ok well i got a new bike and its an 8 speed....when i bought the bike i also bought a new LX rear derailleur because it was on sale...what i dint relize was the derailleur was a 9 speed...and my bike is an 8 speed....and of course the guy selling me the bike dint say anything or even realize the bike was an 8 speed....so im stuck here...i figured 1 i could put the derailleur on and adjust it to make it work *if possible?* or try and return it and get an 8 speed online? basically will a 9 speed rear derailleur work just as well on an 8 speed system with out much pain and suffering?
I have a brand new Shimano LX derailluer on my 8speed. it actually depends on your shifters. Most of the time if you have shimano shifters, you will be able to run that derailluer, as long as it is adjusted.
I have a brand new Shimano LX derailluer on my 8speed. it actually depends on your shifters. Most of the time if you have shimano shifters, you will be able to run that derailluer, as long as it is adjusted.
I had an 8spd set up in my bike, it had an Acera deraileur I upgraded to a 9spd Deore and it worked as intended, then I upgraded the rest of the drivetrain to 9spd LX (shifters, cranks, cassette, chain) and kept the same Deore rear deraileur, it works great. BTW I've been told that you can even use a 9spd chain on an 8 spd setup, better chains are available for 9 than for 8. I also am running a Shimano 600 rear deraileur on an 8spd setup on my road Bike, if somewhere in time I upgrade to 10 I'll keep this deraileur since it works very nice.
I have a brand new Shimano LX derailluer on my 8speed. it actually depends on your shifters. Most of the time if you have shimano shifters, you will be able to run that derailluer, as long as it is adjusted.
old STX used to be fitted as 7 or 8 and as it´s cable pull that decides how many gears and thats decided by the shifter .......... eg , old shimano 600 being used on a MTB 9 speed .
so my LX derailleur that is intended for a 9 speed, and even says mega 9 on it will work just as well as an 8 speed LX? because the LX model i have is a 2005 and it just says for 9 speed but the 2004 LX model says that it works 7-9....i wonder if its the same for the new one but just doesnt say it? because i got a killer deal on the LX rear and and get an 8 speed for the same price just have to wait longer...and its a year older...should i stick with my 9 speed rear derailleur and put it on my 8 speed rear set up...*i have avillo speed-trigger shifters and a spram cog...*
so my LX derailleur that is intended for a 9 speed, and even says mega 9 on it will work just as well as an 8 speed LX? because the LX model i have is a 2005 and it just says for 9 speed but the 2004 LX model says that it works 7-9....i wonder if its the same for the new one but just doesnt say it? because i got a killer deal on the LX rear and and get an 8 speed for the same price just have to wait longer...and its a year older...should i stick with my 9 speed rear derailleur and put it on my 8 speed rear set up...*i have avillo speed-trigger shifters and a spram cog...*
~Scott
My Deore has a sticker (mega 9 or something) and it was working fine on the 8spd setup I had. The only thing that comes to my mind that will make it fail is that the 8spd chain wouldn't fit because it could be to wide but I don't think so, differences in chain width from 8 to 9 are very small.
Don't worry about it. A lot of the eight speeds still being sold now have deore 9 speed derailleurs. The shifter dictates the indexing of the RD. If you wanted to upgrade to full 9, youd have to replace the cassette and shifters. Stick with the 8 speed, as it works just fine.
Don't worry about it. A lot of the eight speeds still being sold now have deore 9 speed derailleurs. The shifter dictates the indexing of the RD. If you wanted to upgrade to full 9, youd have to replace the cassette and shifters. Stick with the 8 speed, as it works just fine.
thanks...yeah i just put on the rear derailleur it shifts alot better....just havent tried it out while riding yet...just hand pedaling...but i just discovered my new rear hub is bent..so i need to take of the derailleur and bring it to supergo to get fixxed to reinstall...*incase if they dont allow tampering, they wont know the better*
ughh...having trouble adjusting it just right....i can get it to shift from 8 to 4 but the other gears *1-3* it just wont shift to...i cant figure out why....
....aslo I know someone who will sell my XT rear, LX front and Deore shifters *fr and rr* for 50 bucks....there for a 9 speed system....will they all work with my 8 or should i switch the cassette too?
ughh...having trouble adjusting it just right....i can get it to shift from 8 to 4 but the other gears *1-3* it just wont shift to...i cant figure out why....
....aslo I know someone who will sell my XT rear, LX front and Deore shifters *fr and rr* for 50 bucks....there for a 9 speed system....will they all work with my 8 or should i switch the cassette too?
~Scott
have you replaced the cables and outers recently ? most modern shimano shifters are really sensitive to duff cables as they use a weaker spring than the older units . one symptom is that you can adjust for upshifts or downshifts but not both .
is the chain too long / short ? big ring - small sprocket and the pulleys should be vertically aligned .
yup i did all of that right...i adjusted everything right....and the cables and everything are all brand new...its just stuborn...
~Scott
Dumb question, but have you checked the travel limit adjustment screws? Does it shift into 1/2/3 while you are on ANY of the crank rings, or not at all no matter which chain ring you are on? You don't want it going into 1/2 while on the big ring anyway, since that will wear out your chain really quick
On a similar note, how well/poorly will a 9 speed chain, shifter and derailleur work with an 8 speed cassette?
A 9 spd shifter will work poorly with an 8 spd cassette. You can set it up to work at part of the cassette, but probably not across all of the sprockets. The indexing distance is wrong, and the fault grows with each sprocket you traverse. It won't matter at all for the RD, since the jockey wheels keeps the chain centered in the cage anyhow. In theory it could matter a tiny bit for the cassette, since a narrower chain has to travel longer in order to snag and transfer to the next sprocket. It might matter more on the FD, since that one actually makes contact with the sides of the chain. A narrower chain here means that the FD has to travel longer to move the chain than it would have to do on a wider chain. Usually it's not that critical though.
