Cage Size of Record Rear Derailleur

[puma]

I just want to make sure that I'm purchasing the right cage sized rear derailleur. The formula for these things appears to be:

Computing Capacity:
(Large Chainring - Small Chainring)
+ (Large Rear Cog - Small Rear Cog)
= Capacity

Computing Front Diff.
Large Chainring - Small Chainring = Front Diff.

I run a double 10 speed:

chainrings=54/44T
cogs=11/23T

So my Capacity would be 23 and my Front Diff. would be 10

So looking at the record guidelines:

Short-
Min. sprocket 11t
Max. sprocket 26t
Capacity. 27t
Max. front diff. 14

I should be getting a short, right?

Thanks.

 

[fushman]

yup, definately a short cage dr with that set up

btw thats quite some gearing to have for the bay area, im sure id appreciate it going down hill, but id never be able to get up in the first place!

 

[puma]

Yeah, I know. But, I live in the flatter parts (Stanford/Palo Alto) of the SF area, and I prefer speed over altitude. Thanks for the reply.