Box Two Cosine Chainring

Marsoni

M251S

$56.95

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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Your Box Two Cosine Chainring orders ship within 1-2 business days.

Delivery Options:

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]
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Yes, this is a smaller ball launcher … It is for her SHORT Game! Love it AND the squeaky baseball that came with it is A-HIT!! Our black golden doodle, Josie, carried that around for hours … batting it around, jumping on it, resting with it right-next-to-her. For your pup’s LONG game, purchase the longer launcher. GAME-on!

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Reviewed in the United States on May 23, 2026

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Colleen P. Sisco

Waukegan, US

★★★★★ 5

Works great with tennis balls

I have a pretty large yard, and this thrower is great for my little Jack Russel puppy. It even picks up ball without having to touch all the spit.

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Reviewed in the United States on April 14, 2026

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Michael Wheeler

Whiting, US

★★★★★ 5

Its awesome

Perfect 👌

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Reviewed in the United States on April 7, 2026

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Michele Z.

Port Orchard, US

★★★★★ 1

Thing is absolutely garbage. Ball didn’t make it back once! Broke in half

Junk and they don’t follow through with the shipping that they claim. Said between 7am and 11am. Don’t post it if ya can’t fulfill your shipping expectations

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Reviewed in the United States on May 21, 2026