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Author Topic: Interesting-Rolling resistance test result  (Read 3042 times)

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Offline treadlight

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Interesting-Rolling resistance test result
« on: September 05, 2008, 12:01:15 PM »

Offline FACTORe

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Re: Interesting-Rolling resistance test result
« Reply #1 on: September 05, 2008, 12:07:06 PM »
bad link - allthough I went to the site and hit the link - good information
« Last Edit: September 05, 2008, 12:13:51 PM by FACTORe »

Offline Gregg

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Re: Interesting-Rolling resistance test result
« Reply #2 on: September 05, 2008, 12:15:36 PM »
ditto

Offline FACTORe

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Re: Interesting-Rolling resistance test result
« Reply #3 on: September 05, 2008, 12:18:49 PM »
not only do the fatties not pumped up super high pressure roll as good but...you gain control and if you have control through corners....you carry more speed.

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Anthem1

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Re: Interesting-Rolling resistance test result
« Reply #5 on: September 05, 2008, 02:10:12 PM »
I hear what your saying, BUT with all the money, time and research spent by the pro XC teams and riders why do you reckon they continue to roll narrow tires? I don't question that wider offers more control and in the right disipline like downhill and freeriding is the way to go but if wider was more efficient in XC don't you think team riders would be rolling fatties?

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Re: Interesting-Rolling resistance test result
« Reply #6 on: September 05, 2008, 02:20:36 PM »
The answer is grams.
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Offline FACTORe

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Re: Interesting-Rolling resistance test result
« Reply #7 on: September 05, 2008, 02:21:27 PM »
I was going to say that - rotational weight = so it is a matter of trade-off...what can each individual make work the best for them

Offline obelisk29

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Re: Interesting-Rolling resistance test result
« Reply #8 on: September 05, 2008, 02:34:22 PM »
I hear what your saying, BUT with all the money, time and research spent by the pro XC teams and riders why do you reckon they continue to roll narrow tires? I don't question that wider offers more control and in the right disipline like downhill and freeriding is the way to go but if wider was more efficient in XC don't you think team riders would be rolling fatties?

Ever heard of a term called groupthink.

Groupthink is a type of thought exhibited by group members who try to minimize conflict and reach consensus without critically testing, analyzing, and evaluating ideas. During groupthink, members of the group avoid promoting viewpoints outside the comfort zone of consensus thinking. A variety of motives for this may exist such as a desire to avoid being seen as foolish, or a desire to avoid embarrassing or angering other members of the group. Groupthink may cause groups to make hasty, irrational decisions, where individual doubts are set aside, for fear of upsetting the groupís balance. The term is frequently used pejoratively, with hindsight.
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Anthem1

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Re: Interesting-Rolling resistance test result
« Reply #9 on: September 05, 2008, 02:35:26 PM »
In reading that piece from Schwalbe they addressed the weight issue stating that to spin the extra 500 grams of a wider pair of tires up to speed in 4 seconds required an additional 15 watts but once up to speed saved you like 50 watts rolling resistance. Seems like watts well spent but like you guy's mentioned rotational weight goes along way while sprinting, accelerating out of turns, etc: That extra kick required each time you accelerate that extra mass add's up. Having recently run a set of 2.3 Eskars out at flatwoods, I enjoyed the extra cushion in Heart Break but  the extra effort required to spin them up to speed was noticeable.

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Re: Interesting-Rolling resistance test result
« Reply #10 on: September 05, 2008, 02:39:30 PM »
I hear what your saying, BUT with all the money, time and research spent by the pro XC teams and riders why do you reckon they continue to roll narrow tires? I don't question that wider offers more control and in the right disipline like downhill and freeriding is the way to go but if wider was more efficient in XC don't you think team riders would be rolling fatties?

Ever heard of a term called groupthink.

Amen
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Anthem1

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Re: Interesting-Rolling resistance test result
« Reply #11 on: September 05, 2008, 02:44:11 PM »
Are you suggesting that a highly competitive race team would run a sub-standard setup to avoid embarresment? These guy's are shaving their legs, don't you think they would risk breaking the mold and run wider tires if that meant a spot on the podium?

Offline obelisk29

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Re: Interesting-Rolling resistance test result
« Reply #12 on: September 05, 2008, 02:45:51 PM »
It's not only to just avoid embarrassment but it's more holding on to a certain way of thinking.
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Re: Interesting-Rolling resistance test result
« Reply #13 on: September 05, 2008, 02:52:37 PM »
How often in a race are you running a constant speed?  That constant accelerating, braking, climbing, descending all adds up and is very hard to duplicate in a 'scientific experiment'.  There's a reason why race teams, particularly in F1, do all sorts of computer simulations for each track to get their initial car setup but then fine tune it at the track in real world conditions.
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Offline treadlight

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Re: Interesting-Rolling resistance test result
« Reply #14 on: September 05, 2008, 02:52:58 PM »
Are you suggesting that a highly competitive race team would run a sub-standard setup to avoid embarresment? These guy's are shaving their legs, don't you think they would risk breaking the mold and run wider tires if that meant a spot on the podium?
No, but IMHO it goes back to the variables you have no control over when riding or racing specifically the type of terrain and the amount of terrain types on each course. On typical competive xc racing they usually does not have a long gravel terrain or long grassy meadows and maybe that is why they stick to a narrower tires.

As a recreational rider my top priority are the pressure on my tires.

 

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