Originally Posted by
70sSanO
I didn’t spend much time. Went to Giant website for AR3 and it showed 11-34 and checked 9 speed 11-34.
I didn’t check if it was Sora or not. If you only get 11-30, you’ll need to check the rear derailleur max cog/capacity of the one on the AR3.
My 9-speed is 11-32 (11, 12, 14, 16, 18, 21, 24, 28, 32). I "think" my Claris bike is 11-30 but I'd have to look to be sure.