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Yes, the frame is broken in half. in exactly the same place as seen in post number 260.
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Here we go again. It's unbelievable that this keeps happening to new frames. I believe this started in 2013.
Thanks Yan |
It goes back even farther. The original batch of frame failures had manufacture dates as early as September 2011. Yikes.
https://www.ternbicycles.com/us/fram...acement-notice |
Vektron is a mid-drive ebike. What were the chances that Tern's folding frame would snap with a motor on it? ---> 100%
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Originally Posted by towatai
(Post 21180529)
Yes, the frame is broken in half. in exactly the same place as seen in post number 260.
1. your height. 2. your weight 3. riding surface in your area 4. bumpy? 5. smooth? 6. luggage? backpack, pannier(s), front bag, or? 7. typical weight of luggage 8. total mileage of your P9 ps, if you answer each question individually - you'll have enough posts to upload pics. :) |
1,83m
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90kg
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mostly good, smooth asphalt
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luggage only a backpack with a max load of 3kg-5kg.
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mileage is currently pretty much 4900km
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Thanks!
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Originally Posted by towatai
(Post 21180498)
Hello from Germany. Yesterday my Tern Vektron P9 broke down. Fortunately not during the drive but when starting at a traffic light. I bought it on november 15th last year. I am curious what my dealer will say on the phone afterwards. 2 minutes before I stood at the traffic light, the tachometer indicated still good 40km/h (it went downhill) not to imagine what could have happened. maybe I should start to pray ;-) unfortunately I can only post after 10 posts photos or left on pictures :-/ it looks exactly the same as with tds, exactly the same place.
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Post pictures please. Can you figure out the manufacturing date of your Vectron?
A heavy-duty update to our iconic OCL frame hinge, the OCL+ is built to exceed ISO 4210 and EN 15194 testing requirements. Leveraging the hinge design of the long-tail Tern Cargo Node, the OCL+ features a single-shaft design, advanced welding techniques, and robust gussets, so it stays stiff and strong during even the fastest commutes. Stronger by Design Making the hinge taller and moving the pivoting surfaces outward from the center axis more than doubles overall strength and stiffness. It’s a difference you’ll feel from your very first ride. |
all right, 3 more posts until i can post pictures. yesterday i reached the 5 post in 24hrs - limit ;-)
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two...
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aaaaaaaaaaaand here we go!
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In the last picture, looks like there is a gusset plate. Can you take a picture of the longitudinal welding of the gusset plate from outside the tube?
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Have you contacted Tern about the failure and if so, what has been their response so far?
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Somebody in that company needs to go on trial. This is criminal.
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Originally Posted by gleearch
(Post 21184744)
Have you contacted Tern about the failure and if so, what has been their response so far?
Then they had the bike and the evidence and the injured rider didn't. |
i get a completely new bike from my dealer and the defective one is taken by the forwarder in the same train and taken to the wholesaler responsible for germany (Hartje). if something had happened to me, even if only a little, my lawyer would have heard from me immediately. I'm luckily insured. here's the picture of the of the longitudinal welding.
https://cimg4.ibsrv.net/gimg/bikefor...dbc9b54fa7.jpg |
Thank you for posting, Towatai. You may be saving someone's life. This company is great at PR and advertising, and has managed to escape the consequences of what would have finished other companies a long time ago.
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that's exactly why i post the whole thing in an english forum as well. you can reach many more people all over the world. i'm seriously thinking about selling the replaced bike right away, but unfortunately there aren't too many alternatives on the german market. most of them are of the "very cheap" type or cost a lot more. Tern unfortunately fills a rather large gap in the market.
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The purpose of the gusset plate is to lay weld in line to the direction of forces. From the last picture, you can see substantial amount of welding (the slot weld to gusset) in line to forces. However if you see how the gusset plate is welded to the clamp face, the weld is perpendicular to the forces. Furthermore, the amount of weld is minimal. Hence the break.
The inner clamp face has a bulge and a hole. So that also introduces complications for welding the gusset. |
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