COBE rear bumper on pro
- Thread starter snopro_ac
- Start date
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snopro_ac
Well-known member
carbon is strong as heck, but that little nob on the mud flap seems to put isolated pressure in one spot constantly when the flap is laid back, so any time in deep snow, that creates a crack and evenually snaps, that's just my thoughts on it, a person could remove that nob on there but the reports i've read say the carbon is so slippery when it's wet that it's hard to get a hold of, i'm going to order the cobe and forget about the carbon bumper, the person who gets my sled next year will have a brand new carbon bumer on it.
So, first ride the rear bumper busted on one side during a tail walk(between the bolts like all the rest). And second ride, the front bumper tweaked bigtime, twice not just once! But the sled runs great. Coming off a programmed D7/155, I can say they're in completely different leagues. Now just to find the right bumpers to take the abuse I find.
C
Clarke673
Somewhere between too dumb to quit and flat earth
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snopro_ac
Well-known member
yup i'm lucky so far, belts aren't so cheap anymore either.
Hey Snopro,
I have shipped about a 100 or so bumpers over the last couple season, and have yet to hear of any issues, not saying that there are not any or will be, but that so far I have not had any negative feedback on them. I have been following this thread to see if anyone has had one fail.
I could make the slide plates thicker however I am concerned that the stronger I make the bumper the more it would damage the tunnel. I would rather replace a $20 bumper side plate or one of the tubes than a $1000 tunnel. I have ran analysis on it and designed to meet the requirements of lifting a sled with a large factor of safety. Also designed it for aesthetics, to meet a price target, purpose by having the snow flap bar, and to be modular to keep shipping plus easier for replacing parts. It is stronger than the Pro version and the older 07-09 version. However, I never did analysis on using a snowbungee.
Obviously going to a aftermarket tunnel or what AKSnowrider is making would be the stronger solution but also quite a bit more expensive.
Please feel free to PM for any other questions or concerns.
Thanks.
John
BTW, here is one that I did for "Smasher" of Boondockers movie and Team Summit...
So i had to dig this exact sled out all weekend in waist deep pow, and yes the COBE bumper is freaking awesome. WAY better than stock.
I blew mine into about 5 different pieces today.... My brothers sled broke a crank and I had to pull him out. We were way back in some pretty deep snow. Needless to say it was a serious pain. I was using a snowbunji and we were going up a small hill, I hammered the throttle on the turbo and the next thing I know it really started haulin.. Well he watched the bumper break apart and go flying it snapped just below where the bolts in the bumper go. The parts that are mounted to the tunnel are the only thing left.
Not bashing at all. I am probably going to replace it with another one. It really was a load, too much of a load to put on the bumper so I am blaming it on operator error.
Not bashing at all. I am probably going to replace it with another one. It really was a load, too much of a load to put on the bumper so I am blaming it on operator error.
The properties of carbon fiber make it very strong but yet lightweight...however it is strong in a compressive and tensile way...not so much when a shear load is placed on it. This would explain why they are breaking due to the nub from the snowflap pushing right on the middle of it. Or...pulling another sled with a flap/snow bunjie attached to it...Really? No wonder it broke!
