7 of 9

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gtvlusso
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7 of 9

Postby gtvlusso » Tue Dec 04, 2012 14:12 pm

For those of you who are....well, nerds; 7 of 9 would mean a night alone with the sci fi channel on.....

For me, 7 of 9 means a night of oil, dirt and swearing.

My bike currently runs a 2 x 7 setup (126mm oln spacing)

I don't want to cold set the frame to 130mm, although this is possible as it is a steel frame, for several reasons;

1, would require a new hub or spacers and a wheel rebuild/dishing or buying a new wheel.
2, chainline would change meaning that I would probably at minimum have to replace the BB

So, what I can do is; replace the cassette with a 9 speed cassette and switch the 9 speed spacers for 10 speed spacers. This gives me 9 speeds on a 7 speed hub - I would have to use a thinner chain and could use more current parts rather than scouring ebay for vintage and used 7 speed parts.

I then need to change the shifters from 105 7 speed to dura ace 9 speed DT levers. I also need to change the 105 mech for a mech that will load up to 9 speeds.

My questions are:

1, Is this worth is for an old frame used for commuting in winter?
2, has anyone done this switch out using DT lever shifting?
3, The change should make the bike more supportable for the future, is this true?
4, Is Dura Ace a bit too OTT for a winter/commuter bike?

Any other things I have missed?

mudcovered
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Re: 7 of 9

Postby mudcovered » Tue Dec 04, 2012 14:14 pm

If you are changing the 9 speed spacers for 10 speed spacers on the rear cogs then you will need a 10 speed shifter. a 9speed one will pull slightly too much cable!

Mike

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Greg66 Tri v2.0
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Re: 7 of 9

Postby Greg66 Tri v2.0 » Tue Dec 04, 2012 14:16 pm

gtvlusso wrote:For those of you who are....well, nerds; 7 of 9 would mean a night alone with the sci fi channel on.....


Stopped reading right there.

Did I miss anything interesting in the rest of the post?
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gtvlusso
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Re: 7 of 9

Postby gtvlusso » Tue Dec 04, 2012 14:16 pm

mudcovered wrote:If you are changing the 9 speed spacers for 10 speed spacers on the rear cogs then you will need a 10 speed shifter. a 9speed one will pull slightly too much cable!

Mike


Ah good point! I could go - 8 speed with 9 speed spacers, I suppose!

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gtvlusso
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Re: 7 of 9

Postby gtvlusso » Tue Dec 04, 2012 14:23 pm

Greg66 Tri v2.0 wrote:
gtvlusso wrote:For those of you who are....well, nerds; 7 of 9 would mean a night alone with the sci fi channel on.....


Stopped reading right there.

Did I miss anything interesting in the rest of the post?


Shame:

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mudcovered
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Re: 7 of 9

Postby mudcovered » Tue Dec 04, 2012 14:27 pm

gtvlusso wrote:Ah good point! I could go - 8 speed with 9 speed spacers, I suppose!

That might work. The other think to contend with is the fact that on modern cassettes the top three cogs are bolted to a carrier so you can't change the spacing.

Mike

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rjsterry
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Re: 7 of 9

Postby rjsterry » Tue Dec 04, 2012 14:32 pm

I run an 8-speed cassette with 7-speed shifters (old RSX), and it works fine; I just have to pick which 7 cogs I'm going to use, 12-23 or 13-25. I have a Sora rear mech, which, err, does the job.
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mudcow007
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Re: 7 of 9

Postby mudcow007 » Tue Dec 04, 2012 14:35 pm

voyager is doing repeats on some weird channel on VM at the moment

its rekindled my obsession with all thing Borg

hello 7!!

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ding ding dong!
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WGWarburton
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Re: 7 of 9

Postby WGWarburton » Tue Dec 04, 2012 14:42 pm

gtvlusso wrote:...So, what I can do is; replace the cassette with a 9 speed cassette and switch the 9 speed spacers for 10 speed spacers. This gives me 9 speeds on a 7 speed hub - I would have to use a thinner chain and could use more current parts rather than scouring ebay for vintage and used 7 speed parts.
...
1, Is this worth is for an old frame used for commuting in winter?
2, has anyone done this switch out using DT lever shifting?
3, The change should make the bike more supportable for the future, is this true?
4, Is Dura Ace a bit too OTT for a winter/commuter bike?


