Thread: Switching from Steel to Alloy Rims

Originally Posted by B92 8NW

12kgs then. Assuming 300Tdi automatic 0-100 in 19secs. Assuming 1,950 kg. Assuming linear rate of change of speed... (and lots of other assumptions)

There should be an increase in acceleration of 0.008996307692307692 m/s^2

Ah - there is a flaw - on the disco, alloys and hence tyres are slightly wider so as you accelerate wind resistance caused by the wheels increases by the square of the speed increase - so cancelling out any increase in acceleration.

Garry

Originally Posted by nice1guv

So the tyres will be burning then!

But I'm still not convinced on the weights.

When I had a steel rim with tyre on, it was quite heavy to pick up and put on the back door whereas an alloy is almost a one handed job.

The steelie makes the rear suspension sag, the alloy nothing

.

I think your believing what you want to believe here. I can tell you in no uncertain terms that even an alloy makes the back drop.....and they are not that light with a tyre, lighter than a steel but not as light as you are making out.

why don't you just put some alloys on and film your car and its awesome accelerating power so we can all watch in ore of it......

Are the alloys and steel you refer to off a disco? or are you talking about wheels you have handled on another car..

Originally Posted by cooper

Perhaps if you overinflate the tyre it will be lighter,more air,less weight

LOL

Originally Posted by dullbird

I think your believing what you want to believe here. I can tell you in no uncertain terms that even an alloy makes the back drop.....and they are not that light with a tyre, lighter than a steel but not as light as you are making out.

Are the alloys and steel you refer to off a disco? or are you talking about wheels you have handled on another car..

I originally had a steel D1 rim as a spare and then bought an extra freestyle D1 alloy to replace it.

Same tyres on both rims, the alloy was nice and light, easy to handle. When I put it on the back of the Disco it virtually didn't sag.

The steel rim and tyre was heavy and hard to lift, certainly felt like way more than 3kg difference to the alloy. On the back of the Disco, it noticeably sagged.

Do you have a steel rim with out a tyre on it you can weigh? I have 5 alloy rims in the shed so I could weigh one of them if my cooking scales can take the weight and then you will know

Let's make this an international collaborative effort to solve the problem.
Assuming negligible difference in gravitational force between 3 degrees north of equator and where you are, the steel Defender-type wheel (as used on my Disco) is a hair under 12kg. (I just went out to the backyard to weigh one of my spares.)
P.S. pls allow for difference between the bathroom scales (EKS brand) I used and your kitchen variety.

except they are not disco rims which is what he is talking about I'm not sure but its possible defender rims could be heavier as they can carry a heavier payload...so would not be a good comparison

nah...their probably lighter than the disco alloys as theey are only 5''wide

oh and they have rivits! they will be lighter than 3'' of weld..

cheers phil

ok i wasn't sure....
I will see if I can bust the kitchen scales so this man can finally know what they weigh..

EDIT: oh well that blows that out the water just realised my disco rims still have tyres on them So I thought ok I will weight he spare boost alloy for the defender..then just looked at the scales and it only goes up to 5kg........So sorry can't help you