Carbon bike on a turbo ?

amaferanga

Imposter wrote:

TBH, you are usually fairly level with your posts here - has someone hijacked your account?

I was thinking the same. He's suddenly started posting tosh.

Mikey23

Something else for me to worry about though...

Bookwyse

Shit, I can't use my bike on the turbo but I also can't use it on the road in case I fall off and it slides across the road and under a van and breaks.

Where can I use the bike without the risk of it suddenly breaking for no reason?????

BillyMansell

Bookwyse wrote:

shoot, I can't use my bike on the turbo but I also can't use it on the road in case I fall off and it slides across the road and under a van and breaks.

Don'r forget you also can't get it wet or feed it after midnight!

Where can I use the bike without the risk of it suddenly breaking for no reason?????

Best option is remove saddle, seat post and pedals and scoot along (only at night of course to avoid sunlight damage) a la hobby horse style ensuring to make no contact with the frame.

Alternatively, suspend the bike in a hermetically sealed perspex box and store in an airtight and secure concrete bunker then sit down and cry for being so foolish to buy a death trap as, according to the internet, YOU WILL DIE when it makes the slightest contact with your skin!!!

That's all true and here's a pictures to prove it;

elderone

So all the pro teams who warm up and down on the turbo do it on spare bikes,do they.
I mean they wouldn,t want to descend at 60mph on there carbon bikes that have been on a turbo.

chrisaonabike

elderone wrote:

So all the pro teams who warm up and down on the turbo do it on spare bikes,do they.
I mean they wouldn,t want to descend at 60mph on there carbon bikes that have been on a turbo.

In fairness, don't they usually use rollers? It's a point well-made though.

Presumably, the alleged issue is the twist/shear that supposedly arises frome the side-to-side forces that happen when the back wheel is clamped, that don't happen when the bike is free to lean.

If this is an issue, then firstly, why is it any more an issue with carbon than it is with frames made from other materials?

But quite apart from that, surely if it was an issue, the people that would know for certain would be the manufacturers, who would all issue well-publicised warnings about using them on turbos. It would be clearly excluded from warranty claims, for a start - since they would hit them in the most important place of all, their wallet.

imposter2.0

ChrisAOnABike wrote:

In fairness, don't they usually use rollers? It's a point well-made though.

Mostly turbos..

davidof

I would have thought that aluminium bikes would have more issues with turbo use (if issues there are).

buckles

I've cracked two bottom brackets on aluminium frames

cougie

http://cyclingweekly.media.ipcdigital.c ... arm-Up.jpg

http://i1.ytimg.com/vi/Q8XB2exjRKg/maxresdefault.jpg

http://acnbpd2012.files.wordpress.com/2 ... 010750.jpg

http://i1.ytimg.com/vi/DpADqNybDMM/hqdefault.jpg

http://www.radioshackleopardtrek.com/si ... G_8710.JPG

http://cdn.media.cyclingnews.com/2011/0 ... 09_600.jpg

http://static.guim.co.uk/sys-images/Spo ... d--008.jpg

http://ww1.prweb.com/prfiles/2011/08/02 ... 20team.jpg

http://cdn2.media.cyclingnews.futurecdn ... g_8786.jpg

Can we put this urban myth to bed now ? ALL the teams warm up on turbos. Would they do that if there was the slightest chance that their bikes would shatter into a million pieces in the actual race ?

Buckles - are you for real ? I've broken two seatposts. Snapped two chains. Broke a rim. Umpteen spokes. Broken a saddle rail.
None of which happened on my turbo.

smoggysteve

Can anyone provide evidence of a turbo manufacturer that states on its products not to use a carbon framed bike? Or a bike company that says it's carbon bikes are not to be used on a turbo? considering these things have been around for the amount of time they have, if there was a shred of hard evidence to support it, someone would be saying so to cover their arses.

buckles

You will find it in the small print of most carbon bike owner's manuals.

imposter2.0

Nothing in the Specialized manual as far as I can see. Do you specifically know of a manual where the manufacturer specifically warns against use on a turbo, or were you just generalising and hoping for the best?

smoggysteve

Nothing in my Bianchi's paperwork. none in my wife's Cannondale. so far there are 3 of the biggest bike manufacturers on the planet and not a word on turbo trainers being likely to damage it.

If you expect people to believe any of this you are going to have to provide solid evidence. And a complaint or a rumour spread by a journalist are not. A turbo trainer when sold has to be fit for purpose. If it is known by the manufacturer to be damaging to certain bikes they are legally bound to mention it in its supporting documentation. not small print, but big letters, front cover or close to it. If they didn't, they could expect a lawsuit brought by any bike maker who have had customers report their bike was damaged and the turbo company did nothing to warn them in full knowledge it could.

cougie

Nothing came with my Planet X carbon bike. Or my carbon Giant.

I don't think I've ever seen a picture of one broken on the turbo - sure plenty on the road - but you can never be 100% sure why they broke - "just riding along" or a crash.

We need mythbusters to test this. Maybe its a bit niche though ?

diamonddog

Bike shops I visit have alu and carbon bikes on turbo trainers for people to try them.

dw300

Why did none of those bikes fail at the rear dropout where the max stress of riding while clamped in a turbo would be?

Surely carbon flexes more than enough to dissipate the stresses?

