Long chainring bolts VS. Short chainring bolts, or why use long and short together? Long chainring bolts are primarily used for thicker gears and spiders, however the short chainring bolts are mostly found on complete bikes using a thinner spider and chainring.When you use the long 8mm fronts and backs of the chainring bolts, … Continue reading Profile’s Tech Tip #27: What goes Around? Best chainring bolts for Profile Spider and Ring Combo.