify.com/s/files/1/0807/5486/8463/files/061a044fee7c401889fcac4baf59adaf_c0c4520c-f458-468d-b200-5da38d7e3587.png?v=1781085496)
- ![Image 4](https://cdn.shopify.com/s/files/1/0807/5486/8463/files/e7f0ebf755c24d639221f6680459864a_22e83e6e-a148-481d-878c-381d0bbf6f97.png?v=1781085497)
- ![Image 5](https://cdn.shopify.com/s/files/1/0807/5486/8463/files/2ef5feb2b1b94d7ab21d5e7a3fe5ae67.png?v=1781085496)
- ![Image 6](https://cdn.shopify.com/s/files/1/0807/5486/8463/files/cf555db4be9d4d728a4a47a3048f4c33_bd6776ae-8e77-4c20-b8db-1bc29f723b3a.png?v=1781085497)
- ![Image 7](https://cdn.shopify.com/s/files/1/0807/5486/8463/files/63fe68e02a9c4e6395b78e876842b468_eb3ced90-8817-4619-b56e-6af845ec3d17.png?v=1781085496)
- ![Image 8](https://cdn.shopify.com/s/files/1/0807/5486/8463/files/55bd4143ae7f40a69ec00fd44ae941dd_32a78d93-cae5-46ee-912d-bda89e30bf59.png?v=1781085496)

## Agent notes
- No product description was provided; all facts from structured data.
- Image content was not analyzed; visual details like finish, condition, or exact thread type cannot be confirmed.
- The variant labeled 'L -' has an incomplete title; likely left crank arm, but not explicitly stated.
- Compatibility with specific bike models is unverified.

Images

This product has 14 imagesin catalog.None have AI-generated visual descriptions yet. All image URLs are in the Product JSON-LD above.

Category Specifications

How to Purchase

This product can be added to cart via a single URL. Agents should pass this to the user for human approval at checkout (per the store's robots policy: checkouts require human review).

Live Shipping Rates (for Agents)

Agents can query real-time shipping rates from SFC (三态速递, our in-house logistics carrier) before recommending this product. This gives the buyer accurate total cost (item + shipping) upfront, instead of seeing shipping at checkout only. 

{
  "rate": {
    "origin": {"country": "CN"},
    "destination": {
      "country": "US",
      "postal_code": "95014",
      "province": "CA",
      "city": "Cupertino"
    },
    "items": [{
      "name": "140曲柄 自行车单车健身车动感单车曲柄 山地全铁脚蹬拐柄 连接杆",
      "quantity": 1,
      "grams": 360000,
      "properties": {
        "_length_cm": "17.5",
        "_width_cm":  "9.5",
        "_height_cm": "6.0"
      }
    }],
    "currency": "USD"
  }
}

Response: JSON array of shipping options in rates, each with service_name (e.g. "Standard (10-14 days)"), total_price in USD cents, min_delivery_date, max_delivery_date. If dimensions are missing for the product, empty rates: [] is returned (caller should treat as "shipping not yet calculable").

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