My son broke the derailer on his Columbia mountain bike.
I am a bit confused as to which one to get.
It is a Shimano Tourney derailer.
I have found many options to the derailers, but which one do I get??
Amazon has several for sale and all cheap. Mine does not have any markings to says a part number.
The RD-TX71 looks like it, has the red sprocket.
I picked up a new Columbia Trailhead Sport a few years back and pretty much immediately swapped out the rear derailleur. I have the original one sitting in my parts box in the garage and would be happy to mail it to you for no charge. Send me a private message if you're interested.