The club has a wide range of drivers and cars and welcomes all interested people to join our MotorSport NZ affiliated club. We run a variety of events and have roles for drivers, event organisers, scrutineers, timing officials, marshals and spectators.
The culture of the club is relaxed and friendly and we encourage new members.
Tyres fitting on wheel rims
/There seems to be an increasing trend for competitors to arrive at an event with incompatible tyre / wheel-rim combinations. Schedule A doesn’t cover this in any specific detail and perhaps it is sometimes difficult to determine if a car should be allowed to run in a certain configuration. The picture to the right is probably a ‘no-brainer’ and shouldn’t be accepted. Some other examples might not be so clear cut though so how would you determine if a tyre / wheel combination was acceptable ?
Tyre manufacturers design tyres to be used within a small range of rim sizes. As a general rule the sidewall of the tyre should be close to a 90 degree tangent to the rim bead for safe operation and optimum performance. There is a good table available on the LVVTA website showing recommended tyre to rim size data and if you suspect this may be a problem at an event you are officiating at it might be worthwhile printing a copy out for your reference. There are a number of other websites also that provide this advisory data. You could consider most of this to be industry best practise and a useful guideline when checking at an event.
Sometimes, if it just doesn't look right, then perhaps it’s not.