Mr Dave Posted November 28, 2006 Report Share Posted November 28, 2006 HeyHad some onza 30" carbon bars for a while now, since they came out pretty much.noticed last night...if you sit on the bike, and look at the bars, on the side facing you, the carbon has split, on each end on the top curve.....cracks going downwards, about half inch long...anyone else had this?there both in the same place each side so im guessing there not from scraping on a wall....going to break? buy new ones?TaDave Quote Link to comment Share on other sites More sharing options...
Dan6061 Posted November 28, 2006 Report Share Posted November 28, 2006 Sounds like they'll snap pretty soon.I'd advise getting some new bars, justto be on the safe side... Quote Link to comment Share on other sites More sharing options...
Mr Dave Posted November 28, 2006 Author Report Share Posted November 28, 2006 Just spoke to Adam (i think :$ at TB) and we found there 2 years old! so lasted quite well considering i weight 13stone ordered a new set great bars imo Dave Quote Link to comment Share on other sites More sharing options...
JT! Posted November 28, 2006 Report Share Posted November 28, 2006 (edited) Yeah a few of the risers snapped. There's a vid out there of someone snapping them. Edited November 28, 2006 by JT! Quote Link to comment Share on other sites More sharing options...
Shaun H Posted November 28, 2006 Report Share Posted November 28, 2006 Yeah a few of the risers snapped. There's a vid out there of someone snapping them.Think that was Kyle Hinchcliffe and they were proper fooked. Quote Link to comment Share on other sites More sharing options...
Al_Fel Posted November 29, 2006 Report Share Posted November 29, 2006 send them back to onza and get the half price replacements? Quote Link to comment Share on other sites More sharing options...
Adrian Posted November 29, 2006 Report Share Posted November 29, 2006 those carbon bars are funny, because i had a lil look at the ends and theyre just alu with only one layer of carbon, which would add about the same amount of strength as a piece of paper, and considering carbon is meant to flex, not be ridged... i mean look at carbon racing bikes, and look how thick all the tubing is, but they still flex. the carbon on the onza bars is just for looks realy Quote Link to comment Share on other sites More sharing options...
RobinJI Posted November 29, 2006 Report Share Posted November 29, 2006 those carbon bars are funny, because i had a lil look at the ends and theyre just alu with only one layer of carbon, which would add about the same amount of strength as a piece of paper, and considering carbon is meant to flex, not be ridged... i mean look at carbon racing bikes, and look how thick all the tubing is, but they still flex. the carbon on the onza bars is just for looks realy You'd think that, but the thing is that most carbon bars have a aluminium insert in the ends so they don't splinter and crack when you hit the end of your bars against things. Meaning that what you say is true about probably the first inch or two but after that they are more than likely full carbon. Quote Link to comment Share on other sites More sharing options...
Bigman Posted November 29, 2006 Report Share Posted November 29, 2006 How about getting the aluminium equivelents? i have them and love them!Adam Quote Link to comment Share on other sites More sharing options...
Oskar Posted November 29, 2006 Report Share Posted November 29, 2006 (edited) They are aluminium with a layer of carbon... Description- Arguably the best trials handlebars currently available, now even wider for more control!- Extra width, as requested by the Coustellier brothers and Danny Butler.- 31.8mm oversized clamp diameter for increased strength.- Carbon fibre outer construction.- 7075 aluminium core where high stress levels occur.- The distinctive shape of these bars offers an extremely comfortable feel and increased bike control when tilted forwards, or a slightly more 'streety' feel when tilted back.- Combination of aluminium and carbon fibre offers exceptional stiffness and strength, but not with the downside of high weight.- Aluminium inserts to prevent splintering at the ends of the bars.- 30" (760mm) wide.- Clear lacquer over raw carbon-fibre weave and white graphics give a classy finish.- 285g. Edited November 29, 2006 by Oskar Quote Link to comment Share on other sites More sharing options...
Egg Fried Rice Posted November 29, 2006 Report Share Posted November 29, 2006 argh...i was about to buy some off a mate. there about 9 months old but havent been used hard at all.should i buy them?JK Quote Link to comment Share on other sites More sharing options...
_skj0lsvik_ Posted November 29, 2006 Report Share Posted November 29, 2006 argh...i was about to buy some off a mate. there about 9 months old but havent been used hard at all.should i buy them?JKI would, if I've got'em really cheap Quote Link to comment Share on other sites More sharing options...
