|   9 speed Cranks 8 speed system? | have_a_?
Feb 19, 2002 6:01 AM | | My crank is shot. I would like to upgrade to the LX Hollowtech (m571) my question is this: My existing drive train is 8 speed Shimano components (xt front, xtr rear, lx cassette) Because the new crank is a mega 9 speed system will it work with my existing front and rear deh's? Cassette? Chain?
Thanks in advance!!! |
| Should work fine | Phillip
Feb 19, 2002 7:27 AM | | The 8 speed front deurailler might not shift quite as well as a 9 speed and you should run a 9 speed chain. Try it first with just the 9 speed chain and see how the front shifts. I run a similar set up and can recommend the Sram PC69 chain. |
| Don't run a 9 speed chain. | Rookie
Feb 19, 2002 7:41 AM | | It won't work w/an 8 spd cassette. The chain is too thin, an 8 spd chain will work just fine. That way your'e not spending extra money on a new chain. |
| Yes it will. | Rookie
Feb 19, 2002 7:38 AM | | This shouldn't give you any problem.
You will have to replace the bottom bracket with one of the new splined models because of the new splined crank design.
consult your LBS for correct bottom bracket sizing.
And please don't mail order. Your LBS needs your business, especially this time of year. (help feed a starving bike mechanic.) |
| Rookie's answer is exactly why you can shop mail order... | næstep
Feb 19, 2002 7:54 AM | | ...and not feel guilty (or maybe I should say, "not feel bad about staying out of Rookie's LBS"). Not only will pay him twice the price, he'll give you bad advice to boot.
Not only is it ok to run a 9 speed chain on an 8 speed cassette, Shimano goes so far as to recommend it. I've run this same setup with a 9 speed LX crank, 8 speed XT cassette, and a Sram PC-59 chain for two seasons without a problem. Shifting remained flawless. What you might find by using an 8 speed chain is light chain rub on the higher profile pick-up ramps on the 9 speed chainrings.
Your 8 speed derailleurs will be fine.
When choosing an ES70 bottom bracket, you'll generally want to pick a spindle length longer than what you're using now to keep your existing chainline (i.e. 110mm square = 113mm splined).
næstep |
| My bad | Rookie
Feb 19, 2002 8:38 AM | | I asked someone who said they knew the answer and as for naestep.-You are an ass. (and I appologize for the bad info.) I think that going to your LBS is the only way to bring down there prices. That cheap SOB and others like him are the exact reason's the price can sometimes be more at your LBS.
If you give the majority of your bussiness to your LBS I think you'll find that they will discount thing's for you. I don't know about anyone else, but I have found that it can be quite difficult to test ride a bike or even look at an accessory over the phone or on a computer. and just try returning an item to those bastards. It has taken certain mail order companies up to 1 month to complete returns or exchanges for me. ( II would consider that bad service) andif I have to pay 10-20 percent more for descent service than sooooo be it. |
| To each their own, but... | næstep
Feb 19, 2002 9:36 AM | | ...I don't know how I can "a cheap SOB" for watching my pennies, but I suppose that's the kind of "deal with it" attitude I should learn to expect. Point of fact: $110 retail for an LX crankset at my local shop vs. $40 on sale at Performance, would you really pay retail? $55 for a headset I can get for $30 online? I can draw a long list of comparisons that adds up to big bucks.
I certainly couldn't partonize only one local shop, because I've usually got to call around to find a part in stock that I need. I have no problem boxing something up and shipping it back for a refund or exchange, and have done so a number of times without problems. Compared to the grief some local shops give me, it's worth it.
Then we get to the bad advice: you wouldn't believe the number of shops that tried to sell me new bikes when I told them I was looking for a 1" fork for my wife's bike (I finally did find one at a local shop, and happily paid too much for it). Nobody at my LBS offered to explain the chainline differences between my ES70 BB and the square taper it was replacing. When I got my first suspension fork back in '96, a shop sold me wheel bearing grease to service it with. So take your pick: bad advice or no advice.
And as far as being "an ass" for correcting you: You were wrong; deal with it.
næstep |
| Take it easy | Rookie
Feb 19, 2002 10:03 AM | | The shops around you must be really pricy. The LBS I frequent isn't that bad as far as prices go. An lx crank at MY LBS would run right around $55-$60. I understand about the bad info from some Bike shops. I guess it just depends on where you go and who you ask while you're there. What do you expect for $6.00 an hour? Rocket Science?
You are correct about the in stock issue at shops. But There are a lot of mail order co's that run out of many popular items in the middle of spring. Some shops do suck, but not all of them. Sorry for the name calling. I was just screwin around w/that. I have a couple of 96' Judy's w/1" steerer tubes, one is threaded and one is threadless.
ya shoulda asked. Wheel bearing grease is also good for chains and derailers. "lol" |
| Well then I wish I would have called you... | næstep
Feb 19, 2002 10:18 AM | | ...because (this is two or three years ago) I got stuck paying a bit more than $100 for an RST 281 or 381, including the cutting and threading of the steerer. I knew it was a bargin basement fork and that I was paying a little too much for it, but the free labor more than made up for it. But at that point I would have paid a little bit more for a Judy-level fork (but the wife's happy with the RST so everything worked out).
næstep |
| re: 9 speed Cranks 8 speed system? | The Weasel
Feb 19, 2002 10:17 AM | | have the exact setup on same bike. the combo works great. didn't know about the chain thing, but make sure your BB is sized right. try an LBS. If you've done business with them in the past there's no reason you shouldn't get a price break, but the only way to know is ask. install it your self, not to hard. |
| Old Chain on New Crank? | Porter
Feb 19, 2002 3:38 PM | | Don't know if it's just me but I would not run brand new crank on an old chain and casette. My guess is that if your crank is worn out your chain is probably also a bit worn. Running a worn chain on new sprockets will reduce their life expectancy. You may also want to consider a new chain and casette. Just a thought, good luck!!! |
| chain suck warning! | airwreck
Feb 19, 2002 11:02 PM | | using an 8sp. chain with a 9sp. Shimano Crank is likely to cause chain suck. Been there, done that. Had to fit a 8sp. middle ring and spacers to the crank to make it work.
Eric |
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