If you looking for Mountain Bicycle Rear Derailleur ,si i think this Shimano Tourney 6/7-Speed Mountain Bicycle Rear Derailleur will work with the MegaRange series of freewheels/cassettes. (ones with 30+ tooth first gear and this one I think is rated for a max of a 34 tooth gear)
It gets along with my MegaRange freewheel much better then the old one and has less shifting issues. Old derailleur would not hold 4th gear and would always jump to 5th. I couldn't tighten the alignment any further as a result since it was maxed on on the first gear limit and putting it any further past would derail the chain off the first gear and into the spokes which is bad news.
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This new one does not have that issue and copes well with the new chain and freewheel on the bike. It holds 4th gear and once calibrated, it will shift smoothly. (I am using a Shimano brand 6 speed SIS index shifter which I also got nicely.So for road bikes and perhaps light off-roading, this shifter will definitely hold up. Don't use this for heavy off-roading though. The plastic gears in this derailleur look like they will brake if abused heavily.
Construction is mostly metal housing with plastic gears.
Unless you plan to be crashing into trees while downhill racing this will perform well for almost any rider.
Be sure the set the limiting screws so you can't pull the Shimano Tourney 6/7-Speed Mountain Bicycle Rear Derailleur all the way into the spokes on the rear wheel. I've seen many bikes returned to the store after this has happened, or after the bike is dropped and bends the derailleur.
As another reviewer mentioned, this Shimano Tourney 6/7-Speed Mountain Bicycle Rear Derailleur attaches to the rear wheel axle and is held on by the wheel nut. There is another type that attaches to the frame of the bike near the rear wheel with a bolt that usually takes a 5mm hex bit, but this is less common. Be sure to check which type you need before ordering.
so what do you think about Shimano Tourney 6/7-Speed Mountain Bicycle Rear Derailleur .this is your best chooice for Mountain Bicycle Rear Derailleur or you will find another review about Mountain Bicycle Rear Derailleur?
