Which cassette?

chichee
chichee Posts: 104
edited June 2012 in MTB buying advice
Contemplating this idea but wanted more opinion and knowledge on this.

I am fairly busy most of the time and when I do have time to go for a ride, I thoroughly enjoy it. However, the dilemma is changing the tyres over from mountain bike tyres for the weekend and road tyres for during the week. I don't want to waste riding time changing tyres over. So, having said that, Is it a good idea to look for some relatively cheap wheels, so I only have to physically change the wheel over each time, which takes less time.

I already have spare inner-tubes and tyres to put onto a new rim and this saves some money already. The only thing I don't have is a new cassette. I have looked on Chain Reaction at cassettes, and considering that my current bike uses uses SRAM and a PC850 chain, if I do go ahead with the idea of new rims, which cassette should I go for?

PG820 8 speed
PG830 8 speed
PG850 8 speed

Over to you guys!

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