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How to remove a Shimano MF-TZ21 Multiple Freewheel from my rear wheel

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Take a look at this great tutorial about freewheel removal: http://www.parktool.com/repair/readhowto.asp?id=48
good luck, Al K

Posted on Sep 01, 2010

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Rear hub assembly pacific evolution


Unfortunately, there is only one last ditch effort to free up that freewheel. The following link takes you to a very simplified diagram of how a freewheel works : File Roue libre cliquet svg
What's happening in your instance is that the pawl, colored red, is not engaging the outer teeth, possibly due to corrosion, or age. What you can do is use a penetrating oil to get inside the mechanism to try to free it up. In the following link, you will see a freewheel that is most likely similar to yours: Shimano Hyperglide Freewheel
You want to add oil to the edge of that inner ring that says "Shimano" (yours may not say that), while spinning the cranks to draw the oil in. Hopefully, after a while, and maybe a lot of oil, the pawls will free up and start catching.

Good luck!

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Replaced freewheel hub body on rear wheel ultegra wh-6600, cannot get wheel running, freehub will not run smoothly, even LBS cannot fix and have no ideas. Wheelset only 2 years old and cost 350 quid....


If the lbs can't fix it you could send it back to the manufacture. They will fix it. But keep in mind that if it isn't under warranty it might cost more to fix than replace. Good luck.

Jul 12, 2011 | Shimano WH-6600

1 Answer

Hello could you please advise on how to get the back wheel sprocket off. thanks tony


Depends on whether it is a freewheel or free hub.

For a freehub, you need a chain spanner -- basically a long lever with chain on it to hold the large sprocket while you use a second one to unscrew the smallest cog. Once that is off, all the other cogs slide off.

For a freewheel (usually only on older bikes), if you look inside the smallest cog, you'll see some sort of a recess. On Suntour it would be 2 recesses to accept a 2-pinned removal tool. For Shimano, it is a splined remover that fits around the axle. Insert the freewheel removal tool, use the Quick release to hold it in place, and a large wrench to unscrew the freewheel. In this case the entire freewheel comes off in one piece. Once off, you can use the method for the freehub to remove the outer cog and each successive inner cog. Often it is easier to put the removal tool in a vice and turn the wheel rather than use a wrench.

Feb 28, 2011 | Cycling

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Where can i buy a rear wheel for this bicycle


Bike shop, eBay, Performance Bicycle catalog? Look for a 26-inch MTB wheel with a Shimano 7-speed cassette body on it. If that makes no sense, take it to a bike shop and get it right the first time. They'll also have the special tools to transfer your gears to the new wheel.

Wanna see what's involved?

http://www.parktool.com/blog/repair-help/categories/cassette-and-freewheel-service

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1 Answer

I have a 2007 Specialized s works roubaix. I have a ''clicking sound under load only that ''seems'' to be coming from the crank because it clicks at every rotation of the crank. the bike has about 3500...


I can tell you by my own experience that the click at every rotation is because the bearings on the BB, I had the same in my bicycle and after install a new crankset and BB it went away. I installed a Shimano Deore Hollowtech II and it works nicely and no noise.

May 18, 2010 | Specialized Bicycle Components Specialized...

1 Answer

I can not pedal back and the angle of the lower section is at a 45 degree angle more or less


Make sure your rear derailleur is lined up with one of the rings of teeth on your rear gears( cassette ). Also make sure Your chain is riding correctly on one of the front gears on your crank. If you are still unable to back pedal make sure that one of the cogs (gears) in the rear derailleur arm isn't seized. They must both be able to rotate and the chain should pass through them in a backward S pattern. If you still can't back pedal remove the back wheel or move the chain off the cassette to see if the cassette will freewheel. It has to move freely in a counterclockwise direction in order for you to backpedal. Moving in a clockwise direction engages pawls inside the cassette which lock it into a drive situation which propels the bike. If the cassette will not freewheel in a counterclockwise direction you will need to take the rear wheel to a good bicycle shop to have the cassette replaced. It requires a special tool to remove it. Hope this helps.

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Freewheel on Mavic SSC-SL turns with tire/wheel rotation


Not sure if you ever got a response. I can help with half the issue. These Mavic SSC-SL wheels are a breeze to disassemble the rear hub (I've done so many times). I have these wheels on road bikes AND cross bikes. You DON'T need (nor want to use a vise). Yes, the one side is a 5 mm allen key. While the other side seems like it has nothing, you can actually (with your hand) simply grab the black axle and pull it away/off the hub. It will be a bit stubborn, but trust me, it comes off. There is an O-ring on the inside that simply keeps it sealed and on. Once you have that part off, you now insert a 10 mm allen key. With the 5mm in the other side, you can now twist and remove the entire axle and freehub. Careful, the freehub will now come off the axle, exposing the seals, a washer, AND 2 pawls that are in place by springs. Be careful not to lose the springs.

There's not much to it. Now simply inspect, lube and reassemble. Btw, this is also how you change your wheel from a Shimano hub to a campy hub.

Hope that helps.

Regards,
Corey

Nov 24, 2008 | Mavic Cycling

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