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How do I know if I have a short cage or mid cage SRAM Rival rear dérailleur?

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How do I know if I have a short cage or mid cage SRAM Rival rear dérailleur?

Old 08-20-15, 11:35 AM
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How do I know if I have a short cage or mid cage SRAM Rival rear dérailleur?

I want to put on an 11-32 or 12-32 cassette and I know the short cage can only go up to a 28 tooth. I have a 2010 CAAD9-4 with 50/34 crankset and the stock 12-25 cassette.

I also just picked up an 11-23 cassette that I'll use for Crits next year, but on longer, hilly rides I want the 32 T. Even the 28 would be an improvement I know. I also realize I'm going to need two chains; one long for the 11-32 and one short for the 11-23.

May also change out the crankset to 54/39 and longer cranks, but we'll see.

How do I tell which cage length I currently have? They're not marked that I can see. What are the measurements for each?
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Old 08-20-15, 11:38 AM
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google images. Should be fairly obvious from the pic's.

If the two pulleys are close together it's a short cage, if they're more separated its a mid cage;
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Old 08-20-15, 11:49 AM
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Mine look to be further apart than the short cage pictures, but it's hard to tell from that. Anybody know the measured lengths for each?
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Old 08-20-15, 01:05 PM
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You should ask @Alias530.
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Old 08-20-15, 01:28 PM
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Originally Posted by bassjones View Post
I want to put on an 11-32 or 12-32 cassette and I know the short cage can only go up to a 28 tooth. I have a 2010 CAAD9-4 with 50/34 crankset and the stock 12-25 cassette.

I also just picked up an 11-23 cassette that I'll use for Crits next year, but on longer, hilly rides I want the 32 T. Even the 28 would be an improvement I know. I also realize I'm going to need two chains; one long for the 11-32 and one short for the 11-23.

May also change out the crankset to 54/39 and longer cranks, but we'll see.

How do I tell which cage length I currently have? They're not marked that I can see. What are the measurements for each?
You probably don't need a longer cage to run a 32. I have 2 bikes with short cage Shimano derailleurs running 11-32 cassettes. I dunno as much about road SRAM but mountain SRAM is even better than Shimano at exceeding stated max cog size with a little b-tension adjustment.
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Old 08-20-15, 01:43 PM
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Originally Posted by Alias530 View Post
You probably don't need a longer cage to run a 32. I have 2 bikes with short cage Shimano derailleurs running 11-32 cassettes. I dunno as much about road SRAM but mountain SRAM is even better than Shimano at exceeding stated max cog size with a little b-tension adjustment.
It has more to do with chain tension in small-small than b-tension. The closest pulley to the cassette on the derailleur is the same relative location regardless of the cage length.


OP, if you're running 11-speed, I have a med-cage Force22 derailleur for sale in the marketplace... and an 11-32 cassette. Not sure about compatibility with the Rival shifter though.
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Old 08-20-15, 01:48 PM
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Originally Posted by silversx80 View Post
It has more to do with chain tension in small-small than b-tension. The closest pulley to the cassette on the derailleur is the same relative location regardless of the cage length.


OP, if you're running 11-speed, I have a med-cage Force22 derailleur for sale in the marketplace... and an 11-32 cassette. Not sure about compatibility with the Rival shifter though.
Running small/small is ludicrous, pointless, should never happen.

To the OP--I can almost guarantee you that your setup will work with a short cage derailleur, 32 cog, and the right chain length.
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Old 08-20-15, 01:49 PM
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They're fully compatible, but I'm running 10-speed and have fairly expensive (to me anyway) wheels with older 10-speed White Industries hubs so I won't be converting to 11 anytime soon. Thanks though.
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Old 08-20-15, 01:51 PM
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Originally Posted by Alias530 View Post
Running small/small is ludicrous, pointless, should never happen.
True, but cross-chaining still happens. Hell, even in the middle of the cassette and the small ring, a med-cage will prevent the chain slapping the stays, and false shifting from under the crankset.



Originally Posted by Alias530 View Post
To the OP--I can almost guarantee you that your setup will work with a short cage derailleur, 32 cog, and the right chain length.
Don't trust guarantees you didn't pay for... especially coming from the internet.
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Old 08-20-15, 01:54 PM
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Originally Posted by silversx80 View Post
True, but cross-chaining still happens. Hell, even in the middle of the cassette and the small ring, a med-cage will prevent the chain slapping the stays, and false shifting from under the crankset.





Don't trust guarantees you didn't pay for... especially coming from the internet.
Are you in upper management of Shimano or SRAM or something and get bonuses based on revenue?

Why are you so vehemently opposed to running a short cage derailleur with a 32 cog?

