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Fsa  |  SKU: 32700032029250  |  Barcode:

Fsa ebike WA133 Bosch 3/32 2.5mm offset chainring for boost 148mm - 15T

Sale price €19,90 Regular price €26,25 -24%
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Product details

Fsa WA133 ebike chainring for Bosch Boost 148mm systems

The Fsa WA133 chainring is a component specifically designed for Bosch ebikes with Boost 148mm architecture. Featuring a 3/32-inch chain pitch and a 2.5mm offset, this chainring ensures optimal chain alignment with the rear sprockets. The Boost system is the most advanced standard for modern electric bicycles, offering an increased rear axle width that improves stability and load distribution. The 15-tooth configuration provides an efficient gearing ratio for electric bicycles with Bosch mid-drive motors. With the lockring included in the package, the product is immediately ready for installation on any compatible system.

Technical specifications and compatibility

This chainring is made with wear-resistant materials, essential for e-bikes that require reliable components over time. The 2.5mm offset allows precise alignment with Boost cassettes, reducing lateral friction and improving power transmission efficiency. Compatibility with Bosch motors is total, regardless of the frame generation. The 3/32 pitch is the universal standard for modern bicycle chains, ensuring interchangeability with components of equivalent quality. The inclusion of the lockring simplifies maintenance and future replacement of the component.

Benefits and performance of the Boost 148mm chainring

Using a Boost-specific chainring prevents premature wear and maintains optimal performance over time. The WA133 geometry has been developed to minimize lateral chain movement, a common issue in incorrect installations. For those using a Bosch e-bike, this chainring ensures perfect synchronization between the motor and drivetrain, improving overall energy efficiency. Periodic chainring replacement is recommended for high-use electric bicycles, as it is a component subject to natural wear.

Technical features

  • Brand: Fsa (reliable components for ebikes).
  • Number of teeth: 15T for Boost 148mm drivetrain.
  • Chain pitch: standard 3/32 inches.
  • Offset: 2.5mm for precise alignment.
  • Compatibility: Bosch systems with Boost architecture.
  • Lockring: Included in the package.
  • Material: Wear-resistant steel.
  • Application: Electric bicycles and mountain ebikes.
  • Installation: Direct on 148mm Boost axles.
  • Maintenance: Replacement recommended every 2000-3000 km.

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Shipping and delivery times

Orders are usually shipped within 24-72 hours (1-3 days) from payment receipt. Some items may have longer shipping times (5-7 days). The specific shipping times are indicated on each product page.

FREE SHIPPING (bikes excluded) from

€ 79.00 Italy
€ 129.00 Europe, Principality of Monaco, and San Marino
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Shipping costs start from

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Shipping times and costs may vary depending on the delivery country, chosen service, and weight.

Shipping with InPost service

€ 5.00 Italy
€ 12.00 France, Benelux, Spain, Portugal, Poland

Bicycle shipping

Shipping costs for all bicycles are fixed as follows.

€ 39.00 Italy
€ 49.00 Europe
€ 69.00 Rest of the world

Non-EU shipping

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In-store pickup

All online-ordered items can be picked up at the All4cycling store in the province of Varese, Via Gianfranco Miglio 2, 21045 Gazzada Schianno (VA).

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Returns and refunds

  • You can request a return within 60 days of delivery.
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  • Use beyond what is necessary may result in a reduction of the refund based on the loss in value of the product.
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RETURN SHIPPING COSTS

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Germany & Austria Fixed cost €6.90 with DHL, deducted from the refund
Spain & France Fixed cost €9.90 with DHL, deducted from the refund
Switzerland & Liechtenstein Fixed cost €12.00 with Swiss Post, deducted from the refund
Other Countries Variable cost depending on the carrier selected, fully payable by the customer

The costs shown apply to returns made due to a change of mind. If the product is incorrect, damaged or not as described due to a cause attributable to All4cycling, the necessary return shipping costs will not be charged to the customer.