Can a Shimano 105 derailer fit on my Next Power Climber :cheer:

It may fit but for what purpose? The 105 is a Road derailleur and are made for 9 or 10 speed rear wheels. The Next bike you are asking about is a six speed rear wheel. The appropriate replacement rear derailleur would be a lot less expensive than a 105 and easier to make work correctly with the rest of your drive train.

Ok, explain what a powerclimber is now...?

my brother got it for christmas it doesnt fit on my bros bike . so its not a waste of money we already have it.

a powerclimber is a type of bike search it on google images!

fail thread..and it might work, but probably not.

Next Power Climber is an X-Mart Full suspension MTB selling for around $75. It uses a six speed drive-train. I'm not sure what shifters you have so it may or may not be compatible but my question is what issue are you trying to solve? Is the current derailleur broken? Are you looking to gain some performance?