Convert 9 speed drive to 8 speed question
Discussion
I would like to change my 9 speed drive to 8 speed because these chains and casettes are cheaper. My rear derailleur is shimano deore shadow for 9 speed, i have read that rear derailleur shoud work because it's the shifter that need to pull enough cable so i will need to change shifter only. I don't know how it is with front derailleur. In the front i have shimano alivio derailleur and 3 sprockets, will the sprockets be enough far so that thicker 8 speed chain won't be rubbing other sprockets next to it ? Do u have some experience with that ? Does the only thing i need to change is shifter ? Is it going to work well ?
slawek371 said:
I would like to change my 9 speed drive to 8 speed because these chains and casettes are cheaper.
?!You want to make your bike "worse" (at considerable expense) to use parts that are only very slightly cheaper but more obsolete?
It might be cheaper/easier to go to 10 speed frankly!
I make the OP correct - We don't need all these ratios and extra expense. If it's a Shimano freehub you could buy an 8 speed cassette and chain, and the rear derailleur may work (especially if you clamp the cable on the other side of the clamp bolt. We are only talking fractions of a mm on the shift distance between sprockets. I can't remember the measurements, but if you look on the Sheldon Brown site there's some good info - you may need a small spacer so the lockring doesn't bottom out before it clamps the sprockets.
I use a 7 speed, and now the cassettes are difficult to get hold of I just buy 8 speed ones, use the spacers off the 7 speed ones, and leave off the largest sprocket - works a treat.
Edit for clarification...... I'm sure the derailleur will work, what I should have said it that the changer MAY also work, with the cable clamped slightly different (eg on other side of clamp bolt) Just ignore the 1 or 9!
I use a 7 speed, and now the cassettes are difficult to get hold of I just buy 8 speed ones, use the spacers off the 7 speed ones, and leave off the largest sprocket - works a treat.
Edit for clarification...... I'm sure the derailleur will work, what I should have said it that the changer MAY also work, with the cable clamped slightly different (eg on other side of clamp bolt) Just ignore the 1 or 9!
Edited by Fastpedeller on Tuesday 22 July 17:35
Extra expense? WTF?!
9 Speed cassete: 10.99 http://www.chainreactioncycles.com/shimano-deore-a...
9 Speed chain: 7.85 http://www.wiggle.co.uk/shimano-hg53-9-speed-chain...
Replace once a year at most. Are you seriously concerned about < 20 quid once a year, and how much cheaper do you think 8 speed will be?
9 Speed cassete: 10.99 http://www.chainreactioncycles.com/shimano-deore-a...
9 Speed chain: 7.85 http://www.wiggle.co.uk/shimano-hg53-9-speed-chain...
Replace once a year at most. Are you seriously concerned about < 20 quid once a year, and how much cheaper do you think 8 speed will be?
slawek371 said:
(eg on other side of clamp bolt) Just ignore the 1 or 9!
On the other side of clamp bolt ? Do you mean to rotate cable 180 degrees or screw clamp bolt on the other side of derailleur ?
The second...... But only if that works of course. The idea is that for the movement at the 'hand control' end the movement at the derailleur end is a bit more - all to do with the effective leverage. Sheldon Brown is your source document!.....On the other side of clamp bolt ? Do you mean to rotate cable 180 degrees or screw clamp bolt on the other side of derailleur ?
upsidedownmark said:
Extra expense? WTF?!
9 Speed cassete: 10.99 http://www.chainreactioncycles.com/shimano-deore-a...
9 Speed chain: 7.85 http://www.wiggle.co.uk/shimano-hg53-9-speed-chain...
Replace once a year at most. Are you seriously concerned about < 20 quid once a year, and how much cheaper do you think 8 speed will be?
Equivalent prices for 8 speed cassette 7.999 Speed cassete: 10.99 http://www.chainreactioncycles.com/shimano-deore-a...
9 Speed chain: 7.85 http://www.wiggle.co.uk/shimano-hg53-9-speed-chain...
Replace once a year at most. Are you seriously concerned about < 20 quid once a year, and how much cheaper do you think 8 speed will be?
and 7/8 speed chain 5.99
total 9 speed is 18.84, 8 speed is 13.98 - so a 35% mark up, or 25% saving (whichever way you want to look at it
)I have to say the 9 speed gear has come down in price to previously - still won't tempt me to buy something I don't need, and which is not as strong.
