Rear Derailleur
pub-8348084515547660
Can I fit a Shimano Deore 9 speed rear derailleur on a bike originally equipped with a Shimano Altus 7 speed?
I have a Schwinn mountain bike originally equipped with Shimano Tourney/Altus parts. The rear derailleur is a 7 speed Shimano Altus, and I would like to make a cheap upgrade for some trail riding (recently got into it and the rear shifter is slow, even when tuned) by changing this out for a better Shimano Deore rear deraillleur. I know that 8 and 9 speed derailleurs are compatible with 7 speed cassettes, but will the Deore derailleur fit properly and work as intended in my case? Do I need any special tools besides a chain tool and some wrentches/allen keys/screwdrivers?
Alright... first off, you can change it. Second, you will only need to change your chain if you change your cassette. All you need to do is adjust the limit screws on the derailler to fit the 7 speed cassette.
The gear spacing is different between 7 and 9 speed, but this is controlled by the shifter, not the derailler. If all you are changing is the derailler, it is no problem.
If you don't want to break the chain, you can install a rr derailler by removing the lower pulley, loosening the upper pulley, and re-installing the lower pulley on the chain after routing it through the derailler. It is really easy and quick this way.
Lastly, if you do choose to make the drivetrain 9 speed, you'll need to replace the rr wheel, chain, and shifter.
Good luck
2 - Adjusting a Rear Derailleur
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2010 JAMIS XENITH SL DI2 ROAD BIKE 56CM US $8,000.00
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2012 Specialized S Works Venge DA 56cm Project Black US $7,999.00
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Vintage RT Jansen Steel touring road bicycle 54cm bike Huret Duopar Mafac US $7,999.00
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2011 Trek Remedy 99 All Mountain Bike Large 195 US $5,800.00 |
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Specialized S Works Epic FSR 29er Size L 19 US $5,500.00
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2011 Trek Speed Concept 99 US $5,500.00
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New 2010 Pinarello FP7 Carbon Red white Complete Bike US $5,499.95
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NEW 2012 CANNONDALE FLASH 29ER 1 CARBON BICYCLE SRAM XO CUSTOM LEFTY STANS ZTR US $5,499.00
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Blue Competition Cycles Ac1sl Sram Red Zipp 404 Frame Size SM US $5,199.00
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2010 JAMIS XENITH SL DI2 ROAD BIKE 56CM US $8,000.00
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2012 Specialized S Works Venge DA 56cm Project Black US $7,999.00
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Vintage RT Jansen Steel touring road bicycle 54cm bike Huret Duopar Mafac US $7,999.00
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2011 Trek Remedy 99 All Mountain Bike Large 195 US $5,800.00 |
Moots Mooto XZ 19 Frame US $5,700.00
|
Specialized S Works Epic FSR 29er Size L 19 US $5,500.00
|
|
2011 Trek Speed Concept 99 US $5,500.00
|
New 2010 Pinarello FP7 Carbon Red white Complete Bike US $5,499.95
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NEW 2012 CANNONDALE FLASH 29ER 1 CARBON BICYCLE SRAM XO CUSTOM LEFTY STANS ZTR US $5,499.00
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|
Pinarello Montello Time Trial Bike 55cm US $5,399.00
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Cannondale Scalpel Carbon 2 full suspension mountain bike large new US $5,300.00
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2009 jamis xenith T2 TRI ROAD BIKE SIZE SMALL US $5,200.00
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2009 jamis xenith T2 TRI ROAD BIKE SIZE MEDIUM US $5,200.00
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2009 JAMIS XENITH TEAM ROAD BIKE 54CM US $5,200.00
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Specialized Tarmac SL3 Project Black 58cm Carbon Road Bike SRAM Ksyrium SL 2011 US $5,099.99
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2011 Specialized S Works Tarmac SL3 SRAM Red Used US $5,000.00
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