Quantcast

Frame crack...give it to me straight doc

kidwoo

Artisanal Tweet Curator
all this talk about cracks and nobody has suggested a yeti? yeesh come on people
You rang?





For udi: the above is "joke" which is based upon a concept called "humor". Sometimes using this concept means one employs hyperbole or exaggeration to over emphasize a point. It's common in the human race. Humans are a form of primate that are capable of another concept called "laughter".
 

troy

Turbo Monkey
Dec 3, 2008
1,008
742
If you do not have acces to an ultrasound, then try the sound test - tap the frame around the mentioned area and the opposite site. If You hear a difference (dead sound, no vibration in the "crack zone"), then it has most likely cracked, just waiting to explode on you.

Example:
 

Sandwich

Pig my fish!
Staff member
May 23, 2002
21,077
5,990
borcester rhymes
If you do not have acces to an ultrasound, then try the sound test - tap the frame around the mentioned area and the opposite site. If You hear a difference (dead sound, no vibration in the "crack zone"), then it has most likely cracked, just waiting to explode on you.

Example:
No Ultrasound, and honestly I'd wager the cost of the test would be close to the cost of the replacement front triangle...so I bought it. Nice to have as a backup and maintains some level of resale vs a cracked frame which is valueless.

the crack itself is pretty clearly in the clearcoat/epoxy of the frame. You can shine the flashlight sideways and see that it stops before the carbon. It's wicked thick and pretty shitty- I put a few other marks in it when assembling the bike. Once when the shock fell over and the piggyback nicked the downtube, and another one around the headtube where somebody looked at it wrong. I sprayed some additional clearcoat over the top of this crack and will watch it to see if it grows. I'm willing to bet that it's a non-issue.

I need an Earth Based Kickouts tee.

OP- consider a Jamis
Thanks, it's either that or a BH.
 

Jeremy R

<b>x</b>
Nov 15, 2001
9,698
1,053
behind you with a snap pop
I had one buddy break FIVE Giant Anthems. FIVE. All warrantied.

I've personally broken Mongoose, Norco, Turner, Transition and Avanti frames. And bent one chromoly Giant BMX. One day I'll learn to bend my knees when I land.
It is interesting to see what other people have broken over the years.
Over the years, I broke an Intense M1 3 times at the chain stay. I cracked one Turner DHR at the shock mount and was taken care of right away. I cracked the chain stay of an Sx trail that I did not know about until I sold it. Doh. I never broke any of my Transition frames, but I never kept one for a real long time either. And our team has had great experiences on all the Norco frames we have owned. Their newer models seemed to be built tough.
Out of all these years, the only frame company we ended having to walk away from was Yeti. We loved their bikes and only had two issues with their frames, but they were both denied warranty to guys who were out there racing their ass off for them under their grassroots program. Bye Girl.
 

kidwoo

Artisanal Tweet Curator
A friend of mine cracked a headtube on a plastic giant glory less than a year old by hitting a compression with a rock. Didn't crash just ran into rough line. Giant wouldn't warranty it. Seemed uncharacteristic but scared me off the brand. I've gotten cracks in specialized, norco, and turners, all taken care of right quick.
 

Katz

Monkey
Jun 8, 2012
371
788
Arizona
It's the thing with the bad seat tube angle and"dw" plastered on the side

I think it's Spanish
We have a younger guy riding a Lynx 4.8 in our little hick town. Too pedestrian, try harder.

Headtube area looks pretty robust, though.
 

rideit

Bob the Builder
Aug 24, 2004
23,342
11,511
In the cleavage of the Tetons
A friend of mine cracked a headtube on a plastic giant glory less than a year old by hitting a compression with a rock. Didn't crash just ran into rough line. Giant wouldn't warranty it. Seemed uncharacteristic but scared me off the brand. I've gotten cracks in specialized, norco, and turners, all taken care of right quick.
That being said, in the ten years that I owned a shop, Giant was the BEST about no questions asked warranties.
I consistently sent the warranty manager bottles of JD, though, and I am pretty sure he was an alcoholic.
This was before plastic dh bikes, tho
 

kidwoo

Artisanal Tweet Curator
I think of giant like the other big 2, usually good with that stuff since they'd be out of business if not, especially trek. That was a wierd one. Especially since it was obviously not crash related. Their reasoning was something stupid like "our bikes don't fail like that so since it did you were obviously riding it in a manner not intended". It's a fuckin dh bike.
 
Last edited:

toodles

ridiculously corgi proportioned
Aug 24, 2004
5,512
4,762
Australia
That being said, in the ten years that I owned a shop, Giant was the BEST about no questions asked warranties.
Yep same. I've seen no-questions asked replacements on Giant bikes that had been clearly thrashed and abused beyond anything they were designed for. Just straight up replaced, no worries. One guy even got a whole new bike off them for his cracked frame because they didn't have any 26" frames left so they got him up-specced to 650B model.
 

toodles

ridiculously corgi proportioned
Aug 24, 2004
5,512
4,762
Australia
I know right? I used the word uncharacteristic for good reason.
Still worth pointing out that even without a warranty replacement on the first frame, you could buy a second one and still have spent less than buying a lot of other brands.

