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View Full Version : broke a DA SP-7410 seat post

bicycletricycle
07-27-2011, 09:34 AM
I really like DA SP-7410 seat posts. I have a lot of them. I broke one this morning at the start of my commute. First time I have had one of these fail. Maybe I should just go with all one piece posts. This post was used so who knows what happen to it in its prior life. I think I got this one from fastvegan.

http://i975.photobucket.com/albums/ae236/bicycletricycle/IMG_1330.jpg
roguedog
07-27-2011, 09:41 AM
<wince>
markie
07-27-2011, 10:29 AM
Owwww.

I have one of these on a fixie. I do not want to imagine breaking a seatpost whilst riding fixed....

So was it uneventful when it broke? Are you still all man?
AngryScientist
07-27-2011, 10:32 AM
fatty :)
bigman
07-27-2011, 10:32 AM
I would call Shimano customer service - never heard of one of these failing before.

Glad no injury reported.
bicycletricycle
07-27-2011, 11:42 AM
totally uneventful. Jumped on my bike, seat broke off, both feet slipped right off the pedals onto the ground, all parts are still accounted for. I am not the original owner so I would not expect shimano to do anything about the post. Maybe it was used by a 400 pound cyclocross rider or something.
bumknees
07-27-2011, 11:56 AM
glad to hear you didn't get hurt -- looks like it could have been a most uncomfortable prostate exam...
EricEstlund
07-27-2011, 12:15 PM
I've seen a few of these where the heads loosened in the posts, but I haven't seen that sort of separation before.
Der_Kruscher
07-27-2011, 12:26 PM
Discovery used the Ultegra version of this post because it was one piece and a little stronger without too much of a weight penalty.
bicycletricycle
07-27-2011, 12:30 PM
i have a few ultegras as well, are you sure they are one piece?sometimes i think i can see a seem. I guess i should use a flashlight and check out the inside. Maybe i am seeing some kinda forging artifact.
texbike
07-27-2011, 12:35 PM
I love the look of these posts, but in practice haven't liked them. They scratch WAY too easily and the head has loosened on 2 of the 3 that I have had.

The earlier 7400 series posts are MUCH better imho.

I'm glad that your equipment is all intact! :)

Texbike
bfd
07-27-2011, 12:59 PM
I've seen a few of these where the heads loosened in the posts, but I haven't seen that sort of separation before.

I have one where the head is loose when mounted on a bike. Is there any way to fix or is it now a fancy paperweight?! :( Good Luck!
EricEstlund
07-27-2011, 01:03 PM
I have one where the head is loose when mounted on a bike. Is there any way to fix or is it now a fancy paperweight?! :( Good Luck!

In my experience it was a paper weight. This was back when I was working in a shop and these were current- that would have been sent back to Shimano for a replacement.

I have an irrational like for these, but it's balanced against my rational love of one piece Kalloy's.

At +67g of bombproofness and over a $100 savings it's hard to argue.

http://farm6.static.flickr.com/5051/5481333792_e5db4b4c7f.jpg
bfd
07-27-2011, 01:26 PM
In my experience it was a paper weight. This was back when I was working in a shop and these were current- that would have been sent back to Shimano for a replacement.

I have an irrational like for these, but it's balanced against my rational love of one piece Kalloy's.

At +67g of bombproofness and over a $100 savings it's hard to argue.

http://farm6.static.flickr.com/5051/5481333792_e5db4b4c7f.jpg

Thanks. It was suggested I call Shimano and did. The guy just laughed and said they haven't made this post in years and have none in stock. Oh well, its now a paperweight and I was lucky enough to substitute it with a Campy Record ti seatpost!

Btw, is that your bike in the picture? Very nice! Good Luck!
EricEstlund
07-27-2011, 01:28 PM
Yeah, they haven't been made in some time, and even original owners would be out of the three year warranty by now (unless it was old stock just purchased from a dealer).

Yes, that is one I built. It live in CA now.
bfd
07-27-2011, 01:57 PM
Yeah, they haven't been made in some time, and even original owners would be out of the three year warranty by now (unless it was old stock just purchased from a dealer).

Yes, that is one I built. It live in CA now.

That would be interesting. Assuming there are some NOS DA seatposts out there, I suppose that if there was a warranty issue, Shimano could offer to replace with one from their PRO series:

http://www.pro-bikegear.com/publish/content/pro_2010/us/en/index_copy/products/seatpost/race.html

or perhaps with an Ultegra seatpost (assuming they still have some in stock):

http://www.nashbar.com/bikes//ProductPopupView?catalogId=10052&storeId=10053&productId=198217&langId=-1&parent_category_rn=&top_category=

Good Luck!