Mountain Bike Cassettes

18 speed mountain bike gear & brakes combined?
i have a 18 speed Mountain bike & i am looking for a brake & gear lever combined don’t like the twist grip gears that are on the bike at the moment but every one i have seen is for bikes with more than 6 gears on the rear cassette please can some one point me in the right direction thanks
You may be able to put a 7 speed freewheel on the rear hub. I have a 18 speed bike and the freewheel looks to be the same width as my 7 speed one. The gears are a little closer together but it should work with 7 speed rapid fire trigger shifters.
Rear Cassette wobble on mountain bike