Seen 3 yetis snap - none warrantied. All "crash" damage, even when the top tube buckles on a landing.
 

Sandwich

Pig my fish!
Staff member
May 23, 2002
21,077
5,990
borcester rhymes
I looked up bh mountain bike and found ebikes.

Given 98% of carbon mountain bikes qualify as cheap Chinese shit, you seem to consistently hone in on the cheapest and chinesiest and shittiest
nice

to be clear- I was fucking around with the BH...but here's this to haunt your dreams/knees:



FWIW the BMC is a pretty decent bike. kinematically it's superior to 90% of what's out there: http://linkagedesign.blogspot.com/2016/03/evil-wreckoning-2016.html It's not far off from the wreckoning without the wack (when paired with an air shocK) progressive bottom out. In fact, it's about as close to a DW link bike as you can get without getting your lawyer wet. Geometry wise it's a bit steeper and shorter than more modern bikes, but also longer and slacker than a lot of frames from last year. Frame is super light, all of which makes it a great trail bike, but maybe not an enduro-bro-goggles/halfdome/fannypack bike.

I honestly don't know what I'd replace it with...that funky Forbidden druid or the GG troll pistol, but I'm looking at spending 3gs on either, and I'd have to convert my rear hub, crank, and ditch my shock just to run it.
 

slimshady

¡Mira, una ardilla!
nice

to be clear- I was fucking around with the BH...but here's this to haunt your dreams/knees:



FWIW the BMC is a pretty decent bike. kinematically it's superior to 90% of what's out there: http://linkagedesign.blogspot.com/2016/03/evil-wreckoning-2016.html It's not far off from the wreckoning without the wack (when paired with an air shocK) progressive bottom out. In fact, it's about as close to a DW link bike as you can get without getting your lawyer wet. Geometry wise it's a bit steeper and shorter than more modern bikes, but also longer and slacker than a lot of frames from last year. Frame is super light, all of which makes it a great trail bike, but maybe not an enduro-bro-goggles/halfdome/fannypack bike.

I honestly don't know what I'd replace it with...that funky Forbidden druid or the GG troll pistol, but I'm looking at spending 3gs on either, and I'd have to convert my rear hub, crank, and ditch my shock just to run it.
Where are you located and what bike size do you own currently?
 

Sandwich

Pig my fish!
Staff member
May 23, 2002
21,077
5,990
borcester rhymes
The orbeas appear to have good kinematics with a nice simple single pivot. They don't appear to be too cheap here in the us. I'm mostly goofing on EU brands since that's what I ended up with. I don't think there's much difference between the BMC and anything else coming out of the far east. These frames have a penchant for cracking (that's how I got mine) but usually on the rear end.

I dunno, it checks all the boxes and there isn't much that really makes me want to stop riding it, except for a few cracks here and there
 

slimshady

¡Mira, una ardilla!
As I thought you were EU based I suggested the Rallón because I saw several ones go really cheap in Spain and France (I am a member of a Spaniard forum). I realize they go a bit pricey across the pond.

Havign said that, I'd say you do those tests suggested earlier in the thread, sand the coating down a bit, re-pain that zone and ride the shit out of the frame. Start savig for a new one and maybe a new rear hub and crankset in the meantime.
 

rockofullr

confused
Jun 11, 2009
7,342
924
East Bay, Cali
put a few dings in it simply building the fucker up
whacking it with a wrench
I'm late to this thread.... So you bought a BMC, beat the shit out of it with a wrench and now you're surprised that it's borked?

The orbeas appear to have good kinematics with a nice simple single pivot
Pretty sure I broke a Rallon just jumping up and down on it during a bike demo.
 

Sandwich

Pig my fish!
Staff member
May 23, 2002
21,077
5,990
borcester rhymes
I'm late to this thread.... So you bought a BMC, beat the shit out of it with a wrench and now you're surprised that it's borked?



Pretty sure I broke a Rallon just jumping up and down on it during a bike demo.
I massaged the headtube very gently with a hard piece of aluminum, I think. Just wanted to bend it back into shape
 

Sandwich

Pig my fish!
Staff member
May 23, 2002
21,077
5,990
borcester rhymes
Not the preferred nomenclature?



How's that working out for ya?

This is your backwards seatpost thing right? No warranty or anything? I'm with some of the other folks here, just get the thing fixed at a carbon repair place.
No, I stepped out of retardsville when I got rid of the evil. This bike has a normal seat angle, and therefore I can run my seatpost like an adult in the correct direction

Other than a little too much travel and not being very resistant to playing xylophone, the frame has been great. It's pretty much ideal, if not a little squishy (and cracky)