The Road Ahead : December January 2008
Well aligned WITH JOHN EWING Wheel alignment is one of those impor tant but often- neglected regular maintenance items. In truth, it's more about measuring and setting the car's steering and suspension geometr y than 'aligning wheels'. Geometr y involves angles and there are some common angles that are checked and set during an alignment. The aim is to ensure maximum tyre contact with the road under actual driving conditions, such as cornering or travelling straight, accelerating or braking. It also ensures the car will 'track' straight rather than 'wander' or pull to one side. The angles that are set with the car stationar y make allowance for the natural geometr y changes that can be expected to occur when the car is in motion. The main angles commonly checked and where possible adjusted include camber, caster and toe. When looking at a wheel front on, camber is the 'lean' relative to ver tical of the wheel. Leaning in toward the car's centreline at the top is negative camber and out is positive. To understand caster, think of a bicycle front wheel. Viewed side-on, a ver tical line taken down through the centre of the wheel forms an angle with a line drawn down through the steering pivot suppor ts. The angle formed is the caster and is either positive (like the bike) or negative, depending on which way the axis is tilted. Toe refers to whether the wheels on an axle when viewed from above are closer together at the front (toe-in) or closer at the rear (toe-out). Incorrect alignment can result in excessive or uneven tyre wear, compromised handling, reduced directional stability, increased fuel use and reduced safety. Tyre wear resulting from misalignment is normally caused by incorrect toe or camber settings. If your steering wheel is off-centre, tyres are wearing unevenly, you have hit large potholes or kerbs, or your car 'pulls' to one side, it may need realignment. Alignment should also be reset after steering or suspension repairs and when tyres are renewed to ensure maximum tyre life. Some vehicles will only require a front wheel alignment, though most modern cars will need a four-wheel alignment. "Incorrect alignment can result in excessive or uneven tyre wear, compromised handling, reduced directional stability, increased fuel use and reduced safety." TORQUING POINT 50 DEC 07/JAN 08 *Fares are cruise only, per person, in AUD, in complete 4 berth and twin cabins based on l grade inside and E grade outside inclusive of all taxes charges. Valid for new Group bookings only, not combinable with any other offer. + g gThe on board credit is determined by the bonus package selected, it is non-refundable and non-redeemable for cash. It is only valid for passengers over the age of 13 years. The group offer is only available on selected voyages. P&O Cruises has set aside cabins which are available at these special group fares. Once these cabins are sold, fares may revert to a higher fare or the full fare. Conditions apply. To be read in conjunction with the current South Pacific fi and Queensland 2008-2009 brochure which passengers will be bound by Carnival plc trading as P&O Cruises ABN 23 107 998 443. 2TA 5580. Issued October 2007. BRCVL1712. Contact RACQ's Cruise Consultants on 1300 888 449 or visit racq.com ASK US ABOUT OUR OTHER MEMBER DISCOUNTED CRUISES! BRISBANE VILA LIFOU NOUMEA 4 berth inside from $1013* 4 berth outside from $1070* twin berth inside from $1587* twin berth outside from $1701* 20SEP08--N833--7NIGHTS New Caledonia, Loyalty Islands, Vanuatu MYSTERY ISLAND SYDNEY VILA WALA ISLE OF PINES 4 berth inside from $1371* 4 berth outside from $1449* twin berth inside from $2115* twin berth outside from $2271* 26MAR08--W811--10NIGHTS Vanuatu, New Caledonia SAVE 40% UP TO + RECEIVE UP TO $100 ON BOARD CREDIT+ If you'd like some technical advice, visit racq.com.au or call RACQ's Technical Advisor y Ser vice on 3666 9148 or 1800 623 456 (members in countr y areas).
October November 2007
February March 2008