Shimano Sora Derailleur ?
06-06-20, 12:50 PM
#1
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Shimano Sora Derailleur ?
I have a new Lightining Phantom recumbent with Shimano Sora rear derailleur and Deore shifters. (I realize on this bike they use the cheapest components available), but I would still like to ride it this season. Anyone have experience tuning these? it will shift ,but hops off the smallest cog, I can run up to the next to the last, but not top high gear. Everything is lined up correct. I'm starting to think the dealer gave me the wrong chain, or the cassette is defective or incorrect. I do a standard tune as I do on all of my bikes, but this one will not cooperate. Any suggestions?
Thanks
Thanks
06-06-20, 01:07 PM
#2
Really Old Senior Member
Sounds like the H screw is adjusted too far out, assuming it "hops off" the outside of the smallest cog.
The quality level of the parts is more than sufficient.
The quality level of the parts is more than sufficient.
06-06-20, 01:39 PM
#3
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Basic derailleur adjustment should suffice. Do you have prior experience with this? Adjusting for the small cog is best done with the cable undone so that the derailleur is completely at rest on its own.
06-06-20, 03:40 PM
#4
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06-06-20, 04:40 PM
#5
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Lube the cable.
Adjust H screw.
Adjust H screw.
06-06-20, 05:01 PM
#6
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I have a Sora rear derailleur on my bike. It's a perfectly good device. Just adjust it accordingly.
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“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
06-06-20, 05:05 PM
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Make certain that the rear shifter has paid out all of the cable (it is in high gear position) before attaching it to the derailleur; click the shifter a few times while pulling on the cable to ensure this. It sounds like you are off 1 gear in your indexing, besides having a mis-adjusted high limit screw. Make sure the low limit screw does not allow the derailleur to shift past the big cog.
06-06-20, 05:43 PM
#8
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Make certain that the rear shifter has paid out all of the cable (it is in high gear position) before attaching it to the derailleur; click the shifter a few times while pulling on the cable to ensure this. It sounds like you are off 1 gear in your indexing, besides having a mis-adjusted high limit screw. Make sure the low limit screw does not allow the derailleur to shift past the big cog.
06-06-20, 05:49 PM
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There is no reason that the Sora derailleur should not perform its task perfectly well. Higher-level components may be lighter or better finished but all will function properly IF correctly installed and adjusted. One suggestion would be to have the derailleur hanger adjustment checked; even on a new bike it may be slightly off.
06-06-20, 05:54 PM
#10
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There is no reason that the Sora derailleur should not perform its task perfectly well. Higher-level components may be lighter or better finished but all will function properly IF correctly installed and adjusted. One suggestion would be to have the derailleur hanger adjustment checked; even on a new bike it may be slightly off.
06-06-20, 10:11 PM
#11
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Also, given your Lightning's long and contorted cable routing, I'd double check that the cable is moving freely through the housing. A little extra friction will cause the derailleur to hesitate when shifting into the small cog which could be the source of your hop.
FWIW: I bought my Lightning directly from the factory in 1991. Since I lived close by I didn't have to deal with shipping. It was a fun bike- now there's 4 recumbents in the garage. My wife and I appear in the old Lightning promotional video at about the 8 minute mark:
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Jeff Wills
Comcast nuked my web page. It will return soon..
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06-07-20, 05:14 AM
#12
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Nice vintage video, and some interesting info as well. I would have liked to get the P38, but they were a little too pricey for me. It came down to this Phantom or a Barcchetta Giro.