Fastpedeller said:
Equivalent prices for 8 speed cassette 7.99
and 7/8 speed chain 5.99
total 9 speed is 18.84, 8 speed is 13.98 - so a 35% mark up, or 25% saving (whichever way you want to look at it)
I have to say the 9 speed gear has come down in price to previously - still won't tempt me to buy something I don't need, and which is not as strong.
If 10 (and 11 even) is strong enough for the likes of the pro boys, you really don't need to worry.and 7/8 speed chain 5.99
total 9 speed is 18.84, 8 speed is 13.98 - so a 35% mark up, or 25% saving (whichever way you want to look at it
)I have to say the 9 speed gear has come down in price to previously - still won't tempt me to buy something I don't need, and which is not as strong.
If you want to bodge it for the sake of 5 quid a year.. that blows my mind..
Good luck, and happy pedaling.
No, i'm not trolling. I'm from Poland and found out 8 speed drive to be much cheaper than 9 speed. On polish auction page there is:
The cheapest are:
8 speed casette + chain for --> 46 zł(polish currency 3zł = 1 dollar)
http://allegro.pl/zestaw-kaseta-shimano-hg-31-32t-...
and
speed casette + chain for --> 99 zł (but many are for about 120 zł)
http://allegro.pl/zestaw-kaseta-shimano-hg-30-32t-...
8 speed is more than 2 times cheaper, since february this year i replaced drive and made 6 000 km, i see now that i will have to replace it agin soon and it's just half a year, i'm using now 3 chains and replace them every 1000 km but i think that it doesn't really help because i ride a lot on pavement and i'm using the same 3 sprockets on casette so they are worn the most and soon chain can leap over sprockets teeths. Chains will be in quite good condition but casette will be worn out so i will have to buy a new casette and won't be able to use old 3 chains because they are too streched and won't fit new casettes teeths. As i ride a lot i thought that i could buy 8 speed and it would be cheaper. I'm just worried if it will work well.
The cheapest are:
8 speed casette + chain for --> 46 zł(polish currency 3zł = 1 dollar)
http://allegro.pl/zestaw-kaseta-shimano-hg-31-32t-...
and
speed casette + chain for --> 99 zł (but many are for about 120 zł)
http://allegro.pl/zestaw-kaseta-shimano-hg-30-32t-...
8 speed is more than 2 times cheaper, since february this year i replaced drive and made 6 000 km, i see now that i will have to replace it agin soon and it's just half a year, i'm using now 3 chains and replace them every 1000 km but i think that it doesn't really help because i ride a lot on pavement and i'm using the same 3 sprockets on casette so they are worn the most and soon chain can leap over sprockets teeths. Chains will be in quite good condition but casette will be worn out so i will have to buy a new casette and won't be able to use old 3 chains because they are too streched and won't fit new casettes teeths. As i ride a lot i thought that i could buy 8 speed and it would be cheaper. I'm just worried if it will work well.
That makes more sense, but something seems a bit odd.
I don't think I understand what you're doing with the 3 chains, swapping / rotating them every 1000km, same 3 chains? If so, why?
For comparison, I run 10 speed (Shimano 105 chain & cassettes as they're cheapish). I just put a new chain on after 5000km, but it was only maybe 60% worn, not bad. I also had a new cassette - that had something like 10,000km on it, looked / worked fine, but I felt like I should!
Chain gets wiped down / cleaned occasionally and lubed with 3-in-1 (light machine oil), otherwise nothing much, just ride.
I don't think I understand what you're doing with the 3 chains, swapping / rotating them every 1000km, same 3 chains? If so, why?
For comparison, I run 10 speed (Shimano 105 chain & cassettes as they're cheapish). I just put a new chain on after 5000km, but it was only maybe 60% worn, not bad. I also had a new cassette - that had something like 10,000km on it, looked / worked fine, but I felt like I should!
