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Finally, my answer to a long standing "discussion"
http://www.kawi2strokes.com/forum/viewtopic.php?f=2&t=12797		 Page 1 of 3
Author:  Ja-Moo [ Tue May 16, 2017 2:35 pm ]
Post subject:  Finally, my answer to a long standing "discussion"
For many years it has been discussed on the weight difference of aluminum VS steel rims. (not mags) I finally have 2 complete 500 front wheels, including disc, axle, both have SS spokes. Both rims are 2.15x18, one with a stock steel rim and the other with a Excel aluminum rim. Both tires are bt 45's with the one mounted on the steel rim just about void of tread, and a brand new BT 45 on the aluminum rim.

Final weight numbers:

steel rim assembly 28.4 lbs.

Aluminum rim assembly 26.6 lbs.

for a difference of 1.8 lbs. And that would be the rim, so a fair amount of extra centripetal force.
Author:  H1Steve [ Tue May 16, 2017 4:00 pm ]
Post subject:  Re: Finally, my answer to a long standing "discussion"
That is what I like, concrete data without a bunch a variables to mess the data up. :thumbup:
Author:  husson73 [ Wed May 17, 2017 4:48 am ]
Post subject:  Re: Finally, my answer to a long standing "discussion"
manage to fit next winter Campagnolo mag wheels (nice X mas present isn't it?) front and rear will weigh them and genuine before fitting :mrgreen:
Author:  rngdng [ Wed May 17, 2017 5:01 am ]
Post subject:  Re: Finally, my answer to a long standing "discussion"
Ja-Moo wrote:
For many years it has been discussed on the weight difference of aluminum VS steel rims. (not mags) I finally have 2 complete 500 front wheels, including disc, axle, both have SS spokes. Both rims are 2.15x18, one with a stock steel rim and the other with a Excel aluminum rim. Both tires are bt 45's with the one mounted on the steel rim just about void of tread, and a brand new BT 45 on the aluminum rim.

Final weight numbers:

steel rim assembly 28.4 lbs.

Aluminum rim assembly 26.6 lbs.

for a difference of 1.8 lbs. And that would be the rim, so a fair amount of extra centripetal force.


Doesn't the tire condition skew it a bit? The difference would be less if both tires were new.



Lane
Author:  Zambia [ Wed May 17, 2017 7:29 am ]
Post subject:  Re: Finally, my answer to a long standing "discussion"
Wouldn't it have been easier just to weigh an excel rim and a stock steel rim?
Author:  Walms [ Wed May 17, 2017 7:38 am ]
Post subject:  Re: Finally, my answer to a long standing "discussion"
It might take a bit of time to dismantle 2 wheels :mrgreen: but yeah, you would think someone who was in the process of the upgrade would have been curious enough to weigh them for a comparison?
Author:  Jim [ Wed May 17, 2017 8:34 am ]
Post subject:  Re: Finally, my answer to a long standing "discussion"
This weight difference doesn't sound like much... I just took ten pounds off my H2's front end by going from a stock type dual disk to a single disk and an EX caliper. :lol: The single disk is still stock too, so there are a couple pounds left if I slice it up.
Author:  Ja-Moo [ Wed May 17, 2017 9:05 am ]
Post subject:  Re: Finally, my answer to a long standing "discussion"
And the discussion continues......lol. :thumbup:

Yes, weighing the rims would have been the easiest, IF I had 2 bare rims at one time. But I never did. I just happen to have 2 identical front wheel assembles and decided to weight them. And lane, it was the steel rim that had the "slightly" worn tire, :lol: so if anything the weight difference would have been greater with 2 new tires. Maybe by a full pound or more, but I didn't want any guessing in the results. So 1.8 pounds is pretty much the minimal weight difference.

Now, if we can get someone to cut up a Lester mag we can do a real comparison for those...... ;)

Image
Author:  demus [ Wed May 17, 2017 9:09 am ]
Post subject:  Re: Finally, my answer to a long standing "discussion"
My only comment... Take more left turns John ( Or is it right ??? )
Too much track time for you :P
Author:  Walms [ Wed May 17, 2017 9:37 am ]
Post subject:  Re: Finally, my answer to a long standing "discussion"
I understand why unsprung weight is important to a suspension but I'm trying to wrap my head around the negatives of the increased centripetal force of the heavier rim? Maybe someone can chime in on that?
Also, can anyone claim they have noticed a noticeable improvement in handling when swapping out the steel for aluminum rims?
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