Choice is limited in 630 size.
Schwalbe tend to be very heavy, the only solution IMO, is continental (Gatorskins & Ultra Sports).
I think Gatorskins are expensive for what they are, Ultra Sports are cheaper and not as dreadful as some would have you believe.
If you are looking for some real quality try these on evilbay
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270578152409&ssPageName=STRK:MEWAX:IT
@ph1 started
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Choice is limited in 630 size.
Schwalbe tend to be very heavy, the only solution IMO, is continental (Gatorskins & Ultra Sports).
I think Gatorskins are expensive for what they are, Ultra Sports are cheaper and not as dreadful as some would have you believe.
If you are looking for some real quality try these on evilbay
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270578152409&ssPageName=STRK:MEWAX:IT