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Steven Challenge
recumbent enthusiast

Netherlands
141 Posts
Posted - 05/28/2012 :  10:51:09  Show Profile  Reply with Quote
I've bought my Challenge Hurricane second hand from a guy who didn't actually knew what he was doing, maintanance wise. For instance, the chain was twisted on the bike. Probably when guiding it thru the tubes. He also tightened the two screws that prevents the chain to go to far on the pignon. (sorry about the vocabulairy, English isn't my first language)
I've tackled most of the little and big mistakes he did, but I can't seem to get the gears right. I know how to, but I don't know witch derailleur goes with witch gripshift. It's got a SRAM 5.0 derailleur and a SRAM 7.0 gripshift. Both 8 gears.
Does it matter what kind of gripshift is attached to a derailleur? Or does it just has to be the same amount of gears?
I've recently changed the inner cable and added cable ends on the outer cable. This was without cable ends, so the end of the cable was all chewed up by continues use.

Jeff Wills
human power supergeek

USA
1141 Posts
Posted - 05/28/2012 :  12:41:34  Show Profile  Visit Jeff Wills's Homepage  Reply with Quote
That derailleur and shifter should be compatible. If the cable housing didn't have ferrules (ends) before, I would replace all the housing. I bet it's messed up inside and giving you resistance.

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Steven Challenge
recumbent enthusiast

Netherlands
141 Posts
Posted - 05/30/2012 :  00:52:46  Show Profile  Reply with Quote
It feels like it's got some resistance, like you mentioned. It seems the derailleur doesn't have room for a ferrule. The hole only fits the cable housing.
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mhelander
recumbent enthusiast

Finland
273 Posts
Posted - 05/30/2012 :  01:36:04  Show Profile  Reply with Quote
That's quite normal. If you're using quality cables which typically are little thicker, you need to use metal ferrules instead of plastic ones.

Using cables without ferrules is ok too but make sure you use file or angle grinder to finish cable end after cutting to be precisely straight. Then use something sharp to push plastic/teflon inner cable so that it doesn't resist wire movement, that's simple to do after angle grinder treatment when whole cable is warm.

I've had perfect shifting in my SRAM X.9 derailleurs when using above method for installing cables and wires.

Cheers,
-Mika

MetaPhysic 700c @ 2011, M5 CrMo Lowracer @ 2010
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warren
human power expert

4269 Posts
Posted - 05/30/2012 :  05:48:30  Show Profile  Visit warren's Homepage  Reply with Quote
It should be noted that SRAM trigger / twist shifters are not always compatible with Shimano derailleurs. If both are SRAM and rated for the same number of gears it should be fine.

-Warren.
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Steven Challenge
recumbent enthusiast

Netherlands
141 Posts
Posted - 05/30/2012 :  07:36:06  Show Profile  Reply with Quote
Thanks for the info. With all the stupid little mistakes I've found before I bought the bike, I was able to lower the price. "this doesn't work, that doesn't work either. I'm going to have to bring it to a bicycle repair man before I can ride. That's gonna cost." ;)
It seems the bike was put together just for show, it was unridable. The skewer set was so tight, the wheels turned about half a cycle. The tubes weren't fastened. The fenders were held in place with tiewraps. Overall the bike looked in good condition, providing it was put together properly.
#Off to buy a cable.#
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Steven Challenge
recumbent enthusiast

Netherlands
141 Posts
Posted - 06/13/2012 :  00:00:48  Show Profile  Reply with Quote
I took the bike to a regular bicycle repair shop yesterday. I couldn't manage to make the gears work. Turns out, the former owner for some strange reason, drilled the hole for the cable to go in the derailleur and put a screw in there to fine tune the gears. The repair man fixed it and globaly scanned the bike for further abnormalities. He found the chain was up to replacement, as well as the breakpads. He didn't have any tires but he could order them for me.
I didn't let him do the other repairs, perhaps in a couple of weeks. He did enjoy working on a recumbent. He was looking for a starters recumbent bike to sell. I pointed him towards the most common 'bents. Perhaps next time I go there, he's got recumbents in the store.
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jimincolorado
Starting Member

USA
26 Posts
Posted - 06/13/2012 :  15:10:22  Show Profile  Reply with Quote
Be sure to post us a picture when you get it up and running!

Jim
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Steven Challenge
recumbent enthusiast

Netherlands
141 Posts
Posted - 09/25/2012 :  00:01:32  Show Profile  Reply with Quote
quote:
Originally posted by jimincolorado

Be sure to post us a picture when you get it up and running!

