Need help with tyre size for commuting!

Hi,
I have a Giant XTC and its got off road tryres at the mo and its really hard cycling 6 miles to work up hill most of the way.
I want some semi's that will make it easier but I am skint right now.
I have looked at the size on there now and they are 26'' x 2.10''.
I was looking at Schwalbe Land Cruiser 26" x 1.9/2'' but will these fit if my existing ones are 2.1''??
Also any suggestions for alternative would be great!
Thanks,
Al
I have a Giant XTC and its got off road tryres at the mo and its really hard cycling 6 miles to work up hill most of the way.
I want some semi's that will make it easier but I am skint right now.
I have looked at the size on there now and they are 26'' x 2.10''.
I was looking at Schwalbe Land Cruiser 26" x 1.9/2'' but will these fit if my existing ones are 2.1''??
Also any suggestions for alternative would be great!
Thanks,
Al
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Posts
I recently went from 2.1" to 1.3" slicks (Conti Sport Contacts) and its added roughly 5mph to my commute (on the fast bits). Just don't ride on wet grass!!!!
Al
I had to get new tubes but thats coz there was such a massive difference in size. You are only dropping about .2" so should be able to use the same tubes you currently use.