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  1. #1
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    ASR5 cracked rear swingarm , after 3 months of use

    You judge , this ASR5 was bought in April 24, 2013 and assembled in early May 2013 , my 14 year old son used it in XC use and light enduro (he doesn't jump nor its a radical rider, by far) please check the bike , its new, no falls, nothing , and this is the result after 3 months of weekend use.
    Matt of Yeti says the reason of this is because we used a rear brake rotor of 203 mm instead of the maximum 185 mm they say (singe piston calipers). In other words, if you use a brake rotor that is 9% bigger, the widest part of the rear carbon swing arm breaks with this bike ..... nice safety factors of this bike (I've seen many other triangles craked on the web of these ASR5 , ¿ were they using 203 mm rotors ? , I bet you $ 5.000 that not , even today I saw a cracked SB66 in this same forum) ... so they void my warranty and I'm stuck with a broken Yeti ... nice for Yeti , with international customers... what is for a company that sells thousands of bikes to cover a customer (I have 2 Yetis) what is something they know exists as a failure of thier productive line ?? Nothing, but they hung on this cheap technical gig of the brake rotor... I'm off the Yeti tribe. Bad Bad attitude.
    When I bought Yeti I thought I was buying quality and warranty, they just went the way of a cheap excuse ...

    PS: I went to talk to a shop where the guy in charge has been latinamerican DH champ , having ridden DH and now Enduro for 20 years , and he says by far this ain't the reason.
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  2. #2
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    Sorry dude, that sounds like a lame excuse to me. I agree that they should cover this failure. How much does a new swingarm cost?

  3. #3
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    Quote Originally Posted by Salt Yeti View Post
    Sorry dude, that sounds like a lame excuse to me. I agree that they should cover this failure. How much does a new swingarm cost?
    Hi how are u ? To mee too ... the new swingarm (if ever YETI has it) the local dealer offered it to me for US$ 380 "crash package" ... Imagine how I feel if 3 months ago I paid US$ 799 for this frame @ DEpt. of Goods. com .... (50% of the frame cost would go with this issue) ...

  4. #4
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    Sorry to hear about your frame...... But why on earth would you put a 203mm rear break rotor on a 5 inch trail bike?

  5. #5
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    Quote Originally Posted by jpvm View Post
    Imagine how I feel if 3 months ago I paid US$ 799 for this frame @ DEpt. of Goods. com
    I imagine you feel like you wish you had followed the rotor size they recommended? Without being a physicist it's still easy to see that the huge brake caliper adapter acted like a lever, creating forces way beyond what the frame was designed for. Live and learn, buy a new rotor and adapter when you get the rear triangle and the bike should be fine.

  6. #6
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    Quote Originally Posted by Fat Fingers View Post
    Sorry to hear about your frame...... But why on earth would you put a 203mm rear break rotor on a 5 inch trail bike?

    It's just a kid, he bought it and installed it .... but this doesn't justify that if the Yeti web page indicates (now I know) a max rotor size of 185 mm and you install a 203 mm one it'd brake the swingarm. The use of this bike is not radical , he weighs like 135 lbs ... I've seen ASR5 riders of 200 lbs with 180 mm rotors braking like they0ve stopped the world and this is bay far more stresssing....

  7. #7
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    yeah, that sucks. isn't department of goods part of the competitive cyclist conglomerate? do they offer the lifetime satisfaction warranty? could be one other option?

  8. #8
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    Bummer, but it states right on Yeti's website that the largest rotor that frame takes is 185mm.

    ASR-5 FAQ section:

    Yeti Cycles / Home
    I'd hit it, but I bruise like a peach.

  9. #9
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    Quote Originally Posted by bpnic View Post
    Bummer, but it states right on Yeti's website that the largest rotor that frame takes is 185mm.

    ASR-5 FAQ section:

    Yeti Cycles / Home
    That's the only argument YETI uses , but ok, you think if you put a 9% bigger rotor it should brake apart after 3 months ? What happens if I mount a Shimano Saint brake w/double piston caliper and produces 20 or 30% more stopping leverage, it should brake the complete frame ? Or a rider that is 50 lbs heavier than my son ?

