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Box Two Cosine Chainring
Box Two Cosine Chainring
Box Two Cosine Chainring
Box Two Cosine Chainring
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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.
Easy Shipping

Quick Dispatch:

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

Order Tracking:

You'll receive a tracking link by email once your Box Two Cosine Chainring ships.

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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
4.2 ★★★★★
Based on 496 reviews
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Product Reviews
G
Verified Purchase
Gabriel
Lexington, US
★★★★★ 3
Roller brush isn’t exact fit
Color: X10 Parts-14Pcs
Roller isn’t a perfect fit and makes a loud noise when in use. Other accessories work well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026
K
Verified Purchase
Keith
Louisville, US
★★★★★ 5
Good mix of accessories for my X10
Color: X10 Parts-14Pcs
Items all worked well with my X10
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
A
Verified Purchase
Amazon Customer
Chelsea, US
★★★★★ 5
Worked Perfectly
Color: X10 Parts-14Pcs
I didn’t realize the maintenance I had to do with robot vacuums but this was the best price for parts needed! Everything fit as it should.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2025
T
Verified Purchase
Tracey
Bozeman, US
★★★★★ 4
The bracket that covers the roller brush is not part of the kit.
Color: X10 Parts-14Pcs
I guess if I had paid more attention, I would have noticed no bracket in the kit. My fault. I had to order a different roller brush that had the bracket. All good items, just more that I need at the moment. It would be nice to have the bracket included.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 27, 2024
J
Verified Purchase
JVAN
Omaha, US
★★★★★ 5
Amazing service
Amazing service. Very easy to use. Will purchase again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026

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