RobinJI Posted November 29, 2006 Report Share Posted November 29, 2006 They are aluminium with a layer of carbon... Description- Arguably the best trials handlebars currently available, now even wider for more control!- Extra width, as requested by the Coustellier brothers and Danny Butler.- 31.8mm oversized clamp diameter for increased strength.- Carbon fibre outer construction.- 7075 aluminium core where high stress levels occur.- The distinctive shape of these bars offers an extremely comfortable feel and increased bike control when tilted forwards, or a slightly more 'streety' feel when tilted back.- Combination of aluminium and carbon fibre offers exceptional stiffness and strength, but not with the downside of high weight.- Aluminium inserts to prevent splintering at the ends of the bars.- 30" (760mm) wide.- Clear lacquer over raw carbon-fibre weave and white graphics give a classy finish.- 285g. Hmm.. still not sure, it says there's an alloy core where high stress levels occurs, IE the bar ends, the clam area and the bends. So they could still be proper carbon in most of the length. argh...i was about to buy some off a mate. there about 9 months old but havent been used hard at all.should i buy them?JK Yeah, go for it. Like the guy said, his were two years old, So assuming the riding level is the same they'll still have a good year left in them. Quote Link to comment Share on other sites More sharing options...
Shaun H Posted November 29, 2006 Report Share Posted November 29, 2006 those carbon bars are funny, because i had a lil look at the ends and theyre just alu with only one layer of carbon, which would add about the same amount of strength as a piece of paper, and considering carbon is meant to flex, not be ridged... i mean look at carbon racing bikes, and look how thick all the tubing is, but they still flex. the carbon on the onza bars is just for looks realyAs mentioned above many carbon tubes have an aluminium core or at least an endoskeleton. Carbon is incredibly stiff in the direction of it's weave but it also has very good shock absorbing qualities which may be where you got the flexing thing from? Cos I'm pretty sure "meant to flex" couldn't be farther from the truth (don't bite my head off if I'm wrong).The carbon on the bars is not "just for looks" either... It's proper carbon fibre and adds alot of strength (certainly more than a piece of paper )without the weight penalty.argh...i was about to buy some off a mate. there about 9 months old but havent been used hard at all.should i buy them?JKYES. Quote Link to comment Share on other sites More sharing options...
Oskar Posted November 30, 2006 Report Share Posted November 30, 2006 Hmm.. still not sure, it says there's an alloy core where high stress levels occurs, IE the bar ends, the clam area and the bends. So they could still be proper carbon in most of the length.We need to saw a set in half to find out Quote Link to comment Share on other sites More sharing options...
RobinJI Posted November 30, 2006 Report Share Posted November 30, 2006 Haha, yeah, anyone up for it? Kinda interested to know now.... Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 30, 2006 Report Share Posted November 30, 2006 Did it a fair few months back... the high stress areas are at the bends and the stem clamp. As you can see, the thickness increases dramatically at these points!The ends are relatively thin (under the grips) as there's not a lot happening there.The marks you can see on the long section are from where we tried to crush the bars in a vice (didn't really work) and then try and snap them by swinging on the other end of the handlebars - almost broke the vice!The two areas where the carbon has pulled away from the alloy (and we've cut the bars in half along their length) is what appears on the outside as a 'crack' in the bars - it is in fact just the carbon delaminating a little when the bars flex to absorb shock.[attachmentid=8457] Quote Link to comment Share on other sites More sharing options...
RobinJI Posted November 30, 2006 Report Share Posted November 30, 2006 Ah, cool, so looks like they are aluminium sleeved all the way down the length.They seem very good bars, and I don't doubt how the carbon layers would improve the strength. Quote Link to comment Share on other sites More sharing options...
joe b Posted November 30, 2006 Report Share Posted November 30, 2006 That's a bloody long life for a pair of caron bars . I hope mine last that long... Mind you, i'm only 9 stone .Cheers,Joe. Quote Link to comment Share on other sites More sharing options...
Ali C Posted November 30, 2006 Report Share Posted November 30, 2006 only I am 10 stone and 22 years old.anyway, onza bars are cool, but the shape isnt for me Quote Link to comment Share on other sites More sharing options...
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