A few people have been scammed on the site, Only use paypal to pay for items for sale by other members. If they will not use paypal, its likely a scam NEVER SEND E-TRANSFERS OF ANY KIND.
Go to cyclepartsnation
Look up NC700
Go to front wheel
Check bearing ( std number is given in brkts)
Search the web for that number + bearing dimensions
First number is nominal I.D.
Second number OD
Third Thickness
You now have learned to fish