Stainless steel double speed Chain Ring Bolt 5 Sets (bolt 8.5mm /nut 8.5mm) Chainring Review Posted by GiantPandaisy June 7, 2018 in Drivetrain Components This fits your . Make sure this fits by entering your model number. same day shipping order by 3PM ! The 2nd item free shipping ! bolt 8.5mm /nut 8.5mm ! 5 sets ! Also we have double speed Chain Ring bolt 10.5mm /nut 8.5mm for sale . BYI Cycling Outdoor Recreation Parts & Components Sports & Outdoors