    Something is wrong, a design cannot brake with such a minor details after this short time, what kind of safety factor is this ? Some frames brake after some time (fatigue) , but not a 3 month old bike used on weekends by a 14 year old kid ....

    Many frames have been exchanged by YETI , broken ASR5s , and those were not using 203 mm rotors ... in fact YETI was about to accept the warranty claim but when they discovered the 203 mm rotor , they denied (185 mm accepted ... 203 mm brakes the bike...nice resistance..)

  10. #10
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    Quote Originally Posted by jpvm View Post
    Hi how are u ? To mee too ... the new swingarm (if ever YETI has it) the local dealer offered it to me for US$ 380 "crash package" ... Imagine how I feel if 3 months ago I paid US$ 799 for this frame @ DEpt. of Goods. com .... (50% of the frame cost would go with this issue) ...
    The only reason that $380 seems like a lot is because you paid so little for the frame. $799 is nowhere near the original retail vaule of the ASR5. You should be thankful that there is a crash replacement option in place that offers you a fair price on a replacement rear triangle.

  11. #11
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    Re: ASR5 cracked rear swingarm , after 3 months of use

    I'm sorry for your situation but I gotta say, $380 is not a bad price. That frame was originally well over 1,500 dollars if I remember correctly. You just got one for a screaming deal. I would pony up the dollars and put a proper rotor on it. Although the 203 millimeter rotor may only be 10 percent larger in diameter.... I believe that as you move further and further away from the center of the rotor the braking forces become exponentially larger. There's a reason that in the manual it states a max rotor size, whether or not that large rotor is truly the cause of failure I cannot say. You seem to give the impression that there are many many failures in the same spot, I have no way of verifying that.

  12. #12
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    I can't deny the deal on the ASR frame price, but this doesn't justify the swingarm brakes after 3 months (and only weekends) .... even people that buy a US$ 800 LED TV set would scream it it burns after 3 months ...

  13. #13
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    Re: ASR5 cracked rear swingarm , after 3 months of use

    Quote Originally Posted by jpvm View Post
    I can't deny the deal on the ASR frame price, but this doesn't justify the swingarm brakes after 3 months (and only weekends) .... even people that buy a US$ 800 LED TV set would scream it it burns after 3 months ...
    So **** happens. Here's what you do since you obviously will never be happy with the bike again. Buy the swing arm and then sell the frame, you can get what you paid for it and wash your hands clean of the whole thing.

  14. #14
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    Quote Originally Posted by eatdrinkride View Post
    I'm sorry for your situation but I gotta say, $380 is not a bad price. That frame was originally well over 1,500 dollars if I remember correctly. You just got one for a screaming deal. I would pony up the dollars and put a proper rotor on it. Although the 203 millimeter rotor may only be 10 percent larger in diameter.... I believe that as you move further and further away from the center of the rotor the braking forces become exponentially larger. There's a reason that in the manual it states a max rotor size, whether or not that large rotor is truly the cause of failure I cannot say. You seem to give the impression that there are many many failures in the same spot, I have no way of verifying that.
    I am engineeer and certainly the leverage or momentum induced by the brake caliper on on the rotor on the pivot point is linear , Force * radius of the rotor; if radius is 9% bigger , so will be the momentum. And the momentum transmits itsel on the frame via the upper tensors, the swingarm is under tension and flex due to the self weigth of the bike, the weight of the rider and mass forces of jumps...

    Cracked swingarms,m just google them , to name a few :

    cracked rear triangle on my ASR5

    Yeti ASR 5C cracked rear end | YETIFAN.com FORUM
    Do I need to worry about... (Yeti content) « Singletrack Forum
    BikeRadar.com ? View topic - yeti asr 5 issues
    Yeti 575 broken carbon rear triangle [Archive] - Bike Magic Forums

    were all these guys using a larger than 185 mm on the rear ??

