TYRE Security Bolt DIE CAST 2.50 - Heavy-duty die cast aluminum. - Molded Long rubber flap to protect against abrasion of inner tube. - Ribbed alloy contact surface locks tire securely to rim. - Recommended for use on all off-road machines and any application using low tyre pressures. - STUD & NUT M8, High Tensil 8.8 steel. - Best selling Security Bolts. Cross reference numbers ONLY. Table of Correct Rim Width. WM1 = 1.60 - Front Tyres WM2 = 1.85 - Thin Rear WM3 = 2.15 - Medium/Fat Rear TyresWM4 = Big Rears Part No. 11-012.EACH FIR [FACTORY IMAGE RACING] Majority of our listings are for a direct replacement for your original part. Our parts are made of quality and are designed to meet or exceed the original OEM Standards. Our products are often a cost effective alternative to genuine OEM Parts. Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.