's Forum Archives - General

Archive Home >> General(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 )

Quick Question(6 posts)

Quick QuestionJuniorRacerFL
Dec 29, 2001 2:41 PM
Hey i have a Trek 2200 with ultegra which is a 9 speed. But i have a trek 1000 with 8 speed Sora. I need to put the Trek 1000 wheels on my trek 2200 for the time being but it only has 8 cassets. Does that matter since the ultegra is 9 speed? Will it work on my trek 2200? I know thisis a dumb question but i dont know much about bikes.
re: 8 to 9 speedsguido
Dec 29, 2001 9:14 PM
Can't you just trim the rear derailleur adjusting screws so the chain won't drop off the outer or inner cog on the new freewheel? The spacing between cogs is the same with 8 or 9 speeds, isn't it?
Dec 29, 2001 9:23 PM
I'm no Shimano expert anymore, but I believe you can swap the Ultegra cassette onto the Sora freehub - the spacing and freehub carriers should be compatible (they were from Ultegra to 105, unsure about Sora). There is a minor issue with wheel dish (spoke angle on the driveside), but I've been able to swap cassettes in this manner without too much trouble. Watch that the cage of your rear mech clears the spokes when you're in the largest cog on the new setup - if not, simply adjust the upper limit screw on the rear mech a tad to compensate.

I would proceed thus:

1) Borrow a Shimano tool and a chain whip from one of your teammates - any self-respecting bike racer should have these in his / her toolbox.

2) Pop off the Sora lockring by twisting it counterclockwise ("lefty loosy"). Easier said than done. You perform this somewhat annoying task by holding the tool (looks like a nut) in place on the lockring with a wrench. Sit in a drivetrain-grease-resistant chair, and hold the wheel between your knees at an angle so that the tool doesn't fall out of the lockring (if the nut falls off less than twice, you obviously work for the Mavic pro wrench force and don't need my advice). Hold the cassette in place by wrapping the chain whip chain firmly over one of the middle cogs in such a way that you can "scissors" the chain whip handle against the wrench handle, while turning the wrench handle counterclockwise. (this step requires patience and possible use of strong language) The torque of the wrench/tool combo against the cassette (held in place by the whip) will theoretically force the lockring to come loose. Theoretically. If it doesn't come loose with reasonable force (i.e. a bit of shouting and perhaps a scraped knuckle or two) then it's a good bet you're not turning it the right direction.

3) Once you loosen the lockring, the whole affair will come loose and you'll see that it's actually comprised of a fair number of separate fiddly parts. Slide the entire assembly off the freehub body. Toss all the Sora cassette bits into a medium sized Ziploc bag, being careful not to get grease onto your Mom's carpet. You can re-install them later on the Ultegra wheel if desired, but the bag keeps you from losing any of those pesty thin little spacers.

4) Repeat steps 1-3 (sans Ziploc bag) with the Ultegra wheel.

5) Slide the Ultegra cassette onto the Sora body - keeping all the fiddly bits intact, in order and lined up. There's a "key" slot on the freehub body so you can't really install them any way but right side up.

6) If all is well, you will be able to lock down the lockring with the Shimano tool in a clockwise ("righty tighty") fashion. Tighten it a reasonable amount with the wrench, but don't get all macho with it. Remember Step 2? You will have to repeat the whole process to switch it back, and you don't want to strip or seize the threads by overtightening.

7) If all is not well, then the Ultegra cassette will not fit on the Sora body. All is not lost. Merely re-install everything back the way it was, take the tools back to their rightful owner, and cadge a spare 9-speed wheel off of him/her :-)

All told, this process will work much easier than trying to force the wide 8-speed cogs to work with the narrower spec 9-speed chain. You'll have gears that sort of work, but you really won't like the overall effect.

Good luck!
Thanks alotJuniorRacerFL
Dec 30, 2001 3:38 AM
Thanks alot for all the advice lonefrontranger, first thing today im going to go to the LBS and pick up those 2 tools that i need.

Bad news and good newsnee Spoke Wrench
Dec 30, 2001 7:13 AM
The bad news is your 9-speed shifters will not work well with your 8-speed cassette.

The good news is that your 9-speed cassette can be transferred onto your 8-speed rear wheel. Lonefrontranger makes this sould a lot harder to do than it really is, but it does take two bicycle specific tools.
depends on your strength and experiencelonefrontranger
Dec 30, 2001 8:50 PM
If you're a hale male, and an experienced wrench it's a quick job that requires about 30 seconds to do.

If you're both blonde and female, which I am, it gets a little tricky. Assuming I can get the whip seated in the cogs and everything oriented in the correct direction the first time, the torque required to loosen the lockring is sometimes beyond my strength, particularly if some testosterone-laden shop gorilla installed the thing.

It does get easier with experience, however, the first couple times you do this, the coordination skills of keeping the wrench and nut in place while simultaneously keeping the whip taut and in line will cause you to say a few words that only bike mechanics are allowed to use!

I watched one of the juniors parked near us at an ACA race struggle with a cassette removal, tried lending a hand myself, then had to fetch my SO to get the thing off. It had been gorilla-ized.