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Cycling navigate_next Components navigate_next Rear derailleurs navigate_next Accessories navigate_next CeramicSpeed ALPHA PW derailleur pulleys for Shimano RX825/RX820
CeramicSpeed

CeramicSpeed ALPHA PW derailleur pulleys for Shimano RX825/RX820

-8%
239 € -8%
RRP 259 €
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From 20.10.2026 (Tuesday) Check availability
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By courier to your home Delivery by courier DPD Delivery by courier GLS
Delivery method on Wednesday 21.10.2026
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At pick-up points
Delivery method on Wednesday 21.10.2026
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Extended return option up to 100 days More info
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CeramicSpeed ALPHA PW pulley wheels are fully compatible with Shimano GRX RX825 / RX820 systems. They bring CeramicSpeed's most advanced durability technology in a compact, stock-size format. Designed for riders seeking a durable solution for both road and off-road use, ensuring smooth shifting and long life. The ALPHA pulleys combine a one-piece molded composite body with low-friction CeramicSpeed ceramic bearings and patented ADR technology. Developed, designed, and hand-built in Denmark.

  • Signature CeramicSpeed tooth profile
  • Purpose-shaped upper and lower pulleys for precise chain control, quiet operation, and consistent performance under load
  • Pulley-specific stainless steel, non-contact seals with patented ADR technology for superior bearing protection that eliminates the need for additional spacers
  • Prominent visible ADR logo on each pulley
  • Package includes: ALPHA pulley set, UFO TECH Drip 15 ml
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product ID 409512
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CeramicSpeed
Accessories CeramicSpeed
CeramicSpeed is a Danish brand that specializes in high-performance ceramic bearings and drive components for various industries including cycling, automotive and industrial applications. The brand is known for its innovative and cutting-edge technology, offering products that aim to improve the efficiency, durability, and overall performance of mechanical systems. CeramicSpeed was founded in 2004 by Jacob Csizmadia, a mechanical engineer with a passion for cycling. Frustrated by the limited options for high-quality bearings in the cycling industry, Csizmadia decided to develop a superior solution. He began experimenting with ceramic materials, which are known for their low friction and high wear resistance. After years of research and development, CeramicSpeed was born.
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