koen
New Questions.......
Posts: 3
|
Post by koen on Mar 30, 2009 8:49:33 GMT
Sorry that your worries came true....just another bad batch I think. Glad to hear Formula Bike gave a very good service , two thumbs up ! I wonder if the cracking issue also happened to the seat stay ? Mine is an aloy/carbon rear
|
|
|
Post by Yetifet on Apr 8, 2009 2:56:25 GMT
Sorry to hear that somebody else has suffered with cracking stays! There has got to be something in this. Now my yeti has the alloy /carbon rear end I could not be happier. But I think this issue still needs to be addressed by Yeti incase some poor swine has it fail during a big drop off or such. Blaming a dodgy batch is not the answer.
|
|
na
a true Yetifan!
Posts: 166
|
Post by na on Apr 8, 2009 7:44:07 GMT
I personally think the design of the bike is fine, either in alloy or carbon fibre. The stress analysis will have been done and the carbon fibre version is easily strong enough.
The problems are more than likely in manufacture, probably down it attention to detail, carbon fibre sheet is very fragile and needs to be cut very carefully, F1 teams use a ZUND cutting table to cut their sheets (about £80k - McLaren even had theirs custom painted in white to match the build, an extra 8k from what I hear). The sheets need to be store in a freezer and used and in the mould within 90 mins of coming out of the freezer. If you drop it the sheets is knackered, if bend it aggressively this can also cause the sheet to be damaged, you can't see the damage either.
It is this difficult material to work with that is more than likely the cause of the failures, YETI are not alone in this SCOTT, Cannondale etc all have the same issues. I have heard that one factory doesn't even store the Carbon in freezer but it is kept at room temperature, I don't work with the stuff so I don't know the exact consequences of this but it all in the detail and if you ignore the basics the product suffers. We all know that what the guys from YETI see at the factory when they visit is one thing and what goes on behind closed doors is another, the worry is how big is the difference and how many corners are cut by the vendor.
anyway enough of me banging on, Carbon is probably going to be the "asbestos of the 21st centuary" anyways - Big Ian quote...
|
|
|
Post by Gaggo on Apr 8, 2009 12:36:15 GMT
Looking at your photos, it looks the same as happened to my 575 in almost the same circumstances. Bought last late September and broke 6 weeks later at Glentress. I took my bike back to the shop on Monday and was back out on it on the Wednesday. However i asked them to replace the carbon part with an alloy one, which has been spot on since. All under warranty, not happy about the snapped swingarm but the service to get me back out was excellent.
|
|
|
Post by jonnybez on Apr 8, 2009 22:12:29 GMT
Fellow Yetifans. It is with regret to say that I appear to have done it again. I am starting to feel this bike is cursed. After my last unfortunate incident, I now routinely check the rear after every couple of rides. This time I managed to catch the breakage before a catastrophic failure. This time it has gone on the non-drive side. Very similar to XTo's failure. The trail was Cwmcarn Twrch XC loop after having ridden the Bristol's Ashton Court Timberland trail the day before. All my riding buddies own Santa Cruz bikes. You can not imagine the amount of stick I am getting after a second breakage. I am now known as the one with the cheap plastic bike. And my Yeti has become a laughing stock. Not a very dignified Position for such a prestigious machine. The frame is going back up to the dealer on friday. Lets see what happens this time. Wish me luck!!!!!!!!!!
|
|
na
a true Yetifan!
Posts: 166
|
Post by na on Apr 9, 2009 7:07:29 GMT
Do your buddies have Mk1 Nomads? If so get them to check the eyelet in the top tube where the swing link attaches, they pull out on a regular basis!! Mk2 has been changed for this reason, if your buddies are unlucky you might not get as much stick, truely shocking luck fella!
|
|
|
Post by jonnybez on Apr 9, 2009 7:42:49 GMT
I am not that fortunate. They either ride the 2008 Heckler or the Blur LT. Rock solid build, Ultra reliable, but everybody has one. I was trying to be different and a little more sophisticated.
|
|
|
Post by Bobthebuilder on Apr 18, 2009 20:59:48 GMT
I went on the test the best demo day at Carron Valley recently and my mate and i tested a S Works Carbon Epic. My mate had a massive crash over the big jumps near the end and the bike didnt have a mark on it. The same cant be said for him though. His knee was in pieces. But it just goes to show that carbon can take a big hit. And that was on a XC race bike that isnt even designed to take big jumps. so a yeti that is designed to take a pounding will be fine but obviously there are exception.
|
|
|
Post by Andrew on Apr 18, 2009 21:15:58 GMT
this is interesting, Mine as I've said before is a 2008, the first one, its been great and I really have tried to rag the crap out if it!!
On mine there is a white number printed under the stays, it says 8001.
Can anybody tell us the number on theirs and if you broke it?
|
|
xto
New Questions.......
Posts: 9
|
Post by xto on Apr 20, 2009 7:34:20 GMT
Yes, mine says 9001...Now I know what it stands for. Andrew's 8001 stands for 2008 production,mine is 2009 team colour production. What about your's Bezzy??? Emailed Sarah(Yeti cycles customer dept) on the 14th April and still am waiting for her to reply yet.
|
|
lukew
Call me Mr YETI
Posts: 46
|
Post by lukew on Apr 20, 2009 13:42:03 GMT
"my mate and i tested a S Works Carbon Epic. My mate had a massive crash over the big jumps near the end and the bike didnt have a mark on it. The same cant be said for him though. His knee was in pieces. But it just goes to show that carbon can take a big hit."
No. This is where everyone is getting their wires crossed. This goes to show that your mate's knee can take a big hit and the bike got off lucky.
I have had huge crashes where the bike comes out as new. But I've also crashed and totalled bits on my bike, while I am walking away nothing more than a little dazed.
Carbon is a safe material to build bikes with just as long as it is done well. But just like any material if it get smacked by a rock, stump or something else on the trail it will damage/break.
My ASR alloy has got a huge dent in the downtube from a rock that hit it. It would not have taken a whole lot more for the rock to puncture through the frame and now I am not entirely sure how safe it is to ride.
Now should my frame disintegrate, just because my frame got hit by a rock, I am not going to go cry about it. If Yeti were to make their XC and trail frames thick enough to deal with unlucky moments like these then they'd be weighing in at 8lbs instead of 5.
If you don't want to take such risks or are a clumsy rider or you regularly crash, think about buying a different bike. Yeti's were not designed to be smashed down the trail, they were designed to be ridden. If you mess up, that is your own error. Don't be a chump and blame it on the weak bike that couldn't take your riding 'style'.
|
|
|
Post by fatblokefromwarwic on Apr 21, 2009 17:14:00 GMT
Mmmm...... confused now as the white number under my late 2008 575 chainstay says 8025
|
|
|
Post by Andrew on Apr 21, 2009 17:21:09 GMT
must be batch nos, mine was the very first sold 575 in the UK for the 08 range.
|
|
|
Post by fatblokefromwarwic on Apr 21, 2009 18:17:49 GMT
lol, can you tell how tired i am !
never figured 8001 to 8025
only me
good night
|
|
guido1
Call me Mr YETI
Posts: 16
|
Post by guido1 on Apr 21, 2009 18:45:03 GMT
mine says 8002. not broken yet....
|
|