When 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.
Box Two Cosine Chainring
Pay in 4 interest-free payments
Select Option
View AllBox Two Cosine Chainring / Black / 38T
Box Two Cosine Chainring / Black / 39T
Box Two Cosine Chainring / Black / 40T
Box Two Cosine Chainring / Black / 41T
Box Two Cosine Chainring / Black / 42T
Box Two Cosine Chainring / Black / 43T
Box Two Cosine Chainring / Black / 44T
Box Two Cosine Chainring / Black / 45T