Derailleur hanger replacement

[David M]

Unfortunately, I got pranged on an evening ride this week (by the
cyclist behind me: for some reason someone up ahead in our group slammed
on the anchors completely without warning, leaving those of us behind
with progressively less time to react and stop..).

The derailleur and the derailleur hanger bore the brunt of the
collision. The derailleur itself doesn't immediately appear to be
significantly damaged, but as it's a reasonably low-end mech I might as
well replace it anyway.

The sacrificial derailleur hanger, on the other hand, certainly did its
sacrificial thing and got rather bent. Luckily, another member of our
group managed to bend it back into shape reasonably well, but I suspect
that the impact will not have done wonders for its durability and
lifespan, so I plan to replace it as well.

Unfortunately, EBC (for the bike is one of theirs) are booked up for
repairs for the next two weeks, but I would prefer to get the bike
sorted out before then..

I know nothing about these things, but the derailleur hanger (and the
frame, correspondingly) has a slinky curved shape where it abuts with,
and fits into a recess on the frame, presumably meaning that I'd need to
get an exactly-matching part to fit correctly.

Is this slinky curved join a standard shape [1], meaning that any bike shop
should be able to get hold of the correct part easily, or does each bike
maker tend to use their own design? (It's an EBC Revolution Trailfinder,
btw)

[1] It's sort of like the top-half of a semi-circle, with the bottom
half flaring out to the sides.


Obviously the sensible thing would be to go to EBC as they should be
able to dredge up the necessary part easily enough, but given that their
workshop is booked-out, if I went to another LBS would they be able to
get the right part easily enough?

Sorry if this is a dumb question, mechanical stuff isn't really my
strong point!

Thanks,


David.

("And 'Hello' to anybody that knows me..")

--
David M. -- Edinburgh, Scotland. --[en,fr,(de) <-- corrections welcome]
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[Rob Morley]

On Sat, 19 Jul 2008 17:24:10 +0100
David M > wrote:

> Unfortunately, EBC (for the bike is one of theirs) are booked up for
> repairs for the next two weeks, but I would prefer to get the bike
> sorted out before then..
>
> I know nothing about these things, but the derailleur hanger (and the
> frame, correspondingly) has a slinky curved shape where it abuts
> with, and fits into a recess on the frame, presumably meaning that
> I'd need to get an exactly-matching part to fit correctly.
>
> Is this slinky curved join a standard shape [1], meaning that any
> bike shop should be able to get hold of the correct part easily, or
> does each bike maker tend to use their own design? (It's an EBC
> Revolution Trailfinder, btw)
>
The fitting varies by manufacturer.

> Obviously the sensible thing would be to go to EBC as they should be
> able to dredge up the necessary part easily enough, but given that
> their workshop is booked-out, if I went to another LBS would they be
> able to get the right part easily enough?
>
I doubt an LBS would have EBC parts in stock, although I could be
wrong - it's possible the EBC part is the same as a mainstream
manufacturer's. Why not just get the hanger from EBC and get someone
else to fit it for you, if you don't fancy doing it yourself?

[soup]

David M wrote:



>
> Obviously the sensible thing would be to go to EBC as they should be
> able to dredge up the necessary part easily enough, but given that their
> workshop is booked-out, if I went to another LBS would they be able to
> get the right part easily enough?
>

There are LOTS of different hangers.
And I seriously doubt any LBS would carry EBC specific hangers .
Is your bike after 2005? If so perhaps
http://preview.tinyurl.com/5qmm6y would be suitable.


TBH fitting a new rear mech is fairly trivial the only bit (arguably)
that requitres any skill is adjusting the mech so the gear cable moves
the mech' properly and that the chain doesn't shoot of the ends.
Fitting the mech and hanger should be fairly obvious and there are lots
of videos etc (youtube et al) on how to "adjust" rear mechs so that
changing is smooth/easy/troublefree etc.


--
'S rioghal mo dhream
www.cheesesoup.myby.co.uk

[David M]

soup wrote in uk.rec.cycling

> There are LOTS of different hangers.
> And I seriously doubt any LBS would carry EBC specific hangers .
> Is your bike after 2005? If so perhaps
> http://preview.tinyurl.com/5qmm6y would be suitable.

That looks like the one (albeit photographed back-to-front ;-)
Duh, why didn't I think of looking on the website?

Hmm, mind you, the other Revolution hangers look sort of similar, too,
and I can't remember for sure whether I got my bike in 2005 or 2004, or
maybe even 2006.. Hmmm...


> TBH fitting a new rear mech is fairly trivial the only bit (arguably)

Oh, I know. I've done it in the past, but..

> that requitres any skill is adjusting the mech so the gear cable moves
> the mech' properly and that the chain doesn't shoot of the ends.

...that's the bit that I hate as it takes all the time and effort and
leaves you cursing. :-(

At long last (new job that pays more than studentesque wages and has a good
payrise policy :), although I'm not exactly rolling in cash, I am now at
least in the pleasant position of not exactly totally begrudging paying
bike mechanics to do the - literally - dirty work for me.

You (or at least me) get to a stage where you realise that because of
all the time you spend at work, things like evenings and weekends are
fairly precious, and frankly the last thing I can be bothered doing with
them is spending/wasting time doing bike repairs..

(I do realise that for some people that's part of the fun of owning
[a|several] bike[s], of course ;-)


Thanks for your help,


David.

--
David M. -- Edinburgh, Scotland. --[en,fr,(de) <-- corrections welcome]
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[Pete Biggs]

David M wrote:
> soup wrote in uk.rec.cycling
......
>> that requitres any skill is adjusting the mech so the gear cable
>> moves the mech' properly and that the chain doesn't shoot of the
>> ends.
>
> ..that's the bit that I hate as it takes all the time and effort and
> leaves you cursing. :-(

The mech can be removed with the cable still attached, so it won't need
readjusting when it is fitted to the replacement hanger. If you're up to
removing the wheel, then you can do this job. It is easy, it is peasy, and
what's more, it's lemon and squeazy.

I would expect EBC to post you the part if you tell them as much info as you
can, and send them a picture of the existing hanger.

~PB