Jim


I stil haven't had the time to take pictures. In a couple of days I'm going to take some time to do. I'm an amateur photographer and I've got some ideas for a photo shoot with the bike.
Meanwhile I've had the chain, cassette, derailleur pulleys and breakpads replaced. Also a new simple spedometer. The repairman said the derailleur was also due for an overhaul, but it could be used for a couple of months.
After a couple of weeks, I noticed a rattle. Turns out, the derailleur pulleys are worn down and the derailleur is loose. I can move the pivots about 2mm.
I've googled the SRAM 5.0 derailleur and found out that this is a 1:1 ratio. I'm not quite sure, because the text I've found talks about ESP. I can't find anything on the derailleur that says "ESP". I know the cage plate is shorter than on a regular bicycle. Is there any way to know how to buy the right derailleur?
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Jeff Wills
human power supergeek

USA
1141 Posts
Posted - 09/25/2012 :  18:14:06  Show Profile  Visit Jeff Wills's Homepage  Reply with Quote
quote:
Originally posted by Steven Challenge

I've googled the SRAM 5.0 derailleur and found out that this is a 1:1 ratio. I'm not quite sure, because the text I've found talks about ESP. I can't find anything on the derailleur that says "ESP". I know the cage plate is shorter than on a regular bicycle. Is there any way to know how to buy the right derailleur?


Any SRAM "x.0" rear derailleur (3.0, 5.0, 9.0, X3, X7, XX, etc.) will be compatible. "Named" SRAM rear derailleurs (Centera, MRX) are cross-compatible with Shimano, but not compatible with SRAM 1:1 shifters.

"ESP" is older SRAM marketing-speak for their 1:1 ratio.

Get a load of this:
http://www.disraeligears.co.uk/Site/SRAM_ESP_9.0SL_Woody_derailleur.html




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Edited by - Jeff Wills on 09/25/2012 18:15:10
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Steven Challenge
recumbent enthusiast

Netherlands
141 Posts
Posted - 09/26/2012 :  02:22:30  Show Profile  Reply with Quote
Thanks for the info Jeff. I'm going derailleur hunting later today. That woody derailleur looks amazing. Some of the other derailleurs are a real work of art.
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Steven Challenge
recumbent enthusiast

Netherlands
141 Posts
Posted - 09/28/2012 :  07:59:28  Show Profile  Reply with Quote
I went to a couple of bike shops (one specific recumbent). A lot of them shrugged and didn't know what to say or where to look. The recumbent shop suggested an X9 or a dualdrive derailleur. Just the derailleur for €70 (about 90USD)
Another shop also suggested the dualdrive derailleur, price €28 (about 36USD) I can pick up the latter tomorrow or early next week.

What bothers me (besides the big price difference) is the fact that few regular bicycle shops dare to touch a recumbent. What's the big deal? It's got basically the same technique, only a few specific components.
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Jeff Wills
human power supergeek

USA
1141 Posts
Posted - 09/28/2012 :  08:45:03  Show Profile  Visit Jeff Wills's Homepage  Reply with Quote
quote:
Originally posted by Steven Challenge


What bothers me (besides the big price difference) is the fact that few regular bicycle shops dare to touch a recumbent. What's the big deal? It's got basically the same technique, only a few specific components.


Too true. In fact, all the parts work the same, it's just that you have to know how they work in order to adjust them properly. Too many so-called mechanics simply work by rote.

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Steven Challenge
recumbent enthusiast

Netherlands
141 Posts
Posted - 10/05/2012 :  00:12:13  Show Profile  Reply with Quote
Yesterday I picked up the dualdrive derailleur. Looks like it's a fit. I have to install it before tuesday, as I need to commute with the recumbent that day.
Also, this weekend it's my wife's birthday, swimming with our daughter, photo exhibition... I've got to squeese in an hour to put the derailleur on the bike somewhere.
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Steven Challenge
recumbent enthusiast

Netherlands
141 Posts
Posted - 10/19/2012 :  00:00:29  Show Profile  Reply with Quote
Almost forgot to mention. The Dualdrive derailleur fits and works well. And I've got the option of putting a hub gear on the bike.
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Larry Lem
human power supergeek

South Sandwich Islands
1997 Posts
Posted - 10/19/2012 :  09:20:42  Show Profile  Reply with Quote
Please see Jeff Wills' explanation in his 9/25/2012 18:14:06 message.

Larry Lem
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Jeff Wills
human power supergeek

USA
1141 Posts
Posted - 10/19/2012 :  20:55:49  Show Profile  Visit Jeff Wills's Homepage  Reply with Quote
quote:
Originally posted by mackada

Can I run a Shimano groupset with SRAM cassettes? Noobish question but I'm curious. So much to learn.


Well, Larry, my reply above didn't really cover this.

This does kind of deserve its own thread, but: in general, SRAM chains and cassettes are cross-compatible with Shimano. In fact, this is my preferred setup: Shimano shifters, derailleurs, and hubs and SRAM chains and cassettes. I have many thousands of miles on this without a problem.

Dainik, if you want to learn more, the basics are covered well at the Park Tool site: http://www.parktool.com/blog/repair-help
A good resource if you can't find the answer there or elsewhere on the Internet is the Bike Forums Bicycle Mechanics sub-forum: http://www.bikeforums.net/forumdisplay.php/10-Bicycle-Mechanics . You'll find that good questions are answered by experienced mechanics with a minimum of irrelevant chatter.
A good collection of information on older and odder bikes can be found on the late, great Sheldon Brown's site: http://sheldonbrown.com/


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