Bicycle TutorBicycle Tutor

Show off your bike!

Related video tutorials:
7 speed cassette change out
#1
I have a 1989 Panasonic steel frame road bike, 7 speed. Is it possible to replace the cassette with a 9 speed on my existing wheel? Or do I need to replace the wheel in order to get the 9 speed cassette, and is this even possible on this old of frame? If this is possible, I would eventually like to update as many components as compatible. I am getting weary of downtube shifting.
Reply
#2
I'm not 100% but I am pretty sure something fomr the 80's would be a freewheel. I'm not sure if they make a 9 speed version of that, you would need a freehub body on the wheel.
This will explain the differences = http://www.sheldonbrown.com/free-k7.html
Reply
#3
7 speed is likely to be cassette. But you can't put 9+ on a 7 speed wheel without modifications anyway. Most likely just need to swap the freehub and add 4mm of spacers to the axle.
See: http://www.sheldonbrown.com/speeds.html & http://www.sheldonbrown.com/k7.html
You'll need to spread the frame a few mm as well, but that's no big deal. I think derailleurs will be OK, but not sure.

I think you can also still get 7 speed integrated shift/brake levers for lower end shimano (Sora?). Then you wouldn't need to change anything in the drivetrain.
Reply
#4
If the free hub is 8/9 speed compatible you will find a spacer behind the cassette when you take it off. 8 and 9 speed cassettes are the same size 9 speed uses a narrow chain to create the space for the extra gear. I have converted a Mountain bike from 7 to 8 but my free hub was compatible and all I had to do is change the shifters and cassette to 8 speeds. If I wanted to convert to 9 speed I would have had to change much of the group set to handle the narrow gauge chain.

The reason I wanted to change was to provide a granny gear and closer ratios in the middle gears. If you hunt around e-bay for the bits you will most likely need new rear wheel or hub, cassette, rear mech, front mech and chain and chainset leavers and cables for a 9 speed to work properly. An 8 speed conversion may be possible without too much work but I doubt a 1989 rear wheel will have a compatible hub. Might pay to stick to 7 speed and finding a cassette with ratios that suit your riding.
Reply
#5
I appreciate the replies and have already accessed some of the resources mentioned. I'll give it a try and see what I can do. May be back for more advice Smile
Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  How To change a Suntour Cassette to a Shimano DieselLegs 6 7,053 10-06-2014, 04:30 PM
Last Post: DieselLegs
  6 Speed Cassette Question RunningBehind 2 4,263 04-15-2014, 03:38 PM
Last Post: RunningBehind
  Will a 10-speed cassette fit on my....? RiceBurner 3 8,850 12-28-2013, 05:51 AM
Last Post: RiceBurner
  Assembling custom 8 speed cassette WinterRider 6 5,945 11-19-2013, 05:09 PM
Last Post: WinterRider
  Change chain = change everything ? mfisher0 3 3,690 05-23-2013, 05:45 PM
Last Post: DaveM
  Single Speed Vintage CCM sprocket change kirbsfrom 2 3,639 05-21-2013, 04:17 PM
Last Post: DaveM
  Converting cassette to 3 speed hub ? jameson2wheels 10 11,931 06-17-2012, 03:14 PM
Last Post: silverarrow
  Shimano 10 speed cassette andymeek 3 7,362 06-13-2010, 07:11 PM
Last Post: cyclerUK
  Cassette change Driftus 3 5,900 05-03-2010, 03:42 PM
Last Post: Driftus

Forum Jump:



ISSN 1918-3445 © Copyright 2007-2010 Bicycle Tutor / Privacy Policy / Created by Alex Ramon

feed