  15. #15
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    Quote Originally Posted by eatdrinkride View Post
    So **** happens. Here's what you do since you obviously will never be happy with the bike again. Buy the swing arm and then sell the frame, you can get what you paid for it and wash your hands clean of the whole thing.
    Not a bad idea , I've thought about it, but my son loves the ARS5 ... I have an ASR7 and also love it ... I don't like the WAY Yeti Cycles got rid of me ....

  16. #16
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    Quote Originally Posted by smithcreek View Post
    I imagine you feel like you wish you had followed the rotor size they recommended? Without being a physicist it's still easy to see that the huge brake caliper adapter acted like a lever, creating forces way beyond what the frame was designed for. Live and learn, buy a new rotor and adapter when you get the rear triangle and the bike should be fine.


    Ps, I Found that the 185 mm rotor size fact is in the FAQ partof Yetis web page and not in the bikes user manual, so its even weaker argument of YETIS disclaimer.....

  17. #17
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    Update , sent the rear swingarm to an aircraft certified carbon fibre specialist (works with carbon aircraft, helicopters, cars, etc.) since Yeti didn't cover me due to its failed design. The repair will cost me almost US$ 200 ... the cracked swingarm repaired and reinforced for life keeping the geometry, thickness and gaining some extra resistance.
    The rear triangle is really very light , it weighs nothing , I think its too light for a trail / all mountain bike, too fragile ... the pivots and bearing housings are good but the general finish is very delicate , so these bikes' carbon part looks to be short lifed ...








  18. #18
    DLd
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    Hopefully you'll use some of the money you saved to buy a 180mm rotor and adapter so it doesn't happen again. That big honkin' 203mm adapter has quite a lever arm.
    "Great things are not accomplished by those who yield to trends and fads and popular opinion."-Jack Kerouac

  19. #19
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    Update on ASR5 after repairing the rear swingarm locally ...

    Repaired Swingarm
    New Deore 2014 Brakes
    New 183 mm Hope rotors
    New XT plus shifters
    New XT shadow plus rear derraileur
    New 42T rear xT casette + Sram Chain

    Let's pray to God...
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  20. #20
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    If I were you I would run a 160mm rear disc. Nearly all breaking power goes into front brake and I don't think you need 180 on this bike.

  21. #21
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    FF: Depends on how long the downhills are ... I found 160's fine on the back until I got beyond about 1-2 mile long downhills when I encountered the evil fade. Moving to larger (or better, or both) rotors solved my issue. Sure, I could brake less but I'm not confident going over 30 mph on some trail.

    JPVM: "locally fixed" carbon?

  22. #22
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    Looks like they did a nice job.

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    Something doesn't add up here. I own an ASR5, weigh 225# and ride the HELL out of it. Two full seasons on it and no issues what so ever. I run 180mm rotors front and rear and often brake very hard- although mostly with the front while leaning back over saddle. Rear braking is more for control. Why would a teenage kid need a 203mm rotor on the rear for xc riding anyways?

    DId you buy it from an authorized Yeti dealer? I think Yeti's warranty might also say it's void if bike is not built by an authorized dealer. Not sure on that though. Could it have sustained some shipping damage that went un-noticed?

    While it may sound like a lame excuse, if Yeti states max rotor size 185mm then it is what it is. Your dealer should have told you no go on the 203mm, or did you just buy the frame. ASR is an XC/trail bike not a DH bike. Many forks also have stated max rotor sizes.

    I had a car at one time that I installed an aftermarket air intake on. After installing it I found out that it would void the engine warranty. Guess what I did- I removed it.

  24. #24
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    Interested to see pictures of actual repaired area. I have a 575 all carbon rear that is cracked.

  25. #25
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    Quote Originally Posted by bear View Post

    JPVM: "locally fixed" carbon?
    I live in Chile, Southamerica , today I got the swingarm repaired by a guy that is specialized in carbon fibre repair.

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