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Post by janix on Jul 28, 2006 19:00:52 GMT 8
a word from the aerospace industry: -------------------------------------------------------------------------------- www.edocorp.com/CompositesStructures.htm"Composite aircraft structures provide improved strength and stiffness to weight performance, versus conventional fabricated aluminum structures. They offer improved fatigue life. They can be primed and painted like the rest of the airplane, and then corrosion eliminated in those areas of the airplane." www.lancair.com/Main/iv_ivp.html"Opposite of aluminum, composites have a near infinite fatigue life and the carbon fiber we use is, pound for pound, nearly three times stronger than steel" and "structure is comprised of several layers of woven carbon fiber, a film adhesive layer on each side of the Nomex core, and followed by closeout layers of woven carbon fiber. This creates an amazingly stiff, strong, and light composite that is capable of outlasting any aluminum structure" "unlike aluminum, composites are far more damage tolerant and virtually cannot be permanently bent" www.skyaid.org/Skycar/CarbonF...nstruction.htm"The characteristics of this composite are far more stable than an aluminum structure. This has essentially no fatigue life as compared to a very definite fatigue life with an aluminum structure," Danforth said. www.rpm-composites.com/index_7_Products.htmeven using composites to extend the fatigue life of steel structures: scitation.aip.org/getabs/serv...cvips&gifs=yesthis link has all sorts of fatigue / mechanical properties of different materials www.stormingmedia.us/keywords...echanics).html--------------------------------------------------------------------------------- TAKE NOTE THIS ARE AIRCRAFTS! it's different from bicycles but somehow the same. i wasnt thinking clearly. CF and Al survival depends on design, manufacturing details, and rider use. Have money? go carbon. Saving? go aluminium ;D tons of money? get one Ti and one CF. |
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Post by Dragunov on Jul 28, 2006 19:50:41 GMT 8
have lots and lots of moolah!? buy all of the above ;D
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Post by Dragunov on Jul 28, 2006 21:04:42 GMT 8
i like aluminum frames better coz i get to replace them every 2 yrs without having to find an excuse ;D they have a definite fatigue life so u have to replace it whether u like it or not  |
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Post by xctofi on Jul 29, 2006 10:08:44 GMT 8
well the above is far from what we have on bikes,but definitely if u got the dough,get what u can afford.personally i will not put my trust on carbons esp for handlebars and seat posts. as i read from an article @ MBAction, aluminum will bend first while carbon will just snap. and some say that when there is a sudden changes of weather (like what we have here most of the time) carbons tend to build moisture and might cause it to break.besides.whats the weight saving from going carbon to aluminum?grams?c'mon,a lil more grams a lil more savings.hehehe
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Post by Dragunov on Jul 29, 2006 10:26:06 GMT 8
well the above is far from what we have on bikes,but definitely if u got the dough,get what u can afford.personally i will not put my trust on carbons esp for handlebars and seat posts. as i read from an article @ MBAction, aluminum will bend first while carbon will just snap. and some say that when there is a sudden changes of weather (like what we have here most of the time) carbons tend to build moisture and might cause it to break.besides.whats the weight saving from going carbon to aluminum?grams?c'mon,a lil more grams a lil more savings.hehehe your right tofi, i dont trust carbon either, saw a buddy of mine snap his easton carbon seatpost  |
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Post by GALVinChie on Jul 29, 2006 12:30:59 GMT 8
All reasons are already mentioned kaya I'm no carbon fanatic.
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Post by skarhed on Jul 29, 2006 15:08:27 GMT 8
It's true, carbon is a wonder material, but at a price... lifespan and cost! Aluminum also has it's downside, fatigue life and damage / dent resillience is not up to par with Cromo or Titanium. If you think about it, there is no "perfect" material to suit all types of bike... unless we get out hand on alien technology!  |
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Post by joes on Jul 29, 2006 15:39:46 GMT 8
adamantium. hehehehe.
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Post by king on Jul 29, 2006 19:57:31 GMT 8
i have an old gary fisher carbon fiber frame. i wouldnt get a brand new one though. there's a crack in one of the chainstays, that surprisingly hasn't gotten any worse. it's also all scratched up. aluminum, steel or ti frames you can refinish and repaint pretty easily. carbon fiber? perhaps, if you do it veeeeery carefully.
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Post by woofers on Jul 29, 2006 21:20:10 GMT 8
CF frames will start getting cheaper once the Chinese start selling unbadged "generic" CF frames. It will never be as cheap as aluminum or steel, since the lamination/epoxying process is more complex than just welding or soldering tubes.
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Post by pjax on Jul 30, 2006 12:31:48 GMT 8
unless we get out hand on alien technology! the "just add water" continent from krypton! (that movie was bad) don't hurt me  |
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hingal aso
Free Rider
In my dreams!!!!!!!
Posts: 237
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Post by hingal aso on Jul 31, 2006 4:53:31 GMT 8
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Post by 'Bee' on Jul 31, 2006 9:23:59 GMT 8
I'm not fan of carbon components but I do use a piece or two on my bike(s) particularly EASTON, for the needed weight saving (i'm not saying Easton is the lightest available but I'm an Easton sucker, ehehehe). ;D In my opinion, carbon components will last longer if we would pay attention to it's intended usage. Also, you have to be carefull when installing carbon stuff. Make it a habit to do a bit of filing on the edges of the clamps that you use i.e. brake lever and shifter clamps, seat tube edges, stem clamps and face plates, etc. I have an Easton EC70 seatpost on one of my bike for more than 2 years now, gasgas na yung labas, but still going strong.  |
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Post by wcoastbo on Aug 1, 2006 7:00:06 GMT 8
on my f/s bike I've had a carbon seatpost for several years without a problem. At my weight and riding style I'll never break an undamaged CF seatpost, especially on an f/s bike.
on my hardtail I have an American Classic Ti seatpost. my friend says he can see the post bending and flexing alot when I'm on the saddle riding over bumps. This helps soften my ride compared to an aluminum or carbon post.