Chain gets wiped down / cleaned occasionally and lubed with 3-in-1 (light machine oil), otherwise nothing much, just ride.
I bought 3 chains and swap them because i have read and been told that it makes drivetrain life longer. Chains are streching with time and streched chain makes sprocket teeths disapper quicker.
Last time someone told me that in my case it doesn't make sense because i'm riding mainly on plain roads using only 2 or 3 same sprockets on casette so i have 3 sprockets worn out and the rest are in good condition. Anyways i will have to buy new drivetrain because chain will start to leap over worn teeths and i can't use my old 3 chains on new casette because these 3 chains are worn enough so it won't fit new casette so i will have to discard all.
I decided that i will buy now just one chain and one casette and i would like to buy 8 speed because it's 2x cheaper in Poland. So i know now that rear derailleur should work and even shifter can work, someone told me that front derailleur should work too but what about crankset sprocets. My crankset is made for 9 speed chain, it's shimano alivio m430 ---> http://www.ebay.com/itm/Shimano-Alivio-FC-M430-175...
Is it going to work with 8 speed chain ?
Last time someone told me that in my case it doesn't make sense because i'm riding mainly on plain roads using only 2 or 3 same sprockets on casette so i have 3 sprockets worn out and the rest are in good condition. Anyways i will have to buy new drivetrain because chain will start to leap over worn teeths and i can't use my old 3 chains on new casette because these 3 chains are worn enough so it won't fit new casette so i will have to discard all.
I decided that i will buy now just one chain and one casette and i would like to buy 8 speed because it's 2x cheaper in Poland. So i know now that rear derailleur should work and even shifter can work, someone told me that front derailleur should work too but what about crankset sprocets. My crankset is made for 9 speed chain, it's shimano alivio m430 ---> http://www.ebay.com/itm/Shimano-Alivio-FC-M430-175...
Is it going to work with 8 speed chain ?
slawek371 said:
I bought 3 chains and swap them because i have read and been told that it makes drivetrain life longer. Chains are streching with time and streched chain makes sprocket teeths disapper quicker.
Last time someone told me that in my case it doesn't make sense because i'm riding mainly on plain roads using only 2 or 3 same sprockets on casette so i have 3 sprockets worn out and the rest are in good condition. Anyways i will have to buy new drivetrain because chain will start to leap over worn teeths and i can't use my old 3 chains on new casette because these 3 chains are worn enough so it won't fit new casette so i will have to discard all.
I decided that i will buy now just one chain and one casette and i would like to buy 8 speed because it's 2x cheaper in Poland. So i know now that rear derailleur should work and even shifter can work, someone told me that front derailleur should work too but what about crankset sprocets. My crankset is made for 9 speed chain, it's shimano alivio m430 ---> http://www.ebay.com/itm/Shimano-Alivio-FC-M430-175...
Is it going to work with 8 speed chain ?
That will work ok.Last time someone told me that in my case it doesn't make sense because i'm riding mainly on plain roads using only 2 or 3 same sprockets on casette so i have 3 sprockets worn out and the rest are in good condition. Anyways i will have to buy new drivetrain because chain will start to leap over worn teeths and i can't use my old 3 chains on new casette because these 3 chains are worn enough so it won't fit new casette so i will have to discard all.
I decided that i will buy now just one chain and one casette and i would like to buy 8 speed because it's 2x cheaper in Poland. So i know now that rear derailleur should work and even shifter can work, someone told me that front derailleur should work too but what about crankset sprocets. My crankset is made for 9 speed chain, it's shimano alivio m430 ---> http://www.ebay.com/itm/Shimano-Alivio-FC-M430-175...
Is it going to work with 8 speed chain ?
On my old Rockhopper I run an eight speed shifter against a seven speed cassette using a seven/eight speed derailleur. All Shimano.
The reason is that I built one bike from two.
The shift increments are the same.
All I did was adjust the derailleur so that it started on the smallest outer cog and stopped on the inner cog.
The reason is that I built one bike from two.
The shift increments are the same.
All I did was adjust the derailleur so that it started on the smallest outer cog and stopped on the inner cog.
Gassing Station | Pedal Powered | Top of Page | What's New | My Stuff