... tire studs 2. flat tyre studs 3.size:9-10,9-11,9-12,9-13,9-14all the specifications can be used in cars. ... )10 +/-0.15 mm,11mm,12mm,13mm,14mmHead Diameter(D)9+/-0.2 mmShaft Diameter (D1)2.3 +/- 0.15mm ... car for Motorcycle, ATV, Farm, Tractor: GRADECoHcDenRSHV30GRAIN SIZEJX0197.5-9.011.0-14.012.68-12.7850-901400-16001.2 ... 10-12.2050-901400-16001.6-2.0JX0259.0-11.010.2-11.212.77-12.8787-971380-14801.6-2. ...