Another Derailleur Question

I

ikedawilliams

Speeding Up
Oct 15, 2010
669
10
38
#1
I want to order a compact double 10 speed chainset (50/34 and 12/25), but don't know if I should go with a short or medium cage length rear derailleur. Any advice would be helpful. Cheers.
 
AlanW

AlanW

Maximum Pace
Jan 30, 2007
1,214
436
103
Tokyo
#2
Short cage will cover that range. I have 34/50 and 12-27 running on short cage in every gear.
 
FarEast

FarEast

Maximum Pace
May 25, 2009
5,528
538
193
Yokohama
#4
It will also happily cover 53/28 as well :D
 
GSAstuto

GSAstuto

Maximum Pace
Oct 11, 2009
945
242
103
tokyo
www.roadfixie.com
#5
I'm using 36/46 with 11-32 on my CX. Standard cage Tiagra. No issues.
 
ProRaceMechanic

ProRaceMechanic

Maximum Pace
Dec 31, 2009
906
87
48
Matsumoto
#7
Campag

Are you running Campy?
Up to 29 teeth is fine on Campy short cage rear derailleur according to the parts distributor from the shop I worked at. A medium or long cage suits a triple crank. If you cross chain often from your 50 to your 25 you may want a medium cage. It gives you a little more chain to work with. (you will need a new chain if you go medium cage) and this will be better for the longevity of your derailleur and keep the stress off your rear derailleur hanger(if you cross chain)
Generally speaking like everyone says you will be fine with a short cage. I run a med cage on my Campy cross bike, I sometimes end up in my 48 27 combo when I am in the red a few laps in. I have a long cage on my Campy triple set up. I also have run a short cage on my triple as with no shifting problems though. Thats not to say the derailleur wasnt twisted in some combos.
 
I

ikedawilliams

Speeding Up
Oct 15, 2010
669
10
38
#8
I was thinking Campy. Thanks everyone for the info. Much appreciated.