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Description
QUARQ XX1 Eagle DZero DUB AXS Boost Power Meter (Spider Only) Regular priceThe QUARQ XX1 Eagle power meter Boost cranks are composed of the Eagle DUB power meter Boost spider for the XX1 Eagle crankarms with DUB axle. It serves all Eagle XX1 riders as an entry into the world of power measurement. You benefit from the DZero technology, which has been tried and tested for years and scores with such practical features as temperature compensation, automatic calibration and integrated cadence sensors. Performance data is measured
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.0 ★★★★★
Based on 401 reviews
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Product Reviews
★★★★★ 5
Rocks
Format: Paperback
Love it...lots of info for the rockhounder
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 23, 2025
★★★★★ 1
Don't recommend.
Format: Paperback, Format: Paperback
Not at all what I was expecting. It must have been self or independently published. Returned. I will definitely be scrutinizing my next book purchase on this subject to more stringently. Also, Not that I care but claiming to be "7 books in one" is a false claim. But I kind of figured that before I purchased it. Its just bad.
Big turn offs for me.
-No/poor editing.
-Page formatting makes my eyes bleed.
-The font tries too hard to be fun--especially for an instructional book.
-pages feel cheap.
-image quality is abysmal.
- none of the information I was looking for and lots of information I wasnt.
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Reviewed in the United States on May 22, 2025
★★★★★ 5
Fantastic from the gem city
Format: Kindle
This is great for the geology and art badges. The kids love it and it rocks from the gem city of erie!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 21, 2024
★★★★★ 2
Not helpful
Format: Paperback
This book is so basic it doesn't really help much in tips on identifying rocks and minerals. The photos are enlarged so much they are distorted and most photos are of the rocks cleaned and polished. That doesn't help with how to spot things in nature or where to look. I'm really disappointed. Also, Montana has a lot of cool rocks but all books ever speak of are sapphires and agates. I feel like I wasted my money. There are some helpful things but even as a beginner, most of the contents are known.
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Reviewed in the United States on November 19, 2025
★★★★★ 5
Great book
Format: Paperback
A lot of great information for beginners like me
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Reviewed in the United States on November 15, 2025
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