MCS 40t BMX Chainring - Blue - 104mm 4-bolt - USA Made 58mm which will work with single

which will work with single speed thread-on freewheels that are 16t and larger

Fat BMX and Mountain use

It features a CNC-machined sidewall and reflective TNT graphics

This will only fit 28 tpi cranks like old Schwinn

MCS 40t BMX Chainring - Blue - 104mm 4-bolt - USA Made 58mm which will work with singleThe MCS 4 bolt chainring is an all American CNC machined product made of 6061 aluminum. It features an almost perfect round circumference, which will facilitate achieve an even tension of your chain. This chainring has a 104mm BCD, 4 bolt pattern and fits 3 32" chains. MCS chainrings are MADE IN THE USA! Size: 40tColor: Blue