What is the cheapest compatable 10 speed shifter I can buy to control a SRAM Apex RD? Only using it on the trainer so I don't care how it mounts.

The chain is on the big ring with no FD, the cassette is 10 speed. Don't plan to use the big/big so would 9 speed shifter work too.

SRAM X5.... Basically any SRAM 10 spd shifter will work.

_________________
Flickr
Tarmac SL3 Project Yellow
Follow on Instagram

What about some old bar end shifter in friction mode?

have a look on the SRAM site - not all shifters are compatible with road rear mechs, from my hazy memory.

from the SRAM website, here are the products that use exact actuation:

500 TT Shifter
900 TT Shifter
DoubleTap® 10 Flat-Bar Road Shifters
DoubleTap® 9 Flat-Bar Road Shifters
SL-700 10 Speed Shifters
SRAM Apex Rear Derailleur
SRAM Force DoubleTap® Controls
SRAM Force Rear Derailleur
SRAM RED Rear Derailleur - 2012
SRAM Red – Black Edition Rear Derailleur
SRAM Rival DoubleTap® Controls
SRAM Rival Rear Derailleur
SRAM X0 10-Speed Front Derailleur
SRAM X0 10-Speed Rear Derailleur
SRAM X0 10-Speed Trigger Shifter
SRAM X0 DH Rear Derailleur
SRAM X0 Silver 10-Speed Rear Derailleur
SRAM X0 Silver 10-Speed Trigger Shifter
SRAM X7 10-Speed Front Derailleur
SRAM X7 10-Speed Rear Derailleur
SRAM X7 10-Speed Trigger Shifter
SRAM X9 10-Speed Front Derailleur
SRAM X9 10-Speed Rear Derailleur
SRAM X9 10-Speed Trigger Shifter
SRAM XX 10-Speed Front Derailleur
SRAM XX 10-Speed Rear Derailleur
SRAM XX 10-Speed Trigger Shifter
X0 TYPE 2 Rear Derailleur
X5 Rear Derailleur
X5 Trigger Shifters
X9 TYPE 2 Rear Derailleur

Thanks, looks like the X7 is fairly economical ($30)