Goody

Changed to 18" forged monoblock (Japan made british black) onto my new 8 about 2 weeks ago. Found on last Sun during rim washing that it had a dent on the rim-round-edge. I didn't remember I hit any big objects / stones on the road or kissed the kurb. There wasn't any scratches on the rim surface except the dent mark on the rim-round-edge.

What would be the likely cause?

Any repair that can be done? Recommanded shop(s)? Indicate price?

May be it was my mistake that I didn't check all the rims condition at the tyre shop during installation as it was rather dark in the early evening.

Is it possible for them to damage the rim by their tyre-mounting machine when they mount the new tyre onto it (as I remembered they changed the tyre once on a rim due to wrong direction)?

Hope to hear your experience / comments / advices.

Cheers.

Emperor

For a dent to appear on a forged rim; most probably due to parking. Its quite unlikely the mechanics will dent a forged rim; unless they want to do it intentionally.

How deep is it?

morganoh

Yes the rim can be damage by the machine when they are installing the tire on the rim.
That happen to me once, I had a small little dent around 0.23 cm deep , 0.1cm wide, 1 cm long on the rim while changing a new set of rims and tires.

but the shop owner is a close family friend so he change a new rim for me.

I do not think that the tyre shop will change for u cos they would have problem selling the dented rims (not unless they sell it at a much cheaper price)

Emperor

Wow! you even measured the dimensions so accurately. You mean they dent it with the balancing machine? How is that possible without being intentional?

No one will take a dented or scratched rim. Most will not even take 2nd hand to re-sell; sell as scrap maybe. Its too difficult to warranty against any existing damage.

Speaking about rim damage, my friend just told me on saturday that his friend's rim actually broke going over a hump with some passengers in his car. His rims were cast ones from taiwan.

EBS

Rims, forged or cast should not cracked easily unless the manufacturing process or QC is no good or the rim (esp if u buy used) has already had structural defect (eg hit curbed, accident etc etc). If its new, then better stay away from that particular brand.

morganoh

Just a rough estimate. The tire and rims are heavy so when they lift it up and put it on to the machine the guy accidently hit the rim onto the side of the maching.
(the resting position of the machine is around our waist height)

Emperor

Most probably they will only hit the insides and not the outside.

In the case of metal products, its very hard to tell if there are any weak points. All it takes is a tiny tiny bubble or fracture and over time it will break further. QC can only minimise such defects. But generally forged ones are stronger as they are well forged from a solid piece of metal rather than being cast. Just imagine gelatin poured into a mould, there will definately be air bubbles.

CoupeM

Sound like prodrive rims....alamak i also using leh and been to track with it twice. bro dun scare me leh.

Goody

I don't know how to attach the pictures here, trying to ........but at the meantime please see them in the below link. You could see that it was dented to almost a straight line, quite bad actually. Wonder is it safe to continue use it?

http://pg.photos.yahoo.com/ph/hiseek...eker/my_photos

Emperor

Thats serious! From the looks of it, must be dented by the mechanic. Looks like the mechanic dropped it on the floor.

Safe or not? Hard to say but personally i will go back to the shop immediately. When its dented like that, its no londer perfectly round.

I thought your damage was superficial surface dent or scratch.

sqflyer

That looks seriously warped! I think it's kinda hard to blame the rim/tire shop since you've been driving around for more than 2 weeks. No rim/tire shop would offer to compensate you once you drive out of the shop. Of course you can say that you don't recall hitting anything, but they can also say they don't recall dropping or damaging the rim during installation. I don't mean to sound like the bad guy here, just trying to get you mentally prepared when you approach the shop.

Emperor

Ya. It will be next to impossible for them to sell so they most prob will not take it back. 2 weeks is a long time. If you went back immediately maybe still got chance.

Worse comes to worse, buy 1 rim from another shop. And keep the old one as spare.

sqflyer

Hopefully you can find ex-stock and shop willing to sell you just 1 pc. Else have to indent which might take a while...

BlackEight

bro,

i thought it was only a scratch. that is quite serious.

is that a prodrive GC06 18 inch?

if it is, my friend looking to sell 2 pieces becoz he
want to get 2 pieces deep dish.

his rims is the same colour,
offset about 50.
about 2 months old scratchless on a IS250.

sqflyer

It's definitely GC-06... juz hope the size, offset and colour all matching.

Mugo

Honestly, it doesn't look like a kerb-strike to me. I can't say for sure from those pics, but the tyre side walls do not have those tell-tale scrape marks if it were a kerb-strike.

Moreover, a dent like that is cause by a force from the outer edge inwards.

1. Does the dent have scrape marks (rough surface)?
2. Does the dent have black tyre marks?
3. Are your tyre pressure low? Or is it going lower?

Anyway, you gotta change the rim. Now question is, you pay or they pay.

Goody

Many many thanks to all your inputs and advices.
Yes, they are GC-06H offset 44.
Yes, the dent has scratch marks, some very deep so become very rough surface. No tyre marks. Pressure was set by the tyre shop at 250. Using std shocks.
Went back to the shop yesterday. They took picture and said will lodge a claim to Japan. Will know the result in a week time. Now just wait and hope for the best lor...
Anyway, they said it is still ok to use the rim/tyre, only will have vibration at high speed.
Cheers.

Emperor

At least they are responsible.

But maybe you should lay off the high speed for awhile. Afterall the tires are held in place by the rim and air pressure only.

Goody

Yeh, at least they suggest some actions. Actually I was prepared for the worst after I saw bro sgflyer advice.

Will take your good advice bro, just to keep to speed limit for time being ..... many thanks.

Mugo

Hmm if there are very rough edges, then its likely its a kerb-strike.

But if there aren't any marks on the tyre walls itself then its strange.

What are your rim width and tyre width anyway? Are your rims protruding out from the tyres (rim too wide for tyres)?

Nice to know your shop is helpful and responsible.

Goody

thanks bro.

the rear tyres are 265, i don't know the rim width, but can see that the tyre slightly protruding out.

the shop said that it could be probably a kerb-strike at an angle that compresses the tyre (as it is flexible) and damage the rim. but the problem was i didn't remember hitting anything hard enough to that extend.

PitchBlaC

Most tyre shops will use something like a crow bar to fit the tyre during the fitting process. Maybe that explains why the scratch is on the inside, not the outside. But a dent to that extent is quite puzzling. Is hercules working there?