BTW... this is the same post that was on my friends roofrack when he drove into his garage. broke the fork dropouts and tore off the seat. nothing but a scratch on the polished finish. i'll post pics if I can find them.
I'm sold on Ti.
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Post by Dragunov on Aug 2, 2006 2:06:17 GMT 8
long live titanium now, where can i buy a titanium frame here ;D |
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Post by ronaldarca on Aug 2, 2006 3:31:04 GMT 8
that's why im reconsidering buying Ti from u pete no carbon handlebars for me, too. (almost becoming weight weenie) |
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Post by Dragunov on Aug 2, 2006 12:42:52 GMT 8
that's why im reconsidering buying Ti from u pete no carbon handlebars for me, too. (almost becoming weight weenie) hala, ur having 2 of the worse diseases, upgradititis and weight weenieism hehehehehhe prapare ur pockets hehehehhehehe ;D |
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Post by king on Aug 2, 2006 14:59:22 GMT 8
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Post by kulot_salot on Aug 3, 2006 10:10:39 GMT 8
las year i found a mongoose Ti hardtail frame for 30tons....
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Post by janix on Aug 3, 2006 16:39:27 GMT 8
las year i found a mongoose Ti hardtail frame for 30tons.... 30tons? whats that? the weight or the price? hehehe |
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boyet
Free Rider
Posts: 309
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Post by boyet on Aug 3, 2006 22:54:19 GMT 8
As for now Aluminum still dominant in terms of strength and affordability. While Carbon is for weight concious rider and can't be use for abuse riding style. Ti for those with deep pocket. hehehe
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Post by kulot_salot on Aug 4, 2006 8:11:41 GMT 8
PHP30T pre.... put 'tons' as unit cuz for me its not feasible to buy a HT that cost like a FS... hehehe....
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Post by dattebayo on Aug 8, 2006 23:22:04 GMT 8
when the wright brothers created the first airplane, it is made out of bicycle parts. now thanks to the advancement of aerospace industry, bicycles nowadays benefitted from them. from carbon fibers to aluminum to titanium.. lance bike, for example, (trek madone) is a product of aerospace technology..
carbon frames are good in terms of stiffness, lightness. but as long as you don't crash them..aluminum is also the same but true to the fact that it has a limited life.. titanium can be lasting and strong but not an ideal frame for bike coz it twitches and flexes, esp if your a heavy rider.. that's why you don't see any titanium frame in tour de france..it can only be aluminum alloy or carbon fibre or both.
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Post by >rocketman> on Aug 9, 2006 0:34:10 GMT 8
that's why race face still sitcks with aluminum for freeriders and huckers abuse.
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Post by wcoastbo on Aug 9, 2006 7:59:18 GMT 8
titanium can be lasting and strong but not an ideal frame for bike coz it twitches and flexes, esp if your a heavy rider.. that's why you don't see any titanium frame in tour de france..it can only be aluminum alloy or carbon fibre or both. personally I wouldn't have a bias towards a frame just because of the material used. any improperly built frame will be flexy... ti, aluminum, carbon or steel. a frame thats designed properly will be light, non-flexy and durable... regardless of the material. |
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leo
Bike Commuter
Posts: 68
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Post by leo on Aug 9, 2006 21:08:55 GMT 8
Do any manufacturers offer no bull warranty coverage for carbon frames ? Some do for aluminum ,but it is interesting to note that the only lifetime warrantied frames that i have come across are titanium frames. I guess if you buy a frame from a company known for producing good performing bikes and if they are willing to stand by their product with good warranty service you would be set , regardless of the material used .
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Post by jr on Aug 9, 2006 21:23:57 GMT 8
Do any manufacturers offer no bull warranty coverage for carbon frames ? Some do for aluminum ,but it is interesting to note that the only lifetime warrantied frames that i have come across are titanium frames. I guess if you buy a frame from a company known for producing good performing bikes and if they are willing to stand by their product with good warranty service you would be set , regardless of the material used . Trek bikes...all there frames are lifetime warranty. |
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Post by uphiller on Aug 10, 2006 15:56:33 GMT 8
nice presentation brad! |
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schwinng
Free Rider
Save the planet, ride a bicycle!
Posts: 293
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Post by schwinng on Aug 11, 2006 12:14:20 GMT 8
I'm a weight weenie, hehehe. I ride a Calfee carbon frame with titanium droupouts. Alpha Q fork with carbon steerer, carbon seatpost and Topolino Revelation C19 kevlar wheelset. Over 3000 miles so far and nothing has been broken. And oh yeah my frame has a 10 year warranty, it's not lifetime, but I'm so addicted to everything bikes, I'll probably save enough moolah to buy me another rig in 10 years.
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lexor
Urban Assaulter
Never try Never Fail... Padyak lang ng padyak Dude!!!
Posts: 79 
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Post by lexor on Sept 30, 2006 22:51:22 GMT 8
it depends within the manufacturers quality developing Carbon and aluminum and how the owner handle his/her bike components.....
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