how to identify a rear derailleur that goes with a 6 speed megarenge?
#1
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how to identify a rear derailleur that goes with a 6 speed megarenge?
can i fit any rear derailleur on a 6 speed freewheel or does the rear derailleur has to be labeled 6.
what about the shifting manettes?
tx
what about the shifting manettes?
tx
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#4
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You didn’t mention in the OP...is this an indexed or friction shifting system? If it’s friction...you should probably be able to use just about any derailleur.
Dan
Dan
#5
Really Old Senior Member
6/7 speed has wider cogs, spacing & chain than 8 & above.
Just get a Shimano Tourney.
DER's for 8 & above start to get narrower and are more prone to chain rub.
Just get a Shimano Tourney.
DER's for 8 & above start to get narrower and are more prone to chain rub.
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Yes. But I wouldn’t go that far down the Shimano line. Altus is low enough without going into the sewer.
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#7
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hi are you saying that investing a bit more money is not worth the quality of alivio or other higher that tourney. Im curious if you could share us what you base your legitimate opinion, it would bring clarity to me tx
#8
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#9
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about tourney are you saying additional investment is not worth it?
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I would say that spending money on the Tourney is just wasted money. The secondary market Tourney is slightly better then what you’ll find on HelMart bikes but only slightly. I’ve worked on a lot of Tourneys and they are all rather flexible. Flexible and precise index shifting don’t go to together all that well. Alivio and higher derailers are stiffer and work better. Tuning them to shift well is just easier.
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I agree that an Alivio or Acera mtb rear derailleur would be a good choice. If you have access to a good mtb rear derailleur from the 90’s that will also work.
Basically any 6-9 speed SIS mtb rear derailleur will work. There is no concern about cage width. KMC sells their X8/X8.93 chain for 6/7/8 speed cassettes. I run this chain through 9 speed rear derailleurs for 7/8 speed setups without any issues.
John
Basically any 6-9 speed SIS mtb rear derailleur will work. There is no concern about cage width. KMC sells their X8/X8.93 chain for 6/7/8 speed cassettes. I run this chain through 9 speed rear derailleurs for 7/8 speed setups without any issues.
John
#12
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I would say that spending money on the Tourney is just wasted money. The secondary market Tourney is slightly better then what you’ll find on HelMart bikes but only slightly. I’ve worked on a lot of Tourneys and they are all rather flexible. Flexible and precise index shifting don’t go to together all that well. Alivio and higher derailers are stiffer and work better. Tuning them to shift well is just easier.
im not clear if aliexpress is second market or if shimano is ?
do you mean whatever comes stock with a new bike is lesser quality than a piece of the same name an companie bought separately?
Are you guys saying that whether i choose a claimed 7 rear derailleur or a 9 or 10 or 12 it does not change anything? they will all work well with a 6 speed?
wouldn't that be safer to choose a claimed 7/6-speed
like this one does not say 6 speed it says SHIMANO Alivio M3100 RD-M4000 27 Speed RD M4000 Mountain Bike Shadow 9-speed Rear Derailleur m3100 new model of m4000
would it work well for 6speed??
https://www.aliexpress.com/item/33054482054.html?spm=a2g0o.cart.0.0.11d43c00psAykd&mp=1
#13
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You need to read and THINK before you keep tossing questions back.
This isn't Siri!
This isn't Siri!
#14
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HelMart bikes (aka Big Box Store) bikes have even lower quality Tourney rear derailers than what you can buy in the after market. After market Tourney is almost okay but it is still a rather flexible derailer. A stiffer derailer (Alivio and above) is more precise and easier to tune.
Are you guys saying that whether i choose a claimed 7 rear derailleur or a 9 or 10 or 12 it does not change anything? they will all work well with a 6 speed?
that be safer to choose a claimed 7/6-speedlike this one does not say 6 speed it says SHIMANO Alivio M3100 RD-M4000 27 Speed RD M4000 Mountain Bike Shadow 9-speed Rear Derailleur m3100 new model of m4000
https://www.aliexpress.com/item/33054482054.html?spm=a2g0o.cart.0.0.11d43c00psAykd&mp=1
that be safer to choose a claimed 7/6-speed
like this one does not say 6 speed it says SHIMANO Alivio M3100 RD-M4000 27 Speed RD M4000 Mountain Bike Shadow 9-speed Rear Derailleur m3100 new model of m4000
would it work well for 6speed??
https://www.aliexpress.com/item/33054482054.html?spm=a2g0o.cart.0.0.11d43c00psAykd&mp=1
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In order for a derailleur to work on a 6 speed freewheel you will of course have to use a 6 speed shifter. If you don't currently have a 6 speed shifter you will have to buy one
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And you should probably talk to the mechanic who is going to install the components for you.
John
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Or just let the mechanic source the proper parts.
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#18
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seems like part of you is insatisfied . sorry for that . since there are many questions, a consider your comment only as semi pertinent. Also asking for a confirmation is an act of gentlement utilizing his pesos wisely if it can reassure you.
