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Help with matching Shimano components

Old 10-05-22, 11:04 AM
  #1  
buddiiee 
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Help with matching Shimano components

Ok, I have Shimano's 2300 STI shifters I guess you call them, and getting the shifting right is kicking my ass. (not used to 'brake lever shifters') There hasn't been a bike that has done this to me in my life so that's why I'm kind of out of options. The catalog specs a Shimano HG40 chain with a SRAM PG-850 cassette but the bike came with a Shimano CS-HG50 cassette and a KMC "Z" chain. It shifted ok (with still a little trim needed) like that, but I wanted to put the proper shimano chain on there (not a huge fan of kmc as well) and that's when shifting got worse. The actual shift quality is out of this world, but **** isn't matching up. It's fine on the 12 and 14 cog, but by the time it's on the third cog up, it's as if I have too much derailleur tension. The shifting just doesn't match. It's either too much or not enough. Where do I find a compatibility chart if there is one? Or, can anyone tell me from experience which cassette works with these shifters?
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Old 10-05-22, 11:26 AM
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Any 8 speed Shimano or SRAM compatible cassette will work. The cassette is not to blame for your shifting issues, unless you have something other than an 8 speed cassette. The CS-HG50 designation was used for cassettes from 6 speed to 10 speed, so that doesn't tell us much without knowing how many cogs are on it.

What rear derailleur is paired with that shifter? You could have a derailleur that is not compatible or you could have the cable routed incorrectly on the derailleur. On some of those derailleurs, routing the cable on the wrong side of the pinch bolt changes the pull ratio.
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Old 10-05-22, 11:55 AM
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Are you running 8-speed shifters with a 9-speed cassette? That'll do what you're describing.
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Old 10-05-22, 01:34 PM
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Originally Posted by dsaul View Post
Any 8 speed Shimano or SRAM compatible cassette will work. The cassette is not to blame for your shifting issues, unless you have something other than an 8 speed cassette. The CS-HG50 designation was used for cassettes from 6 speed to 10 speed, so that doesn't tell us much without knowing how many cogs are on it.

What rear derailleur is paired with that shifter? You could have a derailleur that is not compatible or you could have the cable routed incorrectly on the derailleur. On some of those derailleurs, routing the cable on the wrong side of the pinch bolt changes the pull ratio.
I have 8 cogs with a Shimano Sora rear derailleur. The derailleur's factory.
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Old 10-05-22, 01:43 PM
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I’ve mixed-n-matched Shimano compatible cassettes, chains, and even individual cogs from different mfg’s without any problems. FWIW KMC X chains replaced Z chains and shift better.

Shimano SIS derailleurs are also required, or at least Shimano SIS compatible.

Aside from the incorrect number of cogs or incorrect cog spacing all index systems work the same way. Proper alignment of the derailleur in the starting, index from, position; which is typically outer smallest rear cog and inner chainring.

The other area that can mess up shifting are the cable and housings. If worn or dirty that will impact shifting; although typically more so when releasing the cable and the derailleur spring is the only force.

John
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Old 10-05-22, 01:46 PM
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Originally Posted by buddiiee View Post
I have 8 cogs with a Shimano Sora rear derailleur. The derailleur's factory.
Just wondering 8 cogs from an 8 speed cassette, which is more likely, or 8 from a 9 speed cassette?

Your Sora RD will work as it has the older 1.7:1 actuation ratio.

John
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Old 10-05-22, 02:06 PM
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They're called 'shifters'. Have you checked hanger alignment? Usually this wouldn't cause big problems til the last few largest cogs, but worth checking. Almost sounds like you've got the cable on the wrong side of the anchor bolt. It's very hard to diagnose these things over the interwebs, you should post some photos, you're able to do that. Everything is just a guess til we can see it.
ETA: You've been around for a while, you should know that purely mechanical questions like this should be posted in 'bicycle mechanics' not here in GD.
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Old 10-05-22, 03:01 PM
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Originally Posted by cxwrench View Post
They're called 'shifters'. Have you checked hanger alignment? Usually this wouldn't cause big problems til the last few largest cogs, but worth checking. Almost sounds like you've got the cable on the wrong side of the anchor bolt. It's very hard to diagnose these things over the interwebs, you should post some photos, you're able to do that. Everything is just a guess til we can see it.
ETA: You've been around for a while, you should know that purely mechanical questions like this should be posted in 'bicycle mechanics' not here in GD.
I can snap photos if you need. And for the cables, they're brand new Jagwires I installed.

I actually did consider the mechanics section, but the main thrust of the question was inquiring about a possible parts compatibility website more than anything, which is why I chose this. Can this be moved?
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Old 10-05-22, 05:25 PM
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Your 2300 shifters are compatible with….

- any Shimano compatible 8 speed cassette.
- any Shimano SIS 6 speed to 10 speed (except 74XX and 4700) road rear derailleur.
- any Shimano SIS 6 speed to 9 speed mtb rear derailleur
- nearly all multi-gear 7, 8, 9 speed chains.

I set up a bike for our son with 2300 shifters, 6 speed SIS Deore rear derailleur, 8 speed 105 front derailleur, 7 speed (Shimano & Sunrace mix) cassette spaced to 8 speed, on a 10 speed 105 hub with 7 speed freehub body. I’m running a KMC x8.93 chain. No issues.

Don’t think you need a particular Shimano cassette, chain or rear derailleur to get it to shift well. “Almost” any Shimano with the correct actuation ratios/cable pull will play together.

John

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