a formula that worked well: A relatively flexible top tube (usually 1/8" smaller in diameter than the down tube), a somewhat stiffer top tube, and very stiff (i.e., heavy and relatively short) chainstays.
My Bleriot (22.1 lbs) is only about 3 lbs. heavier than my Giant defy 3.I am not sure which bike is "faster" than the other.The Bleriot feels slower, but I have my fastest commute time on it.The Defy feels bouncy and twitchy but faster in take off and general riding.The Bleriot feels stable and predictable and lower to the ground. I prefer the Bleriot ride because I feel safer on it and there have been times like yesterday when I am sure I would have crashed if I had been on the Defy road bike, but the wide tires of the Bleriot helped me roll harmlessly over road cracks along the narrow shoulder as a car passed.
In honor of Jan, I did my Ballard Trader Joe's grocery trip this morning with decreased tire pressures (about 65psi) and front loaded maybe 10 pounds of food in the basket. The Soma still climbed like mad rat. Budget grocery randonneur :)
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Personally, I don't think about weight. I select components that have the appropriate mix of function, looks, weight, durability, street cred, and affordability, and let the bike weight be the dependent variable. Then I add 30 pounds of miscellaneous crap in various bags and accessories. Then I ride and don't think about weight, or even speed.
For me, as an unracer and unrandonneur, weight and speed are irrelevant, except that I need to have a rough idea how many minutes I should expect for my commute, so I'm not late.
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next thing you know someone is going to say skinnier tires are faster too!~mike
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The only real way to compair weights is to have a frame built up with normal duty "heavy" Riv-ish parts and then build it again with lighter "racing" parts. Then you'd be able to notice a weight diffence.Scott
The only real way to compair weights is to have a frame built up with normal duty "heavy" Riv-ish parts and then build it again with lighter "racing" parts. Then you'd be able to notice a weight diffence.Scott
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For a mind-blowing example of the above, be sure to read the road test
of the titanium road bikes in the current issue of BQ. (I'm going to
leave the big reveal to Jan, if he wants to pick up on the cue...)
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There must be beauty in that frame to many eyes, but it escapes me. But then, I’m turning 60 in 3 weeks, and officially entering curmudgeonhood.
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Which one, Bill – they’re all slow and load-carrying. It’s just a question of a six, a case, or a keg….
From: rbw-owne...@googlegroups.com [mailto:rbw-owne...@googlegroups.com]
On Behalf Of William
Sent: Tuesday, January 15, 2013 6:58 PM
To: rbw-owne...@googlegroups.com
Subject: Re: [RBW] Re: Weight's a weird thing
News flash. My man Pudge has retro-grouch tendencies. Show us your beer-truck again!
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Eflayer’s response does make me think I gotta ride on of those things at least once in my life. But gateway drugs frighten me…
From: rbw-owne...@googlegroups.com [mailto:rbw-owne...@googlegroups.com]
On Behalf Of William
Sent: Tuesday, January 15, 2013 6:58 PM
To: rbw-owne...@googlegroups.com
Subject: Re: [RBW] Re: Weight's a weird thing
News flash. My man Pudge has retro-grouch tendencies. Show us your beer-truck again!
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Eflayer’s response does make me think I gotta ride on of those things at least once in my life. But gateway drugs frighten me…
From: rbw-owne...@googlegroups.com [mailto:rbw-owne...@googlegroups.com] On Behalf Of William
Sent: Tuesday, January 15, 2013 6:58 PM
To: rbw-owne...@googlegroups.com
Subject: Re: [RBW] Re: Weight's a weird thing
News flash. My man Pudge has retro-grouch tendencies. Show us your beer-truck again!
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Ah, there’s hope for yet!
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For <me> yet, that is
Which one, Bill – they’re all slow and load-carrying. It’s just a question of a six, a case, or a keg….
From: rbw-owne...@googlegroups.com [mailto:rbw-owne...@googlegroups.com] On Behalf Of William
Sent: Tuesday, January 15, 2013 6:58 PM
To: rbw-owne...@googlegroups.com
Subject: Re: [RBW] Re: Weight's a weird thing
News flash. My man Pudge has retro-grouch tendencies. Show us your beer-truck again!
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I think this whole frame flex business has something to do with rider power and weight also.
On Tue, 2013-01-15 at 09:08 -0800, Jan Heine wrote:
>
> That explains why in our experience, performance correlates only very
> weakly with weight, but very strongly with optimized frame flex
> characteristics.
For a mind-blowing example of the above, be sure to read the road test
of the titanium road bikes in the current issue of BQ. (I'm going to
leave the big reveal to Jan, if he wants to pick up on the cue...)
> (Of course, weight and optimized frame flex characteristics are
> correlated on most bikes, hence lightweight bikes often perform better
> than heavier ones.)
But http://www.youtube.com/watch?v=i0vEgU88IQQ
The builder of the bike that was consistently ridden faster in the test, states that the reason being it is "stiffer in the bottom bracket area". I would have expected the other bike to be the faster based upon previous tests that Jan has done for BQ. The builder goes on to point out that his bike is the less comfortable of the two bikes being compared, also because of this stiffness. The results just seem counter to the concept of "planing". I prefer to ride a more flexible frame, but not for the reason of pace. Maybe Jan would like to expand more on this?
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