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 Post subject: SRAM ESP 9.0 mech.
PostPosted: Sat Jul 20, 2013 11:57 pm 
retrobike rider
retrobike rider

Joined: Thu Apr 17, 2008 1:24 am
Posts: 7563
Location: Manchester
I have one if these but don't know much about it.
There is a sticker that mentions the actuation ratio but its damaged so is it 1:2 or 1:2?!
Are they any good? It seems to be fully rebuildable as they've used bolts not rivets!


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 Post subject: Re: SRAM ESP 9.0 mech.
PostPosted: Sun Jul 21, 2013 12:27 am 
Gold Trader
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Joined: Thu Mar 29, 2007 1:08 am
Posts: 2658
Location: Kray Territory
I've one of these as well...anything with ESP markings is 1:1 (I don't think that SRAM made a 1:2 mech). Therefore it won't work with any other indexed shifter except SRAM ESP versions as the cable pull will be all wrong. I'm running mine over 8 speeds with a XC Pro thumbie using friction and all is well. I would definitely say that it is very light but perhaps a little flimsy compared with say, a M737 XT version. Looks very cool though :)


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 Post subject: Re: SRAM ESP 9.0 mech.
PostPosted: Sun Jul 21, 2013 1:59 am 
retrobike rider
retrobike rider

Joined: Thu Apr 17, 2008 1:24 am
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Location: Manchester
Ok, thanks.
I've weighed it and it's 207 grams, which is inbetween the 9.0 and the 9.0 SL.
I think it's going to turn into a lightening project!


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 Post subject: Re: SRAM ESP 9.0 mech.
PostPosted: Sun Jul 21, 2013 6:08 am 
National & North West AEC
National & North West AEC
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Joined: Mon Nov 03, 2008 12:43 am
Posts: 8146
Location: Macclesfield Forest
Being SRAMs early 1:1 actuation mechs it will be compatible with any SRAM 1:1 shifter, including grip-shifters and trigger types.
I have tried and tested this recently with some modern X-9 trigger shifters and a 16 year old ESP 9.0 rear mech.

Back in 1997, I upgraded to the early SRAM ESP 9.0 rear mech and 9.0 gripshift on my 95 Zaskar. It was a massive improvement over the Gripshift SRT 800 X-Ray shifters that I had fitted before them.
The 2:1 cable pull ratio was compatible with Shimano mechs but even with super clean and lubricated cables you needed the forearm strength of an arm wrestling champion gorilla to shift gears. You could forget about shifting completely in the wet unless you fitted the 'Shark Tooth' grips.

The ESP system still required reasonably clean cables, but meant you could easily make nice light action shifts. In short it was great.

I had ESP 9.0 on that bike with no issues for about five years, at which point my Zaskar was stolen.

I do now have another 1997 Zaskar frame and a complete ESP 9.0 set up. One day I'll get around to building it all up again.


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 Post subject: Re: SRAM ESP 9.0 mech.
PostPosted: Thu Jul 25, 2013 8:58 pm 
retrobike rider
retrobike rider

Joined: Thu Apr 17, 2008 1:24 am
Posts: 7563
Location: Manchester
Excellent, thanks for that.
I'll try and convert it to 2:1 when I get the time!
I can't decide whether to anodise it purple for the alpinestars or red and lighten it a lot for the Torus. I'll put it in the to-do box and see what happens!


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 Post subject: Re: SRAM ESP 9.0 mech.
PostPosted: Thu Jul 25, 2013 10:37 pm 
National & North West AEC
National & North West AEC
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Location: Macclesfield Forest
Rampage wrote:
I'll try and convert it to 2:1 when I get the time!

Why...?


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 Post subject: Re: SRAM ESP 9.0 mech.
PostPosted: Thu Jul 25, 2013 10:46 pm 
retrobike rider
retrobike rider

Joined: Thu Apr 17, 2008 1:24 am
Posts: 7563
Location: Manchester
drystonepaul wrote:
Rampage wrote:
I'll try and convert it to 2:1 when I get the time!

Why...?


Because...all my shifters are 2:1, it's a nice mech, it's easily to take apart, front and rear linkage plates are aluminium (can be anodised).
Hopefully it'll look as gaudy as a Paul's or Proshift rear mech when it's finished!

:)


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 Post subject: Re: SRAM ESP 9.0 mech.
PostPosted: Thu Jul 25, 2013 10:49 pm 
National & North West AEC
National & North West AEC
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Joined: Mon Nov 03, 2008 12:43 am
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Location: Macclesfield Forest
All points taken, but wouldn't it be more simple to just use a 1:1 actuation shifter?


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 Post subject: Re: SRAM ESP 9.0 mech.
PostPosted: Thu Jul 25, 2013 10:59 pm 
retrobike rider
retrobike rider

Joined: Thu Apr 17, 2008 1:24 am
Posts: 7563
Location: Manchester
I don't know of any (except Proshift / Paul's) that can be taken apart easily? These just unbolt.


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 Post subject: Re: SRAM ESP 9.0 mech.
PostPosted: Thu Jul 25, 2013 11:29 pm 
retrobike rider
retrobike rider

Joined: Thu Apr 17, 2008 1:24 am
Posts: 7563
Location: Manchester
Sorry, read your reply wrong!
Quite possibly!
I only like rapidfire or Suntour thumbies really.
The other way is to add a linkage somewhere along the cable run.


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