Quoted message said:Hi All,
I've a trip coming up and I want to change my bike's road gear set-up
to something more mountain. The bike itself is a 2004 model
Specialised SIrrus A1. The current model has a Shimano HG50 8-speed
12-25t rear cassette. At the moment I can't be sure my model uses the
same, but, assuming it does, what would one need to purchase to allow
for more appropriate gearing. I'd like to do this simply and cheaply.Many thanks.
Simon
Here's how:
http://www.parktool.com/repair/readhowto.asp?id=48
The tools needed are quite cheap and will last forever.
All Shimano cassettes since 1990 are removed in the same fashion. If
you change to a wider-range cassette, bear in mind that you may need a
rear derailleur with a longer cage and almost certainly need to add a
couple links to the chain.
Jeff