Also, with a wheel in the frame wouldn't it be strong enough that some of the force goes into making the turbo flex.

narbs

cougie wrote:

http://cyclingweekly.media.ipcdigital.co.uk/11141/000005b67/09cb/tdf11st2-Team-Sky-warm-Up.jpg

http://i1.ytimg.com/vi/Q8XB2exjRKg/maxresdefault.jpg

http://acnbpd2012.files.wordpress.com/2 ... 010750.jpg

http://i1.ytimg.com/vi/DpADqNybDMM/hqdefault.jpg

http://www.radioshackleopardtrek.com/si ... G_8710.JPG

http://cdn.media.cyclingnews.com/2011/0 ... 09_600.jpg

http://static.guim.co.uk/sys-images/Spo ... d--008.jpg

http://ww1.prweb.com/prfiles/2011/08/02 ... 20team.jpg

http://cdn2.media.cyclingnews.futurecdn ... g_8786.jpg

Can we put this urban myth to bed now ? ALL the teams warm up on turbos. Would they do that if there was the slightest chance that their bikes would shatter into a million pieces in the actual race ?

Buckles - are you for real ? I've broken two seatposts. Snapped two chains. Broke a rim. Umpteen spokes. Broken a saddle rail.
None of which happened on my turbo.

You have been taken in. If you know what to look for those pictures show steel bikes which have been disguised as the carbon race versions.

Both my race bike and turbo trainer are in the same room. I won't be riding the race bike anymore I can tell you.

smoggysteve

narbs wrote:

cougie wrote:

http://cyclingweekly.media.ipcdigital.co.uk/11141/000005b67/09cb/tdf11st2-Team-Sky-warm-Up.jpg

http://i1.ytimg.com/vi/Q8XB2exjRKg/maxresdefault.jpg

http://acnbpd2012.files.wordpress.com/2 ... 010750.jpg

http://i1.ytimg.com/vi/DpADqNybDMM/hqdefault.jpg

http://www.radioshackleopardtrek.com/si ... G_8710.JPG

http://cdn.media.cyclingnews.com/2011/0 ... 09_600.jpg

http://static.guim.co.uk/sys-images/Spo ... d--008.jpg

http://ww1.prweb.com/prfiles/2011/08/02 ... 20team.jpg

http://cdn2.media.cyclingnews.futurecdn ... g_8786.jpg

Can we put this urban myth to bed now ? ALL the teams warm up on turbos. Would they do that if there was the slightest chance that their bikes would shatter into a million pieces in the actual race ?

Buckles - are you for real ? I've broken two seatposts. Snapped two chains. Broke a rim. Umpteen spokes. Broken a saddle rail.
None of which happened on my turbo.

You have been taken in. If you know what to look for those pictures show steel bikes which have been disguised as the carbon race versions.

Both my race bike and turbo trainer are in the same room. I won't be riding the race bike anymore I can tell you.

So, you are telling me that in 2012, when I was watching Phillipe Gilbert warm up on his turbo and then unclip it(with the aide of the team mechs) and then proceed to the start line of the Amstel gold race he rode on a mocked up steel bike? you can come out with all the conspiracy crap you like but when I go to pro races and see the riders warming up on thier race bikes moments before starting I know what I am more likely to believe.

imposter2.0

I think narbs is being humorous..

If not, then aliens really have taken over the bicycle industry...

narbs

Imposter wrote:

I think narbs is being humorous..

If not, then aliens really have taken over the bicycle industry...

I didn't think I was being particularly subtle either

StillGoing

Buckles wrote:

You will find it in the small print of most carbon bike owner's manuals.

Nope nothing with my Basso or Dolan which are both carbon. This claim is absolute horsesh1t.

BillyMansell

dw300 wrote:

Why did none of those bikes fail at the rear dropout where the max stress of riding while clamped in a turbo would be?

Good point. Much of the finite element analysis that focuses on the rear of the frame tends to focus on the torsional forces around the bottom bracket. For anyone with access to the technology it probably wouldn't take much to model the torsional forces on the rear drop outs, seat stays and chain stays when the ear drop outs are fixed in all dimensions and with degrees of rotation to mimic the limited movement through flex of the turbo.

bahzob

Why is this thread still live? Have folks been taking an early nip of Santa's sherry?

Everyone knows carbon bikes are fine on turbos so long as you pedal in circles.

dennisn

I'm thinking that all those carbon bikes that are broken probably got wet somewhere along the line. This is a definite cause of carbon frame failure and proven by the many, many posts on this site.

Monty Dog

Been a regular on bike forums since the 1990s and worked in the trade - until this thread I've never seen anyone question whether this is a problem.

buckles

Monty Dog wrote:

Been a regular on bike forums since the 1990s and worked in the trade - until this thread I've never seen anyone question whether this is a problem.

Monty Dog

Buckles wrote:

Monty Dog wrote:

Been a regular on bike forums since the 1990s and worked in the trade - until this thread I've never seen anyone question whether this is a problem.

one unsubstantiated anecdote doesn't constitute any evidence - somebody kill this thread please

buckles

Monty Dog wrote:

Buckles wrote:

Monty Dog wrote:

Been a regular on bike forums since the 1990s and worked in the trade - until this thread I've never seen anyone question whether this is a problem.

one unsubstantiated anecdote doesn't constitute any evidence - somebody kill this thread please

Oh, I thought you were joking. There are loads of questions on this very forum about whether it's OK to use a carbon bike on a turbo, so I thought it'd be impossible for you not to have seen any