In the mountain bike world there are several companies that exist solely to provide 40-45 tooth cassette cogs and tell you how to run them on your derailleur designed for 36 teeth cog max. If it was so dangerous or didn't work, these companies would have been sued into oblivion already.
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Old 08-20-15, 01:56 PM
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...and they're off!

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Old 08-20-15, 02:00 PM
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Originally Posted by Alias530 View Post
Are you in upper management of Shimano or SRAM or something and get bonuses based on revenue?

Why are you so vehemently opposed to running a short cage derailleur with a 32 cog?

In the mountain bike world there are several companies that exist solely to provide 40-45 tooth cassette cogs and tell you how to run them on your derailleur designed for 36 teeth cog max. If it was so dangerous or didn't work, these companies would have been sued into oblivion already.
Quite a lot of assumptions made. I'll take my leave... no point of arguing with an internet superhero.
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Old 08-20-15, 02:00 PM
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Originally Posted by silversx80 View Post
Quite a lot of assumptions made. I'll take my leave... no point of arguing with an internet superhero.
Let me just say one thing... How many bikes do you have where 11-32 on a short cage DIDN'T work? Because I have TWO where it DOES work.

So until you post some REAL WORLD experience of why it doesn't work, you have no credibility and you're just a keyboard warrior trying to start an argument.

Btw I made zero assumptions in my post. I asked two questions and made factual statements about what goes on in the mountain bike world where max cog sizes are exceeded by much larger margins.
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Old 08-20-15, 02:02 PM
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Originally Posted by Alias530 View Post
Running small/small is ludicrous, pointless, should never happen.

To the OP--I can almost guarantee you that your setup will work with a short cage derailleur, 32 cog, and the right chain length.
Good to see that you've (at least) modified this part of your advice to folks.
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Old 08-20-15, 02:15 PM
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Originally Posted by dtrain View Post
Good to see that you've (at least) modified this part of your advice to folks.
It's funny how different forums are from one another. On here, cross chaining is a privilege that should be protected like women being able to vote and you're flamed if you even infer that it's a bad idea. The other forum I'm on, you're flamed if you say you cross chain
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Old 08-20-15, 02:21 PM
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The distance between the two pulleys (measured from the two mounting bolts) is close to 55mm on my Sram Froce (10s) which is also the same for red/rival/apex.
Here is an example;
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Old 08-20-15, 02:51 PM
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Originally Posted by RPK79 View Post
...and they're off!

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Old 08-20-15, 03:12 PM
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Originally Posted by Alias530 View Post
It's funny how different forums are from one another. On here, cross chaining is a privilege that should be protected like women being able to vote and you're flamed if you even infer that it's a bad idea. The other forum I'm on, you're flamed if you say you cross chain
Have fun on the other forum. See ya 'round.
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Old 08-20-15, 03:16 PM
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Originally Posted by Alias530 View Post
You probably don't need a longer cage to run a 32. I have 2 bikes with short cage Shimano derailleurs running 11-32 cassettes. I dunno as much about road SRAM but mountain SRAM is even better than Shimano at exceeding stated max cog size with a little b-tension adjustment.
Then you should refrain from posting. It does no good for you to opine about things you know nothing about; which you have repeatedly done.

I would wager the only reason you're still posting is that there are no mods logged into the Road forum this afternoon.

When it is you alone, versus the rest of the forum in thread after thread, you need to take a look inward.
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Old 08-20-15, 03:19 PM
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Originally Posted by merlinextraligh View Post
I would wager the only reason you're still posting is that there are no mods logged into the Road forum this afternoon.
It is done now: http://www.bikeforums.net/news-annou...l#post18094464
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Old 08-20-15, 03:21 PM
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Originally Posted by dtrain View Post
First poster I've ever reported. Got so sick and tired of it, I forwarded about 40 of his posts.

Any guess on what the sock puppet name will be?
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Old 08-20-15, 03:25 PM
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Originally Posted by merlinextraligh View Post
Any guess on what the sock puppet name will be?
Well the last name was already an alias so...
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Old 08-20-15, 03:28 PM
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Peasant_pedals?
What's_a_Tiagra?
My_crank>your_bike?
Tall_not_Fat?
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Old 08-20-15, 03:31 PM
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Originally Posted by dtrain View Post
Peasant_pedals?
What's_a_Tiagra?
My_crank>your_bike?
Tall_not_Fat?
B-Limit
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Old 08-20-15, 04:09 PM
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Here's a visual of what a wifli RD looks like up close (ignore the filth and muck please). Note the large distance between the pulleys. If yours is smaller, it's likely short cage. This one will reputedly handle 32 teeth on a compact double (which is in fact, what I bought it for and use with it)

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