#19
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The equipment that comes on a bike is called OEM which stands for “original equipment manufacturer”. Ignoring the tortured grammar (would a comma kill ya), OEM just means what comes on the bike. A “secondary market” would be if you bought a replacement part and put it on in the place of the OEM equipment. It’s also called “aftermarket”. Again ignoring the tortured grammar (would a space or hyphen kill ya!), it just means that you buy it and have it put on or put it on yourself. Where you buy it from doesn’t matter. Shimano makes the part but they don’t sell it direct to the consumer. Any item you buy from a shop is “after market”.
HelMart bikes (aka Big Box Store) bikes have even lower quality Tourney rear derailers than what you can buy in the after market. After market Tourney is almost okay but it is still a rather flexible derailer. A stiffer derailer (Alivio and above) is more precise and easier to tune.
Yes...kinda...that is what we are saying (in a less shouty manner). But here’s the kinda bit. As long as the derailer is for a 9 speed (or less), it will work. 10 speed and higher use a different pull ratio and won’t work with your shifters. It doesn’t matter that the derailer is a “mountain bike” derailer, it will work. The derailer is basically a robot and does what the shifter tells it to do. As long as the pull ratio is right, the derailer doesn’t care how many speeds the bike has.
HelMart bikes (aka Big Box Store) bikes have even lower quality Tourney rear derailers than what you can buy in the after market. After market Tourney is almost okay but it is still a rather flexible derailer. A stiffer derailer (Alivio and above) is more precise and easier to tune.
Yes...kinda...that is what we are saying (in a less shouty manner). But here’s the kinda bit. As long as the derailer is for a 9 speed (or less), it will work. 10 speed and higher use a different pull ratio and won’t work with your shifters. It doesn’t matter that the derailer is a “mountain bike” derailer, it will work. The derailer is basically a robot and does what the shifter tells it to do. As long as the pull ratio is right, the derailer doesn’t care how many speeds the bike has.
first sorry for missed grammar, it is not my native language and to be honnest i feel anxiety when i ask for help in a field i dont know so it is possible i m so anxious my typing is less than perfect. that is the way i am today trying to better ...
i never heard avout he pull ratio but i trust you. then how to select the manettes lever control ?
and i dont want to anoy you but would a 6-7 derailleur be better than a 9 speed for example?
tx for teaching me the basics
Last edited by first trip; 03-20-21 at 11:28 PM.
#20
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tx
since i want to learn and i m broke ill go in a do it yourself shop and order by myself.
#21
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english is my second language . is a shifter the thing you move with your finger to change difficulté speed? or other part?
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Here is good info you can absorb at your leisure. Best to have a basic understanding of these things before you start your project. https://www.sheldonbrown.com/bicycleGears.html
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hi,
first sorry for missed grammar, it is not my native language and to be honnest i feel anxiety when i ask for help in a field i dont know so it is possible i m so anxious my typing is less than perfect. that is the way i am today trying to better ...
i never heard avout he pull ratio but i trust you. then how to select the manettes lever control ?
first sorry for missed grammar, it is not my native language and to be honnest i feel anxiety when i ask for help in a field i dont know so it is possible i m so anxious my typing is less than perfect. that is the way i am today trying to better ...
i never heard avout he pull ratio but i trust you. then how to select the manettes lever control ?
and i dont want to anoy you but would a 6-7 derailleur be better than a 9 speed for example?
tx for teaching me the basics
tx for teaching me the basics
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Plan Epsilon Around Lake Michigan in the era of Covid
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Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
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Until you get some experience, you'll be much better off if you just match all the components of your drive train. Use the same model and series front and back DR and shifters. Pick cassettes and chain wheels that Shimano shows as compatible with that specific model line..
Don't mix up even the same model with a much earlier series of that same model, because many times it will have some incompatibilities. DuraAce today won't work with DuraAce of 10 years ago.
Shimano has compatibility charts and other tables to help you figure this out. https://si.shimano.com/#/
Don't mix up even the same model with a much earlier series of that same model, because many times it will have some incompatibilities. DuraAce today won't work with DuraAce of 10 years ago.
Shimano has compatibility charts and other tables to help you figure this out. https://si.shimano.com/#/
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Now I understand. To be honest, the first step would have been to “first” research hub motor over locknut width required and the rear dropout spacing on your bike.
I only spent a few minutes Googling it, but if your hub motor requires 135mm or more and your aluminum frame spacing is 130mm, or worse at 126mm, it will not fit.
I would ask in the Electric Bikes subforum if it will work. And you need details as to the bike you have and the hub motor you want to use.
You will not save 1cm between a 6 and 7 speed freewheel. You “might” be able to use a 5 speed freewheel with friction shifters and re-space the hub motor to fit narrower dropouts. I just don’t know. But it is way beyond just buying a few parts and hoping for the best.
Good luck.
John
I only spent a few minutes Googling it, but if your hub motor requires 135mm or more and your aluminum frame spacing is 130mm, or worse at 126mm, it will not fit.
I would ask in the Electric Bikes subforum if it will work. And you need details as to the bike you have and the hub motor you want to use.
You will not save 1cm between a 6 and 7 speed freewheel. You “might” be able to use a 5 speed freewheel with friction shifters and re-space the hub motor to fit narrower dropouts. I just don’t know. But it is way beyond just buying a few parts and hoping for the best.
Good luck.
John