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25 replies to this topic | 46 praises

#1

Posted 15 July 2014 - 02:25 PM

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hey guys, i'm planning to change the rims of my ride probably at the start of next year. currently the rims are quite heavy. requires a fair amount of strength to lift. my question is, are lighter rims good for fc etc or are there other factors to consider? driving a forte here.



#2

Posted 17 July 2014 - 11:08 PM

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Lighter rims will always be better for FC. Every time your engine turns the crank, it has less weight to push.



#3

Posted 18 July 2014 - 12:44 AM

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Lighter is always better, PROVIDED all else is equal.

 

If you switch to ligher rims, but rims are cheap rims, can warp or crack over pothole.

 

If rims lighter, but are bigger, e.g. you upsize from 16 to 17, more rotational inertia.

 

If rims lighter, but you put heavier tyre, also more rotational inertia, and the further the weight is from the center, the more impact. Unfortunately, not much data publish on tyre weights.


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#4

Posted 18 July 2014 - 09:36 AM

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Lighter is always better, PROVIDED all else is equal.

 

If you switch to ligher rims, but rims are cheap rims, can warp or crack over pothole.

 

If rims lighter, but are bigger, e.g. you upsize from 16 to 17, more rotational inertia.

 

If rims lighter, but you put heavier tyre, also more rotational inertia, and the further the weight is from the center, the more impact. Unfortunately, not much data publish on tyre weights.

[thumbsup]  is lighter  better is Subjective

and how one can provide and sure all else is equal [confused]

OEM Original specification of wheel ,

BMW 3 (E90) stock 16" BMW allows this car upsize to 19" staggered

I wish BMW engineers could explain is Light weight better.



#5

Posted 18 July 2014 - 10:15 AM

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Lighter is good if your pocket is deep enough.

Hit a kerb hard enough and you'll probably end up replacing the rim, maybe by sets of 4.


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#6

Posted 18 July 2014 - 10:50 AM

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Rims are for looking good and picking up girls only. If the salesman sells u on looking at improve FC and picking up speed, he is pulling a fast one on you.   



#7

Posted 18 July 2014 - 11:07 AM

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Steel rims the best!



#8

Posted 18 July 2014 - 11:16 AM

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slight heavier rims is fine for me as when cornering, it has better stability if u go with a good tyres. no doubt lighter rims has better Fc but durability of the rims is a concern to me. imho


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#9

Posted 18 July 2014 - 12:50 PM

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to me Safety always come first

light or heavy rim is ok to me , off course not those 2 to 3 time the original weight. 

Light is good when quality must be good for the strength .

but still rim is not for impact.

The best way to cut FC is cut the LOAD of the car and driving habit and plan your route and avoid heavy traffic

NO FC when you don't drive



#10

Posted 18 July 2014 - 01:54 PM

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Lighter is good if your pocket is deep enough.

Hit a kerb hard enough and you'll probably end up replacing the rim, maybe by sets of 4.

 

very true. My BIL had Kyowa 17" on 215/45. Hit kerb, 1 rim crack.

But because don't have the same model, he replaced all 4. This time hes on 215/50-17.


Steel rims the best!

 

haha, that's what one IN fw told me at a tyre shop. He really meant it & said back in India, so many potholes. Sport rim crack easily.

 

I didn't see him again when I was round the corner a month later  haha...


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#11

Posted 18 July 2014 - 02:14 PM

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fried cuttle fish?  [:p]

 

I have been lifting my 15" steel rim (full spare wheel+tyre), not that heavy as many always say. And I am not very strong man type; not those gym guy.

 

 

 

haha, that's what one IN fw told me at a tyre shop. He really meant it & said back in India, so many potholes. Sport rim crack easily.

 

I didn't see him again when I was round the corner a month later  haha...

 


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#12

Posted 18 July 2014 - 03:31 PM

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very true. My BIL had Kyowa 17" on 215/45. Hit kerb, 1 rim crack.

But because don't have the same model, he replaced all 4. This time hes on 215/50-17.


 

haha, that's what one IN fw told me at a tyre shop. He really meant it & said back in India, so many potholes. Sport rim crack easily.

 

I didn't see him again when I was round the corner a month later  haha...

 

During my getz day's, one of the $300 enkei rim was cracked.

What to do ? They don't sell one piece.

End up buying $100 taiwan rim, in sets of 4.

Sold away the remaining 3 enkei to scrap dealer for $20 each.

