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Short or long cage RD for 1x touring?

Old 04-08-18, 01:42 PM
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Short or long cage RD for 1x touring?

Hi bike forums, I am touring soon on a cross check i set up as a 1x (32t in the front and 8-spd rear) and i was curious if i should switch derailers or not. Right now I have a long cage shimano deore xt but have a short cage shimano 600 that i could use instead.
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Old 04-08-18, 02:02 PM
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Depends what size your largest cog would be, pretty sure the 600 RD is only going to support a 26t, maaaaybe a 28t cog.
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Old 04-08-18, 02:07 PM
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Originally Posted by bipedalism
Hi bike forums, I am touring soon on a cross check i set up as a 1x (32t in the front and 8-spd rear) and i was curious if i should switch derailers or not. Right now I have a long cage shimano deore xt but have a short cage shimano 600 that i could use instead.
Read the specs for your RDs. Shimano typically specifies a. the max tooth size cog and b. the chain take-up capacity (the differences between low and high on front and rear combined). Since this is a 1x, capacity is the difference in cassette only.

I believe your XT RD will work fine and the 600 will not due to cog size limit.

Last edited by seeker333; 04-08-18 at 02:27 PM.
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Old 04-08-18, 02:18 PM
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I have used a short cage RD*, with a 13-34t freewheel .. by not having a chainring difference, the long slack take up is unneeded.


* in my case it was an early 80s <C> chorus





....
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Old 04-08-18, 02:57 PM
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OK, thank you everybody. I'm gonna find out how big my largest cog is and do more research
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Old 04-08-18, 06:16 PM
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Originally Posted by bipedalism
Hi bike forums, I am touring soon on a cross check i set up as a 1x (32t in the front and 8-spd rear) and i was curious if i should switch derailers or not. Right now I have a long cage shimano deore xt but have a short cage shimano 600 that i could use instead.
Whata wrong with the XT that you hope to fix with the 600?
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Old 04-08-18, 09:37 PM
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My attitude when I have the parts in question on hand is to put them on and see if they work. I find that many things work for me that others will say wonít work.
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Old 04-09-18, 07:42 AM
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My thought is that itíll probably work. As mentioned, the fact that you only have one chainring makes a difference. In any case, just put it on and find out(assuming you have a quick link in the chain). You donít have to actually break the chain to test the reach. Just string it around the large cog and chainring, note the links that would need to be put together, then make sure the derailer can take up the slack in the smallest cog on the cassette. If I recall correctly, I ran a 600 tri-color with a 30 tooth rear just fine, but that was long ago and my memory isnít that exact on the details. I will say that Iím certain you can run more than the specs will say you can. Theyíre always conservative with the numbers, likely for legal reasons and accounting for error on the part of people lacking mechanical understanding.

Last edited by 3speed; 04-09-18 at 07:45 AM.
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Old 04-09-18, 10:09 AM
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The only real advantage a 'short' cage has over a 'long' cage is they shift a bit more precise and are lighter. If you have a 1x setup your going to want a big gears in back, really no disadvantage to it, unless your racing which I assume your not since you are posting in the Touring forum.

That long cage is going to allow MTB cassettes where the road one isn't.
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Old 04-09-18, 10:24 AM
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A small wheel , typically on folding bikes , A long cage lower take up pulley gets rather close to the ground..

my 20" wheel, 1 by 14 , has a short cage chain tensioner....


...
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Old 04-09-18, 01:49 PM
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Originally Posted by mstateglfr
Whata wrong with the XT that you hope to fix with the 600?
Nothing is noticeably wrong. I was asking a friend about the differences between short and long derailleurs and based on our conversation I assumed a short derailleur would be better suited for my setup, even if only by a little bit
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Old 04-09-18, 02:16 PM
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Originally Posted by bipedalism
Nothing is noticeably wrong. I was asking a friend about the differences between short and long derailleurs and based on our conversation I assumed a short derailleur would be better suited for my setup, even if only by a little bit
Can you elaborate why he thought it was better suited?
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