299Technical dataTyresNot a ll tyres ava ila ble on the marketcurrently meet the structural requirem ents.We recommend that you consult aVauxhall Authorised Repairer concerningsuitab le tyre mak es.These ty res have und ergone special teststo establish their reliab ility , safety andspecific suitability for Vaux hall vehicles.Despite continuous ma rk et monitoring, weare unab le to assess these attributes forother tyres, ev en if they hav e been g ra ntedapprova l by the relevant authorities or insom e other form.Further information – see pa ge 211.Winter tyres 3Tyres of size 215/50 R 17, 225/45 R 18 and235/35 R 19 are not to be used as wintertyres.O nly the winter tyres sp ecified on p age 306may b e used on vehicles factory-fitted with235/35 R 19 tyres.For Vectra VXR, tyres of size 225/45 R 17 ona Vauxhall-approved alloy wheel withdesignation 7x17, ET39 as well as ty res ofsize 235/40 R 18 are permissible as wintertyres.If winter tyres are in use, the spare wheelmay still be fitted w ith a summ er ty re. Useof the spare w heel may a lter vehicleha ndling. Obtain a replacement for thefa ulty tyre as soon as possible, and hav ethe wheel balanced and fitted to thevehicle.Further inform ation – see page 216.Tyre ch ains 3Ty re c hains may be used on the frontwheels only.We rec om mend the use of fine-link tyrecha ins which am ount to max 10 mm on thetread a nd tyre inner wall with chain lockTy re chains are not perm itted on tyre sizes115/70 R 16, 215/50 R 17, 225/45 R 18,235/40 R 18 a nd 235/35 R 19.Further inform ation – see page 217.WheelsWheel bolt tightening torque: 110 N m.Spare wheel 3On vehicles with alloy w heels 3 the sparewheel may ha ve a steel rim .Depending on the model variant, the sp arewheel is designed to be an emergencywheel 3: Using a spare wheel may changethe vehicle’s ha nd ling. Repla ce defectivetyres a s quickly as possib le, bala nce wheeland fit to v ehicle.The spare wheel ma y be fitted w ith asmaller tyre1 ) and a sm aller rim than thewheels fitted to the vehicle: Using the sparewheel m ay change the v ehicle’ s handling.Tyre pressure in psi/bar 2)The specified ty re pressures are valid forcold ty res. The increased ty re pressureresulting from ex tensiv e d riv ing must notbe reduced. The tyre pressures specified onthe following pages ap ply to both summerand w inter tyres.Alway s inflate the spare wheel to the tyrepressure for full load - see tables onfollowing pages.Temporary spare wheel tyre pressure 3 –see tables on the following p ages.In v ehicles with tyre pressure monitoringsystem 3 there is an adapter in the v alvecap key . S crew a dapter to valve beforeattaching tyre pressure gauge –see page 213.Further inform ation – see p ages 211 to 217.1) Co untry-specific version: Th e spa re w heel isonly to be used as a tempo ra ry sp are wh eel.2) 1 ba r corresp on ds to 100 kPa / 14.5 p si.