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 High vs low profile tyres, or big vs small standard rims-why do it?

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mADmAN
post Feb 6 2011, 07:16 PM

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QUOTE(mystvearn @ Feb 6 2011, 07:10 PM)
AFAIK the only reason you change to bigger rims are just for aesthetic reasons. Bigger rims are heavier, consume more petrol for you to run them, does not aid handling (if not F1 cars would have huge rims by now). When you balance the rims with low profile tyres, you increase cabin intrusion noise and poor ride quality. You may increase thread life as there is a bigger tyre thread on the wheel-but then rims may be easily be cracked because the low profile wheels have little power to absorb bumps to the rims.

So aside from looks-any benefits of going to bigger rims?
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in bold is wrong...

when u go bigger rims u have to go lower profile tires... this helps in handling as it reduces tire wall flex. dont bother comparing F1 cars with road cars... F1 cars the wheels are super wide so it really doesnt affect them that much.

also, most of the time when going bigger wheels u also go with wider than stock tires... this will improve handling by adding more surface area for better traction...

and for smart people...when going bigger wheels, they tend to upgrade to lightweight wheels. and most lightweight wheels are also stronger and more resilient towards the malaysian road condition. though those big lightweight wheels + tires combined may still be heavier than stock wheels+tires combibned, at least it helps to reduce rolling mass.




but for most people... its the looks..
mADmAN
post Feb 6 2011, 09:10 PM

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QUOTE(mystvearn @ Feb 6 2011, 07:18 PM)
I thought about that too until I read in a BMW forums somewhere where someone wanted to put huge rims to improve the X5 handling-and does not work. Unless you drive on non-toll intercity roads like EWHW you will not get the benefit of the handling

I am not so sure about the resilient part. I saw this some time ago. UK roads are similar to Malaysian roads:
http://www.bbc.co.uk/blogs/watchdog/2009/1...loy_wheels.html

Alot of places I read say that bigger rims improve handing. I think Mythbusters need to work on this.
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thats coz theyre just expecting too much... the improvement in handling is minimal... most people will not feel it since they drive everyday like is a sunday.... but for spirited driving and cornering it can definitely be felt...the most significant gain for improving handling is ALWAYS the suspension setup. everything else like bars, tires, etc etc are just additional support.

resiliency...i was comparing with stock rims... most stock rims are utter crap... and those from P1 n P2 are worse since theyre from JRD...

aftermarket wheels tend to be stronger due to their build process... the metal is just simply better.


mythbusters probably cant work on this... coz they probably know jack about aggressive/spirited/track driving... should get race car drivers to do it like Best Motoring etc....

besides... look at JGTC cars... they are ALL (or almost all) running bigger wheels and low profile tires.
mADmAN
post Feb 7 2011, 11:33 PM

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QUOTE(gagak_84 @ Feb 7 2011, 11:32 PM)
wah 70 series?
change bigger rim la bro..
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70 series for 13" is the stock size for iswara, wira, satria etc etc la...

 

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