Best in 7 days
Pay in installments of $32.25 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jun 29 - Jul 4
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Vortex Alloy Rear Sprocket 520-45T Black 39-0193-45AZKVortex Alloy Rear Sprocket 520 45T Black 39 0193 45AZK Lightweight Aluminum Racing Sprocket 100% CNC manufactured in the USA Specially formulated alloy per Vortex specifications Unique tooth design increases sprocket longevity Vortex patented sprocket design is unlike any other sprocket
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
Discover Niche Categories That Outsell
Top-Converting Item to Boost Your Average Order
Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.6 ★★★★★
Based on 2319 reviews
Sort
Product Reviews
★★★★★ 5
Great buy!!
Format: Hardcover
Fantastic book! For adults and children!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 19, 2026
★★★★★ 5
Great book for learning about Earth
Format: Hardcover
My son was asking different questions about the Earth and this book was the perfect surprise for him. He’s only 5 so he loved all the different interactive features on every page. We read it together and it was just the right amount of information for him to understand. 100% recommend for curious little minds!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 10, 2025
★★★★★ 5
Worth it!
Format: Hardcover
My child loves this book!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 15, 2025
★★★★★ 5
Great Earth Science Resource
Format: Hardcover
We purchased this book to go along with our homeschooling Earth science curriculum. This book did not disappoint! Such engaging pop ups that really interested my kiddos. I’m teaching age ranges 7-12 and all of them enjoyed this book. I think the pop ups are something different so it grabbed their attention! I would recommend this book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 30, 2024
★★★★★ 4
Fun Interactive Book
Format: Hardcover
This book is so fun to flip through. There's something interactive on every page. But the text isn't super engaging.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2024