 

Recently, found 1 rim crack on a fren's i30. Again same predicament.

You can't buy 1. It's either 2 or 4.

 

Now I have steel rim on my van, who cares?

It hit kerb, tyre explode, but rim still usable. [laugh]


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#13

Posted 19 July 2014 - 10:19 AM

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During my getz day's, one of the $300 enkei rim was cracked.

What to do ? They don't sell one piece.

End up buying $100 taiwan rim, in sets of 4.

Sold away the remaining 3 enkei to scrap dealer for $20 each.

 

Recently, found 1 rim crack on a fren's i30. Again same predicament.

You can't buy 1. It's either 2 or 4.

 

Now I have steel rim on my van, who cares?

It hit kerb, tyre explode, but rim still usable. [laugh]

steel against Alloy (low grade) against Alloy (high grade)

weight : heavy / light / light (weight of the rim subject to cost you paid)

cost : $ / $$ / $$$

strength : Good / Poor /Good

material : Softx2 / Hard / Soft ( harder material easier to crack)

Looks : ugly / pretty / pretty

status : cheap / class / high class

Pocket : poor / very poor / rich (just kidding only)

 

 

 



#14

Posted 20 July 2014 - 09:49 AM

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During my getz day's, one of the $300 enkei rim was cracked.
What to do ? They don't sell one piece.
End up buying $100 taiwan rim, in sets of 4.
Sold away the remaining 3 enkei to scrap dealer for $20 each.
 
Recently, found 1 rim crack on a fren's i30. Again same predicament.
You can't buy 1. It's either 2 or 4.
 
Now I have steel rim on my van, who cares?
It hit kerb, tyre explode, but rim still usable. [laugh]


Buy those highend forge rim and they do allow you to replace single rim. Brand such as bbs, prodrive, advan etc..

#15

Posted 23 March 2015 - 11:05 AM

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Sorry to dig up old post, as I can't post a new thread yet.

 

I'm considering changing my stock aluminium 17" (on 235/45/17) to BBS rims (either 235/45/17 or 235/40/18). The weights of the stock and BBS 17"s are about the same. Just wanted to check if there are any advantages to upsize to 18" as it looks like it's mostly for asthetics. I'm assuming braking grip would likely be similar given the same tyre width.

 

In fact, it looks like ride comfort might suffer if I upsize. FC might also go down since the 18"s are heavier. Hope to hear from more learned experts :)



#16

Posted 23 March 2015 - 11:11 AM

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unless you go for "real" forged wheel that is

 

7.5-8kg+ for 18"

9kg+ for 19"

10kg+ for 20"

 

hey guys, i'm planning to change the rims of my ride probably at the start of next year. currently the rims are quite heavy. requires a fair amount of strength to lift. my question is, are lighter rims good for fc etc or are there other factors to consider? driving a forte here.

 


Edited by Wt_know, 23 March 2015 - 11:11 AM.


#17

Posted 23 March 2015 - 11:51 AM

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Sorry to dig up old post, as I can't post a new thread yet.

 

I'm considering changing my stock aluminium 17" (on 235/45/17) to BBS rims (either 235/45/17 or 235/40/18). The weights of the stock and BBS 17"s are about the same. Just wanted to check if there are any advantages to upsize to 18" as it looks like it's mostly for asthetics. I'm assuming braking grip would likely be similar given the same tyre width.

 

In fact, it looks like ride comfort might suffer if I upsize. FC might also go down since the 18"s are heavier. Hope to hear from more learned experts :)

 

 

what car?



#18

Posted 23 March 2015 - 12:30 PM

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You have answered your own questions correctly!

Who cares about all the rest when it looks good? Fix oversized brakes too otherwise looks funny ....

#19

Posted 23 March 2015 - 07:37 PM

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You have answered your own questions correctly!

Who cares about all the rest when it looks good? Fix oversized brakes too otherwise looks funny ....

 

Ya. I always see cars with huge rims and tiny brakes or drum brakes at the rear. Looks weird. Cuz its so empty. Especially if the rim design is those kind with lots of gaps in between. 



#20

Posted 23 March 2015 - 07:58 PM

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yeah ... with bigger rim ... you need to fill up the lobang ... hehe *not my car ... picture leech from internet ... lol

 

Ya. I always see cars with huge rims and tiny brakes or drum brakes at the rear. Looks weird. Cuz its so empty. Especially if the rim design is those kind with lots of gaps in between. 

 

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