You can still buy 7-speed kit new. It'll be a while before you need to scour ebay for parts, I think. If you're worried then set a search running now and pick up compatible parts cheap when they come onto the market. You'll then have spares ready when things wear out.

I don't think that having a custom setup that requires modifying a cassette every time you replace it really counts as "supportable" on a winter commuter, but maybe that's just me.... :-)

Cheers,
W.

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nicklouse
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Re: 7 of 9

Postby nicklouse » Tue Dec 04, 2012 14:42 pm

sheldon covers this well.

and really you want to be using 9 of 10 on a 7speed body.

or 8 of 9

http://www.sheldonbrown.com/k7.html#up7
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Veronese68
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Re: 7 of 9

Postby Veronese68 » Tue Dec 04, 2012 14:50 pm

Greg66 Tri v2.0 wrote:
gtvlusso wrote:For those of you who are....well, nerds; 7 of 9 would mean a night alone with the sci fi channel on.....


Stopped reading right there.

Did I miss anything interesting in the rest of the post?

I regained interest around the time of Muckyheifer's post. What was all the dribble in between?

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Kieran_Burns
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Re: 7 of 9

Postby Kieran_Burns » Tue Dec 04, 2012 15:01 pm

It used to be 7 of 9 for me.

Then I stumbled across Lost Girl.

Image

I'm not entirely sure 7 of 9 managed any girl on girl action.
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gtvlusso
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Re: 7 of 9

Postby gtvlusso » Tue Dec 04, 2012 15:10 pm

nicklouse wrote:sheldon covers this well.

and really you want to be using 9 of 10 on a 7speed body.

or 8 of 9

http://www.sheldonbrown.com/k7.html#up7


Thanks - I read Sheldon, my concern is that I don't want to commit the folding without ironing out all the potential pitfalls/voice of reason and experience.

I was also just looking for an innocent thread that I could look at with some fine blart on it whilst working......Where is DDD today?

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TailWindHome
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Re: 7 of 9

Postby TailWindHome » Tue Dec 04, 2012 15:17 pm

So......someone's going to have to explain the phrase 7 of 9 to me.
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mudcow007
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Re: 7 of 9

Postby mudcow007 » Tue Dec 04, 2012 15:28 pm

TailWindHome wrote:So......someone's going to have to explain the phrase 7 of 9 to me.


7 of 9 was a character in Star Trek Voyager an had big bangers

nuff said.....
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Veronese68
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Re: 7 of 9

Postby Veronese68 » Tue Dec 04, 2012 15:33 pm

mudcow007 wrote:
TailWindHome wrote:So......someone's going to have to explain the phrase 7 of 9 to me.


7 of 9 was a character in Star Trek Voyager an had big bangers

nuff said.....

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meanredspider
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Re: 7 of 9

Postby meanredspider » Tue Dec 04, 2012 15:46 pm

gtv - are you beginning to regret your choice of title? I'm impressed that every 3rd or 4th post you manage to drag it back to your intended topic.... :wink: :D
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gtvlusso
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Re: 7 of 9

Postby gtvlusso » Tue Dec 04, 2012 15:48 pm

meanredspider wrote:gtv - are you beginning to regret your choice of title? I'm impressed that every 3rd or 4th post you manage to drag it back to your intended topic.... :wink: :D


I think this just proves that we are all closet perverts and quite nerdy.....

TBH, who gives a frig about bikes when were talking about hot chicks.....

el_presidente
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Re: 7 of 9

Postby el_presidente » Tue Dec 04, 2012 15:49 pm

You can easily fit a 130mm hub into a 126mm steel frame. You don't need to cold set it or any of that nonsense. It's only 2mm each side, gently pull the dropouts apart as you drop in the hub and you will barely notice there's any sort of incompatibility. Well within the tolerances of the frame material as well I would hazard.

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gtvlusso
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Re: 7 of 9

Postby gtvlusso » Tue Dec 04, 2012 15:55 pm

el_presidente wrote:You can easily fit a 130mm hub into a 126mm steel frame. You don't need to cold set it or any of that nonsense. It's only 2mm each side, gently pull the dropouts apart as you drop in the hub and you will barely notice there's any sort of incompatibility. Well within the tolerances of the frame material as well I would hazard.


Trashes your chainline - chainline is set for 126mm spacing. Would also have to buy a new wheelas well as all the other shifting stuff.


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