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Box Two Cosine Chainring

Marsoni M251S
Sale price$56.95
Pay 4 payments of $14.24 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Box Two Cosine ChainringWhen you're hitting the sort of leg speeds modern day BMX tracks demand, you want the reassurance that your chainring will run true lap after lap. The Box Components Cosine 4 Bolt Chainring is made in the USA from durable 6061 aluminium with large square shaped cutouts around the perimeter to help save weight, 3 32" teeth with rounded tooth profile to reduce chain wear, laser etched BOX logos and a 4x104mm bolt pattern.
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  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

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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
4.8 ★★★★★
Based on 687 reviews
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PattyJoyce on Joe List
Omaha, US
★★★★★ 1
Very dangerous for chewers!!!
Color: Rubber Chew Toy, Size: Large
My dog was chewing/swallowing the hard rubber within seconds of having this "toy"!!! Not safe, sturdy, no play attraction; only desire was to consume!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
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Verified Purchase
Amazon Customer
West Palm Beach, US
★★★★★ 5
Get one!
Color: Rubber Chew Toy, Size: Large, Color: Rubber Chew Toy, Size: Large
This was my puppy’s fav toy for the longest time. Not too heavy and is the right amount of tough for a chewing teething puppy. Cute toy that’s easy to chew and safe for a teething puppy it’s not loud and lasts. Worth the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025
S
Verified Purchase
Stacie
Charlottesville, US
★★★★★ 5
Great for large chewers
Color: Rubber Chew Toy, Size: Large
Our dogs very favorite toy. I have bought several in all colors. Good quality and it lasted a while even with my strong dogs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
C
Verified Purchase
cassie
Carnegie, US
★★★★★ 5
Hard chewer pass!
Color: Rubber Chew Toy, Size: Large
Our dogs love these! They are hard chewers and am impressed they last a decent while. Good for the price!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
T
Verified Purchase
Today
Lexington, US
★★★★★ 5
Airedale tough!
Color: Rubber Chew Toy, Size: Large
We have two young Airedale Terriers and I thought this would be a good inside toy for them to tug. And I was right! Very happily so. I have to admit I was surprised when I first saw it; it seemed so small. But the thing stretches and springs back to shape. We’ve had it about 2 weeks now and it is constantly played with. Absolutely the best toy! Very interactive either alone (it rolls) or with us or they play together. I am surprised how tough it is with all the constant rough play. Highly recommend!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2022

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