how much difference is 6mm?
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how much difference is 6mm?
Postby usernameforme » Tue Nov 29, 2011 12:34 pm
this may seem like a really noob question but just wondering how much difference 6mm is on the rim? you get 24mm rims that don't have the word "aero" associated with them but 30mm rims do. just wondering how much difference half a centimeter could make (besides weight)
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Re: how much difference is 6mm?
Postby sogood » Tue Nov 29, 2011 12:38 pm
RK wrote:And that is Wikipedia - I can write my own definition.
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Re: how much difference is 6mm?
Postby usernameforme » Tue Nov 29, 2011 12:52 pm
wow, i didn't know you peolpe knew so much about these things thanks for your helpnorbs wrote:| | About that much.
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Re: how much difference is 6mm?
Postby glennb » Tue Nov 29, 2011 12:59 pm
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Re: how much difference is 6mm?
Postby MichaelB » Tue Nov 29, 2011 1:03 pm
usernameforme wrote:hello
this may seem like a really noob question but just wondering how much difference 6mm is on the rim? you get 24mm rims that don't have the word "aero" associated with them but 30mm rims do. just wondering how much difference half a centimeter could make (besides weight)
Yep, noob question.
Reality is despite the marketing fluff, to all but racing types, difference is sweet fanny adams.
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Re: how much difference is 6mm?
Postby tallywhacker » Tue Nov 29, 2011 3:54 pm
umm, not really percentage difference is 70% (percentage change is 108%)sogood wrote:Not a lot. 24mm going to 50mm would be more significant, but even that % difference is in single digit.
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Re: how much difference is 6mm?
Postby sogood » Tue Nov 29, 2011 4:02 pm
Sorry, I should have been more specific in my reply. Given the context of aeroness, the percentage difference referred to power saving as a result of aerodynamic characteristic of the wheelset.tallywhacker wrote:umm, not really percentage difference is 70% (percentage change is 108%)sogood wrote:Not a lot. 24mm going to 50mm would be more significant, but even that % difference is in single digit.
RK wrote:And that is Wikipedia - I can write my own definition.
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Re: how much difference is 6mm?
Postby usernameforme » Thu Dec 01, 2011 10:33 am
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Re: how much difference is 6mm?
Postby sogood » Thu Dec 01, 2011 10:46 am
Well, there are many variables to aero characteristics and power efficiency of a wheelset, not one that a lay person can figure out just by a quick look. Also bear in mind that aero performance is not an all or none phenomenon, it doesn't suddenly performs better by hitting 50mm, but it's a continuum of performance changes. Further, aero performance isn't just about rim depth. Spokes and hub also play a part. In any case, the general understanding is that aero will always trump weight. But even that depends on how much more weight. The statement stays true though for wheels in the same class.usernameforme wrote:so i wouldn't notice the "aero" difference in a 30mm rim compared a 24mm rim? i take it that it is better to get a lighter rim then a aero rim
The other aspect to consider is the quality of bearings and rigidity. They also play a role in power efficiency. Selection criteria shouldn't be based on a single criteria.
RK wrote:And that is Wikipedia - I can write my own definition.
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Re: how much difference is 6mm?
Postby igstar » Thu Dec 01, 2011 12:49 pm
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Re: how much difference is 6mm?
Postby sogood » Thu Dec 01, 2011 12:53 pm
Theoretically, deeper rims will give a harsher ride as they should be more rigid in the vertical plane. Lateral stiffness depends on rim, lacing, build and other factors.igstar wrote:I have just built a set of 30mm wheels (plenty of these rims around) and have been happy with them. I have been riding 24mm so far and have noticed a somewhat stiffer ride.
RK wrote:And that is Wikipedia - I can write my own definition.
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Re: how much difference is 6mm?
Postby master6 » Thu Dec 01, 2011 3:03 pm
You are an optimist norbs.norbs wrote:| | About that much.
It is actually a little less than that. (Or did you apply the Coffee Shop Admiration Factor? That could boost the result significantly)
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Re: how much difference is 6mm?
Postby jacks1071 » Sat Dec 08, 2012 12:47 am
Aero trumps weight.usernameforme wrote:so i wouldn't notice the "aero" difference in a 30mm rim compared a 24mm rim? i take it that it is better to get a lighter rim then a aero rim
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Re: how much difference is 6mm?
Postby humanbeing » Sat Dec 08, 2012 8:01 am
Better engine trumps aero?jacks1071 wrote:Aero trumps weight.usernameforme wrote:so i wouldn't notice the "aero" difference in a 30mm rim compared a 24mm rim? i take it that it is better to get a lighter rim then a aero rim
1995 Bosevski - Athena
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Re: how much difference is 6mm?
Postby human909 » Sat Dec 08, 2012 8:35 am
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Re: how much difference is 6mm?
Postby g-boaf » Sat Dec 08, 2012 8:39 am
Never noticed much difference between standard wheels, 50mm and 65mm which I have now in terms of the rigidity.sogood wrote:Theoretically, deeper rims will give a harsher ride as they should be more rigid in the vertical plane. Lateral stiffness depends on rim, lacing, build and other factors.igstar wrote:I have just built a set of 30mm wheels (plenty of these rims around) and have been happy with them. I have been riding 24mm so far and have noticed a somewhat stiffer ride.
But I did notice a difference in the speed (running above 50km/h) with the 65mm versus the 50mm which surprised me. The 65mm seems quite a bit quicker. Or maybe it was the fact that the engine wasn't misfiring on that day.
The better thing is the hubs - the new wheels have very good hubs on them. The weight difference between the two is marginal, to the point of not being worth mentioning as it is so small.
Probably very little. Upgrade the engine instead.usernameforme wrote:hello
this may seem like a really noob question but just wondering how much difference 6mm is on the rim? you get 24mm rims that don't have the word "aero" associated with them but 30mm rims do. just wondering how much difference half a centimeter could make (besides weight)
Very true! And to go with aero wheels, the super slippery skin-suit to give the ladies something to admire (or perhaps cover their eyes in horror).human909 wrote:Pose value at the cafe trumps all!
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Re: how much difference is 6mm?
Postby recumbenteer » Sat Dec 08, 2012 10:40 am
Get a Velomobile!!!!
..... now THERE'S your aero difference.... LOL
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Re: how much difference is 6mm?
Postby Riggsbie » Sat Dec 08, 2012 6:15 pm
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