i mean if u ride slow, u have bal issue since the handle bar have limited movement, if fast no bal issue but avoiding obstacle problem.

sniper will have 1st Callaway kick stand

Dear Santa,

I've been a good sniper this year and all I want for Christmas is for Raceface to come out with matching sets of Next SL 1K carbon kickstand and fenders.

If the Canadians have no balls to do it, an Easton EC90 version also can.

Tengkiu ah Santa

Bikers in the buff

This post has been edited by snapshots: Nov 5 2009, 12:31 AM

Things get better sometimes after complaints (Good for us, just like carbon products getting better each day)

Haha, it's a lose-lose situation.

chamelion likes this

I bet it's gonna hurt... hope they're not using carbon saddles.

u can see actual gobi xm flexi post in action..

I've got a question since I can't sleep (and I don't have to sleep).
What's the difference between MTB and Road-bike saddles?

erkkk my 2cent... in formula 1... i tot they change the monoque every 2-3 race.. and the wings are adjusted differently in every track.... so no age limit issue for carbon in F1 or in any other professional race... since no team in F1 still using their 5 year old wings or monoque... hmmmmmm...

korek me if i am wrong...

same as the phrase (in street modified cars)"if this turbine is not good then y the GT japan use it?" then i asked " how many time in a year the gt japan team service the ball bearing turbine? "

edit: in MTB context.... yes there is a DH carbon bike... but those sponsored team... did they still use the same frame in the next 5 years.... and yes... if u can afford to change ur frame every 5 years.. (heck... some of us got poison... change frame every 3 month also have....)...so go carbon...

carbon is good... lighter... and stronger than alu....... but the only draw back is... it loses it strength over time....

but of course carbon technology is getting better and the construction/strength is depending on how it is manufacture.....

but comparing an average comsumer with a pro team.......



This post has been edited by Lord_darkslide: Nov 5 2009, 10:28 AM

+1

I'm no expert but most metals including aluminum AND carbon will fatigue over time.

Here's some applications where they don't change the parts every couple years:
- Airplane wings (high load.. design life of up to 25 years in commercial airliner)
- Production supercars... Pagani Zonda, Mclaren F1, Ferrari Enzo etc.

The Comet airliner dissaster... Hawaiian airline dissaster.... those are all well documented instances related to aluminum fatigue

In terms of crash worthiness.....Assume same thickness:
- Aluminum is easier to dent... if it loses shape.. it snaps (not bend like steel)
- Carbon fibre is harder to dent but if does crack the weave... it will also snap.

Personally I think the only difference just the $$$ and initial investments is hugely expensive and risky (if the geo's wrong= scrap mould... for aluminum can always tweak and tune as you go along) especially for something like a bike frame (heck... ya need at least 3 sets of moulds for different sizes) and this brings it out of reach for the small bike brands.

If I'm their marketing guy... I also won't say that we don't make carbon frames because we're only a 3 man show and I cannot afford to blow some hundred g's when we only sell 3000 bikes mixed models a year total.. and I cannot amortize the damn initiall cost into this without making my already very very expensive frames totally unreacheable for everyone except Warren Buffet.. and he doesn't even ride...

So I'll say carbon suxs to all my fanboys (after a few knocks on the head, they wouldn't realize anyways) and thick big aluminum blocks rulez... besides.. those big lansi taiwan factory won't accept my small 250units per month order so I can only look for the mama and papa ones in taichung and they don't even know what is hydroforming.

Point is... if a frame/stem/post/bar whatever are subjected to high stresses of 10 feet drops etc.. it WILL fatigue regardless of the material. The same thing riden by an old aunty at 5kmh will last 10 lifetimes.

If we read the fine prints, most mat salleh (since they're more careful about litigation) brands recommends replacements of both carbon and aluminum handlebar/stem/posts maximum every 2 years or after a heavy fall.

Jeng jeng... another signature long post.

This post has been edited by sniper on the roof: Nov 5 2009, 11:17 AM

just a note:
fatigue is a failure due to prolonged, cyclic stress..even minor stress (much lower then the ultimate tensile strength of the material)
steel have a very good resistance of fatigue failure..

actually. good steel frame is not cheap either..

Damn... this thread is becoming an educational thread instead of sports. He! He! He!

Carbon ok what. Looks good. Stronger than steel/metal.

He! He! He! In term of lifetime of the product... why we never ask the manufacturer on this?

carbon is shortest. actually is not the carbon but the epoxy the bond the carbon have short life span and low scratch tolerance.

Actually it's both. During the time I was very active in this thread, I learned alot from the sifus here. Hail to the sifus!

carbon fibre not necessary stronger..
but weight to weight..maybe it does..
even spider web is 'stronger' then steel cable

in F1..they use it because it is easily break into pieces during crash..
hence absorb the impact force..hehehe

Yup... and they are using spider web technology to do kevlar!

we should do this every now and then. hopefully more female will join this. blur sotong perhaps

http://video.msn.com/video.aspx?mkt=en-my&...a0-92708848bcec