Profile Flush Crank Spindle Bolts (Bitchin' Bolts) - 3/8x24tpi 37t 50 - 4-1/4" (ISO 406mm)

50 - 4-1/4" (ISO 406mm) inner tube with a standard Schrader valve

this seat is lightly padded with a durable canvas cover

They attach to the bike with no tolls needed

This item is made in the USA

the Williams bars are Nathan Williams’ signature handlebars and feature all his preferred geometry

Profile Flush Crank Spindle Bolts (Bitchin' Bolts) - 3/8x24tpi 37t 50 - 4-1/4" (ISO 406mm)These genuine Profile spindle bolts are 3 8" x 24tpi, which is the threads used on the Profile solid spindle and many other 48 spline spindles. Includes two (2) crank bolts and (2) flush aluminum washers. Be sure to measure your old bolts before you order. Color: Black