Laced my first wheel last night
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Laced my first wheel last night dennisbk 06-26-2008
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Posted by on June 26, 2008, 12:56 pm
I bought (thought I stole) a spare front wheel off of ebay few years
ago and finally decided to replace the bearings and actually use it.
I thought the wheel was in pretty good shape. The tire I got with it
was near new and the spokes weren't rusty. A closer examination
revealed a good crack in the rim. Fortunately, the purchase price was
cheap enough that a brand new rim and spokes was still worthwhile
(Honda wanted $400, but I found something online for $211 shipped)
I haven't laced a wheel since I laced a 10 speed wheel as a teenager.
The motorcycle wheel was much easier. I'm a little worried about the
trueness, so I'm trying to figure out how to McGyver a truing stand.
The ebay rear wheel I bought, for much more money, didn't have a
cracked rim, but every single spoke was frozen. I broke around a
third of them freeing them up and also spent several hours. I think I
would have been better off buying a new rim and spokes and just
cutting all of the old ones.
For some reason, about 75% of the stuff I buy on ebay ends up not
being the deal I thought it was.

Dennis Kennedy
'98 XR400

Posted by Tiago Rocha on June 26, 2008, 1:58 pm
On Jun 26, 1:56=A0pm, denni...@gmail.com wrote:
> I bought (thought I stole) a spare front wheel off of ebay few years
> ago and finally decided to replace the bearings and actually use it.
> I thought the wheel was in pretty good shape. =A0The tire I got with it
> was near new and the spokes weren't rusty. =A0A closer examination
> revealed a good crack in the rim. =A0Fortunately, the purchase price was
> cheap enough that a brand new rim and spokes was still worthwhile
> (Honda wanted $400, but I found something online for $211 shipped)
> I haven't laced a wheel since I laced a 10 speed wheel as a teenager.
> The motorcycle wheel was much easier. =A0I'm a little worried about the
> trueness, so I'm trying to figure out how to McGyver a truing stand.
> The ebay rear wheel I bought, for much more money, didn't have a
> cracked rim, but every single spoke was frozen. =A0I broke around a
> third of them freeing them up and also spent several hours. =A0I think I
> would have been better off buying a new rim and spokes and just
> cutting all of the old ones.
> For some reason, about 75% of the stuff I buy on ebay ends up not
> being the deal I thought it was.
>
> Dennis Kennedy
> '98 XR400

I've got a complete XR250 rear wheel, with rim, spokes, tire, tube,
rim lock, sprocket and bearings all in prime condition off ebay for
less than a hundred US dollars. Another hundred to ship it down
here :-) Worth it every cent, much cheaper than if I were going to buy
this stuff locally.

ebay has been good to me, except when I bought that SD card from
China... Grossly falsified and with several bad blocks right out of
the box...

-- tiago

Posted by scrapeNO-Thanks@nc.rr.com on June 26, 2008, 3:46 pm

> ebay has been good to me, except when I bought that SD card from
> China... Grossly falsified and with several bad blocks right out of
> the box...

China? Really??? Who'd have thought?

Posted by Volker Bartheld on June 27, 2008, 5:17 am
Hi!

> ebay has been good to me, except when I bought that SD card from
> China... Grossly falsified and with several bad blocks right out of
> the box...

How did you test this? Note that most NVRAM-/Flash-Memory cards have some
kind of load/wear balancing so that simply formatting it doesn't always
reveal a potential problem. Some cards even come with defect-management (as
most HDDs do), so you might not even notice a bad block.

Also just copying a HUGE file and verifying the differences can lead to
false negative results due to buffering/caching and bit-flip-errors that
don't show up because the value matches just by accident.

I vaguely remember that the German computer magazine c't had some kind of
tool but I forgot where.

Cheers,
Volker,

had a JoyIT USB-stick that failed NTFS-format but worked with FAT32 and was
incredibly s.....l.................o.......................w from time to
time. Got replaced within warranty, same thing again. Also had CRC-errors
in .ZIP-archives. Got a Corsair FlashVoyager of the same size for free
after massively complaining.


--
@: I N F O at B A R T H E L D dot N E T
3W: www.bartheld.net

Posted by Tiago Rocha on June 27, 2008, 7:23 am


Volker Bartheld wrote:
> Hi!
>
> > ebay has been good to me, except when I bought that SD card from
> > China... Grossly falsified and with several bad blocks right out of
> > the box...
>
> How did you test this? Note that most NVRAM-/Flash-Memory cards have some
> kind of load/wear balancing so that simply formatting it doesn't always
> reveal a potential problem. Some cards even come with defect-management (as
> most HDDs do), so you might not even notice a bad block.
>
> Also just copying a HUGE file and verifying the differences can lead to
> false negative results due to buffering/caching and bit-flip-errors that
> don't show up because the value matches just by accident.
>
> I vaguely remember that the German computer magazine c't had some kind of
> tool but I forgot where.
>
> Cheers,
> Volker,
>
> had a JoyIT USB-stick that failed NTFS-format but worked with FAT32 and was
> incredibly s.....l.................o.......................w from time to
> time. Got replaced within warranty, same thing again. Also had CRC-errors
> in .ZIP-archives. Got a Corsair FlashVoyager of the same size for free
> after massively complaining.


I discovered the bad blocks when trying to play certain folders and
the stereo played like 2 secs of each song and moved to the next and
sometimes it wouldn't play at all. I tried ntfs, fat and fat32.
Researching about how to remove the bad blocks on the card was when I
learned about the wear leveling stuff.

I've bought that card to copy mp3 files to play on the car. It's a 4GB
card. In a scenario that today I copy, say, 20 files and tomorrow I'll
add 50 more files, those 50 become corrupted. I have to format the
card and copy all 70 files all at once. Format always tells me "bad
blocks"! what??? bad blocks on a solid state media???

I had a flash drive (1gb, kingston, not falsified) that would hang if
I tried to copy two files simultaneously.

The flash drive (4gb, kingston, not falsified, cheap as rotten
bananas) that I use as "network cable" works flawlessly.

-- Tiago

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