KMC 415H BMX Chain - 1/2 x 3/16 / Extra Wide - Black 28.6mm (1-1/8") It is an adjustable bottom

It is an adjustable bottom bracket that allows you to adjust the spindle from side to side before locking into place to attain a more perfect chain line

This bottom bracket is designed to be used with old school 1 piece cranks that are 24 tpi and frames that have a classic American bottom bracket shell

Extras: Eyelets

Steerer Length: 172mm

S&M Slam Bars are constructed of 4130 chromoly

KMC 415H BMX Chain - 1/2 x 3/16 / Extra Wide - Black 28.6mm (1-1/8") It is an adjustable bottomThe KMC 415H chain is 1 2" x 3 16" x 98L. A master link is included. This is an EXTRA HEAVY DUTY chain with bushings and thicker plates than regular chains. This chain is designed to be used on 3 16" rings and cogs only. If you do not know what a 3 16" chain is, do not buy this; it won't fit your bike. Color: Black