Author Topic: Bridgestone GR80  (Read 12989 times)

Offline clarence

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Re: Bridgestone GR80
« Reply #20 on: August 08, 2008, 12:03:32 PM »
I know that the stock 15" rims are heavy, about 7 to 8kg each.

Anyone knows which country the stock rims from Tan Chong are made in?

Offline NSman

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Re: Bridgestone GR80
« Reply #21 on: August 08, 2008, 12:15:31 PM »
Not Stock alloy rim, is the spare tyre "STEEL" rim
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Offline NSman

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Re: Bridgestone GR80
« Reply #22 on: August 08, 2008, 12:18:51 PM »
I know that the stock 15" rims are heavy, about 7 to 8kg each.

Anyone knows which country the stock rims from Tan Chong are made in?

If i'm not wrong, all rims are fitted in local, all new cars come to sg in steel rims & change it to alloy rims in one of the tyre shop. And the stock rims looks like advanti rim
"We, the La-tions of Sillypore,
Pledge ourselves as one United Road-User,
Regardless of Bhp, NA or TurboCharged,
To Build a LTA-less Society,
Based on Modifications and No TP,
So as to Acheive Roadhog Elimination, No ERP and
Automotive Progress for our Nation."

Offline aerosignal

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Re: Bridgestone GR80
« Reply #23 on: August 08, 2008, 12:41:06 PM »
can tell me, why the stock rims are crappy?

Not Stock alloy rim, is the spare tyre "STEEL" rim
Thanks! Exactly what I mean.
For the 4AT, stock actually is the steel rim in the spare tire. The alloy rim is actually part of leather seat package.
« Last Edit: August 08, 2008, 01:02:50 PM by aerosignal »

Offline Ender

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Re: Bridgestone GR80
« Reply #24 on: August 08, 2008, 02:53:04 PM »
If i'm not wrong, all rims are fitted in local, all new cars come to sg in steel rims & change it to alloy rims in one of the tyre shop. And the stock rims looks like advanti rim

I saw them changing rim from the steel one at Tan Chonh Lokyang..

Offline iagree

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Re: Bridgestone GR80
« Reply #25 on: August 08, 2008, 03:27:43 PM »
I saw them changing rim from the steel one at Tan Chonh Lokyang..

hello all

steel or alloy rims btr???
sorry, i must agree because i don't know how to disagree. agreeeee only....

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Offline hopeless2212

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Re: Bridgestone GR80
« Reply #26 on: August 08, 2008, 04:01:49 PM »
hello all

steel or alloy rims btr???


Bro.. for ur reference..

Most common are steel and aluminium alloy, exotic materials like carbon fibres being way out of financial reach of most ofroaders. You simply can't compare them as they are completely different by construction.

Steel

Most genuine wheels are made of steel. An stamped inner part is junctioned to a rolled outer rim and nowadays welded together. If you look at older rims on Willys of Toyotas you can still se that they were riveted together. The setup is strong, easy to repair but most important, cheap to fabricate. They can be painted over and over again if years of off roading take their toll. Many manufacturers use the same production method but take stronger and/or thicker materials to increase load capacity and they also make them in sizes better suited to aftermarket tires. The biggest disadvantage of steel is it's weight or better it's lack of performance. An alloy wheel will accelerate faster and stop quicker as well as reducing load on shocks and steering linkages. How can such a rather small weight difference make up for a drastic change you may ask. After all the difference will rarely exceed 8 pounds peer wheel. This would be true in a static situation.

But the wheel is a dynamic part on the car. It's weight must be accelarated and braked, it's movements must be tamed. And everyone familiar with physical laws can tell you that a moving parts inertia is completely different from a static part as the rest of the axle is (in this example).

Just to give you an idea of how much energy is stored in an tire wheel combo let me tell you something I saw myself: One day I was driving on the motorway to work when I was overtaken by an Alfa Romeo, you know, these small italian sports cars. The guy was doing about 110 Km/h when I noticed his left front wheel wobble and suddenly coming loose. The wheel slowly run along the car, then drifted to the middle when it hit the separation. Although it hit the wall at a very flat angle it immediately changed direction, jumped over the Alfa in windscreen height and only landed some 50 yards away in a meadow where it still went on for about 300 yards. Imagine how much force this took- and it was only a very small wheel, about 13inches with an equal small tire. Had it hit a car it would have smashed through the windscreen and killed everybody inside. Luckily the guy brought his car to a standstill with nothing more than a damaged brake disc.

So what does this show us? There's a tremdous amount of force stored in a rotating wheel. You need much energy to get it up to speed and you need also good brakes to bring it down. The steering linkages will wear faster too.The heavier a wheel/tire combo the more energy is needed. Similar for shock absorbers. If you have a heavy wheel they will take a beating. So aim for the lowest possible weight.

A steel wheel will also bend much earlier than an alloy wheel. But you can hammer an steel wheel back in shape while an alloy wheel will usually break. So if you intend to do many miles far away from civilization keep the steel. If shopping for used rims you can test them by mounting them and holding a pencil or similar against the edge and rotating the wheel. This runout can be of up to 2-3mm even on new wheels but I'd keep off if it exceeds more than this.

Old miltary wheels are mostly bent so keep that in mind. This is less of a problem on cars seldom exceeding 80 Km/h. Also it's not uncommon for steel to rust to a point where structural integrity is affected.

Aluminium alloys

One piece cast alloys

Up to 1/3th lighter than steel, resistant to bending and not too expensive they are good for almost all applications.Their disadvantage is that they can break. However this is very rare and only caused by violent encounters of the sort that would also ruin the tire and bend a steel rim They do get scratches and dents on the trail and don't support winter roads well without special care. If corroded they take more work to refurbish. Corrosion however rarely affects their structure to a point rendering them dangerous.

Two piece alloys

Also called modulars they have a cast center and a spun rim, held together by welds, rivets or even nuts and bolts.Their construction makes for a very strong and lightweight wheel but they are easily bent and hard to repair. They are also cheap to produce so they make up the majority of alloys for street going cars.

Forged alluminium alloys

Those are the best and most expensive wheels for our applications. They are way stronger than steel and lighter than most cast alloys. They are also the most expensive to buy.

cheers.




When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us.

HELEN KELLER

Offline iagree

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Re: Bridgestone GR80
« Reply #27 on: August 08, 2008, 07:22:21 PM »
wa lan
u gd in eassy leh
must score gd in exam???
sorry, i must agree because i don't know how to disagree. agreeeee only....

from
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Offline clarence

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Re: Bridgestone GR80
« Reply #28 on: August 08, 2008, 08:54:15 PM »
Did you write this yourself or did you extract it from some source?   ;)

You have to quote your source or your are guilty of plagrism  :ohmy:

 ;D  ;D  ;D

Offline hopeless2212

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Re: Bridgestone GR80
« Reply #29 on: August 08, 2008, 09:04:43 PM »
dunno from where oso.. found it in one of the folders in my lappy..titled RIMS... lol...  :bleh:


When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us.

HELEN KELLER