SKU: 26918138958

Shimano RD-R9250 Dura-Ace Di2 12-Speed Rear Derailleur

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Description

Shimano RD-R9250 Dura-Ace Di2 12-Speed Rear DerailleurThe DURA ACE RD R9250 integrates the system charging port and a wireless connectivity unit all while delivering super fast, precise shifting worth of any podium. A single cage length that is compatible with 28 34T low sprockets brings new versatility to the world's best road component group. FEATURES Fastest ever rear shifting, 58% faster than RD R9150 Compact design includes an integrated wireless unit, charger, and switch LED status indicator,

The DURA-ACE RD-R9250 integrates the system charging port and a wireless connectivity unit all while delivering super fast, precise shifting worth of any podium. A single cage length that is compatible with 28-34T low sprockets brings new versatility to the world's best road component group.

FEATURES

  • Fastest ever rear shifting, 58% faster than RD-R9150
  • Compact design includes an integrated wireless unit, charger, and switch
  • LED status indicator, Battery indicator, Pairing Adjust mode, etc.
  • Wider range capacity
  • CFRP rear derailleur plate

SPECIFICATIONS
Cage Length: One-Spec
Total Capacity: 37T
Max Front Difference: 16
Colour: Series Colour
Average Weight: 215g
Mount: Direct attachment (conventional)
Number Of Pulley Teeth: 11
Max Low Sprocket: 34T
Min Low Sprocket: 28T 
Rear Speeds: 12

SKUs
Product Code: IRDR9250E
Model No: RD-R9250

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SKU: 26918138958

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4.0 ★★★★★
Based on 19 reviews
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Product Reviews
K
Verified Purchase
K. Ryan Kane
Port Orchard, US
★★★★★ 5
This is a great book to begin your study on all the groups ...
Format: Paperback
This book isn't just about pyramids. It talks a lot about all the different groups and waves of people who traveled to the American continent, mostly the Latin American areas. There is so much information contained therein that I intend to read this book again. This is a great book to begin your study on all the groups who traveled to Latin America.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2018
R
Verified Purchase
Robert R.
Louisville, US
★★★★★ 5
Good read
Format: Kindle
Very well written, personable, and good research. Several references were made about Noah and Moses as if they were valid historical people and their related events, which most scholars agree were 'lifted' from Sumerian and Akkadian legends. Doesn't give much credit to Zechariah Sitchin, never even mentions Enlil and Enki - it's like talking about Kennedy's last trip to Dallas without mentioning the Grassy Knoll.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 28, 2015
A
Verified Purchase
Amazon Customer
Los Angeles, US
★★★★★ 3
Interesting
Format: Hardcover
Great perspective and well-presented discussion. Beneficial for contemplation and developing hypotheses or questioning documented science to further discern evidence or seek new explanations. Recommend reading through a lens of correlation does not equal causation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
K
Verified Purchase
Karla Crum
Cuba, US
★★★★★ 5
Professional and fun to read
Format: Paperback
The book is written by a professional who provides ideas and reasons about possibilities without being dogmatic.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2022
M
Verified Purchase
Mark McDonough
Boise, US
★★★★★ 4
Absolutely Not Nonsense
Format: Hardcover
At first glance, this book might be mistaken for "Chariots of the Gods" hokum -- it's about pyramids, it suggest prehistoric connections between widely scattered civilizations, and it has an entire chapter on planetary catastrophes. However, this is a very serious effort. Granted, it raises a lot more questions than it answers, and can be a little monotonous in spots. But as a former geology major, I didn't spot any pseudo-science (which is not surprising, given that the primary author has a Ph.D. in Geology from Yale) and I found much food for thought. Sure, if it turns out that the whole theory of cultural diffusion is wrong, (similarities in disparate civilizations are due to migration and interconnection rather than parallel developoment) this book will be little more than an amusing footnote in the history of science. But then, plate tectonics was once a crackpot theory. This is a serious book that deserves to be read.
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Reviewed in the United States on December 6, 2003

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