Vauxhall SIGNUM Owner's Manual

Also see for Signum: Quick reference guide

Contents

215Driving and operationThe legally permissible minimum treaddepth (1.6 mm) has been reached whenthe tread has worn down as far as one ofthe wear indicators (TWI1) ). A number ofwear indicators are spaced at equalintervals around the tyre within the tread.Their position is indicated by markings onthe tyre sidewall.General informationz The danger of aquaplaning is greater ifthe tyres are worn.z Tyres age, even if they are used only verylittle or not at all. A spare wheel whichhas not been used for six years should beused only in emergencies; drive slowlywhen using such tyres.z Never fit used tyres the previous historyand use of which you do not know.z So as not to impair brake cooling, useonly wheel trims approved for use onyour vehicle.Tyre designationsMeanings:e.g. 215/55 R 16 93 HSpeed code letters:1) TWI = Tread Wear Indicator.215 = Tyre width in mm55 = Cross-section ratio(tyre height to width) in %R = Belt type: Radial16 = Wheel diameter in inch93 = Load index e.g. 93 correspondsto 654 kgH = Speed code letterQ Up to 100 mph (160 km/h)S Up to 112 mph (180 km/h)T Up to 118 mph (190 km/h)H Up to 130 mph (210 km/h)V Up to 150 mph (240 km/h)W Up to 168 mph (270 km/h)