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-   -   Changing cassettes (https://www.bikeforums.net/road-cycling/485795-changing-cassettes.html)

Miller2 11-12-08 01:41 PM

Changing cassettes
 
What tools do I need to accomplish this....chain whip and cassette tool? Are the cassette tools universal or specific for 9/10 speeds? I assume the chain whip is universal.

umd 11-12-08 01:43 PM

Chain whip, cassette tool, and a wrench. I've used the same tool for 9 and 10 speed.

Namenda 11-12-08 01:44 PM

To remove, chain whip and cassette lockring tool. To install, just the lockring tool. The tool is different for Shimano/SRAM and Campy I believe.

botto 11-12-08 01:45 PM


Originally Posted by Miller2 (Post 7837896)
What tools do I need to accomplish this....chain whip and cassette tool? Are the cassette tools universal or specific for 9/10 speeds? I assume the chain whip is universal.

correct.

pathdoc 11-12-08 01:46 PM

I believe the Shimano cassette tool will work with either lockring, the 9 or 10, they may even use the same lockring.
Of course Campy has a different tool specific for their lockrings.
A chain whip is used to hold the cassette in place while you unscrwew the lockring. No other tools needed except a crescent wrench so you will have leverage to unscrew ring.
Will take less than 5 minutes. Just make sure you put all you spacers in the proper place.

emcb1230 11-12-08 01:48 PM


Originally Posted by Namenda (Post 7837907)
To remove, chain whip and cassette lockring tool.

A wrench is helpful if the lockring is too tight.

As far as I know the chainwhip is universal. Anybody grease the threads on the lockring?

Miller2 11-12-08 01:51 PM

Thanks!!

haimtoeg 11-12-08 01:52 PM

Torque wrench helps if you have access to it - you have to be able to tighten the lockring on the new cassette to 50Nm, which is pretty tight and more than I considered enough the first time I did it.

Miller2 11-12-08 01:57 PM


Originally Posted by haimtoeg (Post 7837975)
Torque wrench helps if you have access to it - you have to be able to tighten the lockring on the new cassette to 50Nm, which is pretty tight and more than I considered enough the first time I did it.

I do need a torque wrench. Have not been able to find one locally that reads in NM. Where can I get one for a reasonable price?

merlinextraligh 11-12-08 01:58 PM


Originally Posted by haimtoeg (Post 7837975)
Torque wrench helps if you have access to it - you have to be able to tighten the lockring on the new cassette to 50Nm, which is pretty tight and more than I considered enough the first time I did it.

The torque spec is "crank on it till you get a clicking sensation" alternatively defined as "give it some elbow grease."
I don't understand the need for a torque wrench on something you're supposed to crank down tight, and can't really overtorque.

Miller2 11-12-08 02:00 PM


Originally Posted by merlinextraligh (Post 7838014)
The torque spec is "crank on it till you get a clicking sensation" alternatively defined as "give it some elbow grease."
I don't understand the need for a torque wrench on something you're supposed to crank down tight, and can't really overtorque.

Well perhaps not for that application but surely a torque wrench is usefull elsewhere on the bike.

Namenda 11-12-08 02:02 PM


Originally Posted by emcb1230 (Post 7837943)
A wrench is helpful if the lockring is too tight.

I have freakishly strong hands...no wrench necessary. :D

emcb1230 11-12-08 02:26 PM


Originally Posted by Namenda (Post 7838058)
I have freakishly strong hands...no wrench necessary. :D

Not me, 6'5" and born with terribly small girlish hands. embarassing...

Scorer75 11-12-08 02:30 PM

No torque wrench needed, crank till you hear the click.

9 and 10 speed Shimano use the same tool.

A trick I use that I picked up at a bike shop is to put the cassette lockring tool in a vise, then place the wheel on the tool, and use the chainwhip. I don't always use it, but if the vise is on the bench, why not?

StanSeven 11-12-08 02:51 PM

In case you don't know, you probably should replace the chain at the same time.

floriderron 11-12-08 02:55 PM

Tools
 
You'll need a chain whip and a FR-7 Park tool. Bicycle.com has a good video about chainging out cassettes.

nycphotography 11-12-08 03:10 PM

I get by with just the cassette tool. Instead of chainwhip I grab the cassette with a pair of channel locks and a rag.

It works. But you have to be good with channel locks (ie know which way automatically grips under torque) and careful to keep from shaving down a sprocket tooth.

zacster 11-12-08 03:31 PM

You don't need the chainwhip if you have an old chain. Put the tool in the vise facing up, put the wheel and cassette on the tool, wrap the chain around the cogs, put your hand through the spokes and wrap the chain around your hand (use a rag), grab the rim and turn the wheel counter clockwise. It helps to have the chain in position to pull as you turn. You've basically created a chain whip with your hand. It isn't even as hard as this sounds.

Wanderer 11-12-08 03:49 PM

We used to have a guy named Hank at the local gas company.

When tightening 4" threaded steel pipe into a fitting, we used 4' pipe wrenches with 6' cheaters.

We'd tighten it as far as humanly possible, and then tell Hank to take it around one more time.

Hank would grab the wrench, sans cheater, and do as requested to line it up.

I think he could strip just about anything.............

haimtoeg 11-12-08 04:32 PM


Originally Posted by merlinextraligh (Post 7838014)
The torque spec is "crank on it till you get a clicking sensation" alternatively defined as "give it some elbow grease."
I don't understand the need for a torque wrench on something you're supposed to crank down tight, and can't really overtorque.

I did not say it was "needed", I said "helps". The torque spec for Campy cassettes is 50Nm, if you use a torque wrench you'll see the relatively big gap from the start of the clicking sensation to the specified torque.

haimtoeg 11-12-08 04:34 PM


Originally Posted by Miller2 (Post 7838004)
I do need a torque wrench. Have not been able to find one locally that reads in NM. Where can I get one for a reasonable price?

50Nm is about 37ft lb. There are many places that sell inexpensive tools on the web, I got mine at Sears.

GP 11-12-08 04:50 PM

Mine has a conversion table on the back of the manual. To convert from lb.ft to n.m, multiply by 1.356

Whoops, I had to edit it. I should wear my glasses when reading little print.

Grumpy McTrumpy 11-12-08 04:54 PM

my lockrings all say 40Nm. 28 foot pounds. Do not overtighten it.

Miller2 11-12-08 04:57 PM


Originally Posted by StanSeven (Post 7838510)
In case you don't know, you probably should replace the chain at the same time.

Why?

nycphotography 11-12-08 05:30 PM


Originally Posted by Miller2 (Post 7839533)
Why?

If you're replacing a WORN OUT cassette, then yes, chain and probably chain rings as well.

Changing cassette sizes for better gearing... you don't have to replace chain, but you should verify that you have enough slack to get into the big/big combo and that you still have tension in the small/small combo.


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