What is Camber?
The camber is the angle, measured in degrees, between the center line of the wheel and the perpendicular to the ground, looking from the front.
What is Negative Camber ?
Negative camber is when the top of the wheel leans inwards. Extreme Negative Cambers are very common on racing cars in the 60's...
.. at which time I was still running naked racing old bicycle rims with cousins as depicted by Lat in "the Kampong Boy" .
Why Negative Camber?
According to my old school book negative camber improves grip for the outside tire on which most of the loads are concentrated when cornering.
The tyre tends to roll on itself while cornering. If non-negative camber, the inside edge of the contact patch would begin to lift off and reduce the area of the contact patch.
Negative camber reduces this effect and optimising the contact patch area hence the grip.
However, negative camber is no good for straight-line performance because the maximum traction is achieved if the tyre tread is flat on the road i.e when the camber angle is zero. Negative Camber also makes inside tyre tread wear out faster hence tyres are forced to 'retire' earlier than expected...
I love Negative Camber because most of the roads I drive on need it....
How do I know myPeugeot 308 has Negative Camber?
By looking at the tyres when they are almost 'retired'...
At 40-thousand km, I thought the tyres on myPeugeot 308 would last for at least another 10-thousand km because the remaining outside tread was still 2mm above wear indicator.
Note: average tread consumption is around 1mm/5000km.
However, when the tyres were taken out for routine DIY inspection, to my surprise the inside tread on all four tyres had gone. Botak licin you....!!!
So, these are the inferences/evidence that Peugeot 308 has Negative Cambers on all wheels!. Whereas myPeugeot 206 and myPeugeot 405s have no camber angle at all on rear wheels hence the tyres on them worn out evenly ever since.
BTW, I've already replaced all the tyres on myPeugeot 308 at 40-thousand km.
The camber is the angle, measured in degrees, between the center line of the wheel and the perpendicular to the ground, looking from the front.
What is Negative Camber ?
Negative camber is when the top of the wheel leans inwards. Extreme Negative Cambers are very common on racing cars in the 60's...
.. at which time I was still running naked racing old bicycle rims with cousins as depicted by Lat in "the Kampong Boy" .Why Negative Camber?
According to my old school book negative camber improves grip for the outside tire on which most of the loads are concentrated when cornering.
The tyre tends to roll on itself while cornering. If non-negative camber, the inside edge of the contact patch would begin to lift off and reduce the area of the contact patch.
Negative camber reduces this effect and optimising the contact patch area hence the grip.
However, negative camber is no good for straight-line performance because the maximum traction is achieved if the tyre tread is flat on the road i.e when the camber angle is zero. Negative Camber also makes inside tyre tread wear out faster hence tyres are forced to 'retire' earlier than expected...I love Negative Camber because most of the roads I drive on need it....
How do I know myPeugeot 308 has Negative Camber?
By looking at the tyres when they are almost 'retired'...
CSC3 at 40-thousand km vs unused spare tyre.
At 40-thousand km, I thought the tyres on myPeugeot 308 would last for at least another 10-thousand km because the remaining outside tread was still 2mm above wear indicator.
Note: average tread consumption is around 1mm/5000km.
However, when the tyres were taken out for routine DIY inspection, to my surprise the inside tread on all four tyres had gone. Botak licin you....!!!
So, these are the inferences/evidence that Peugeot 308 has Negative Cambers on all wheels!. Whereas myPeugeot 206 and myPeugeot 405s have no camber angle at all on rear wheels hence the tyres on them worn out evenly ever since.BTW, I've already replaced all the tyres on myPeugeot 308 at 40-thousand km.
4 comments:
wowowowowww!!! baru je kita discussed smlm pasal bendai nie uncle dah post dlm blog. terbaik uncle!
Ya... ya, terus tulis sebelum terlupa...
Salam,
206 and 405 did have negative rear camber...cuba tgk dr belakang....and older car may have bigger kangkang due to wear and tear to the rear suspension bearing...
Zulfa ahmad
Zulfa,
My 206 and the old 405 camber nampak vertical [no kangkang]. Tyres pun makan cantik jer [very evenly]. Cuma bila jacked up nampak macam positive camber pulak, bukan negative.Will double check again...
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