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Which Rear Derailleur for '92 Kona Hahanna
#1
Hi all,

My rear derailleur or rear mech I think you call it has sheared completely off so need to buy a new one but not sure what type is required or how much it matters.

Bike is a 21 Speed Kona Hahanna entry level MTB from 1992 ish. I've attached a couple of pictures which might help. Any advice greatly appreciated,

[attachment=3176][attachment=3175]

cheers

Matt.
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#2
Matt,
It looks like your derailleur hanger has been bent pretty badly also. Before you invest any money in a new derailleur, you might want to try to straighten it without breaking it off by using the method shown here:

http://www.utahmountainbiking.com/fix/rhanger.htm

Be patient, use the longest bolt of the right size you can find, and bend it back into alignment in small increments. Good Luck!

Ride on, keep on riding
Riding on and on and on and on and on and on and on and on
Ride on, gonna have myself a good time - AC/DC

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#3
Cheers Dude,

Yeah I thought that as well, but wasn't sure if it was the design! Doh. Will give it a go then, I haven't got the money to waste at the moment!
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#4
Matt,
You can find some inexpensive rear derailleurs on ebay if the straightening works out. Just make sure you get one that matches the shifter activation ratio. i.e. usually shimano = 2:1, sram 1:1. By the look of the shifter in your picture it is a shimano type.

Ride on, keep on riding
Riding on and on and on and on and on and on and on and on
Ride on, gonna have myself a good time - AC/DC

  Reply
#5
Beautiful thanks,

There's a community bike project local to me that probably have the bolt for the straightening job.
I can't quite get my head round 2:1 is that the ratio between largest cog size to the smallest of the sprockets? Will see how I get on.

Cheers!
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#6
The 2:1 ratio refers to the amount of cable pull for the correct shimano indexed shifting (SIS). Your picture shows shimano shifters so you will need a shimano or shimano compatible derailleur.

Your community bike project might have a hanger alignment tool (somewhat expensive), which works better and easier than a bolt. If they do someone there should be able to show you how to use it.

Salute!

Ride on, keep on riding
Riding on and on and on and on and on and on and on and on
Ride on, gonna have myself a good time - AC/DC

  Reply


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