The skyways you have are Alloy hubbed that came with the super tuff's (hence the name and the spoked one was just called a super burner)
the hubs run on a axle - this has bearing in side keep in line buy cone nuts and on the out side of these is a slim nut that locks against the cone nut to keep it in place
these nuts are tightened to a certain point - not too loose that the hub rattles on the axle and not too tight that it doesn't spin - there is a fine line of getting it right - you have to try and get no rattle but a smooth spin but not rubbing or stopping it from spinning
you may need a couple of tools from halfords - one is a pair of slim wrenches - this is so that you can get one wrench onto the cone nut (which has a round side but two cut sides to fit on to, to do up or loosen)
some wrenches will not fit in the inside - but if you can find a old bike tool that came with most bought bike back in the day, it should work
they may be tight on there as it may not have been changed/undone for years
you will need to undo the other slim nut from the cone nut (can be hard) but keep going
then you will need to undo the cone nut - at this point you have to be careful as some of the loose bearing may fall out - if you do this over a old cloth as they can be caught as they may be greasy
count the bearing out as the same number need to go back in
leave one nut set in place on one side as this is a guide when lining back up
clean out all the old gunk and grease - small bit of new grease back in and place the loose bearings in one side and slide the now clean axle with the cone nut and slim nut one side - a bit more grease before pushing up the cone nut to the bearings
now you have to turn over the mag and do the other side - small bit of grease and then the bearings in - the grease will help lock them in place better - then more grease once all are in - cone nut up to the bearings
now you need to gently do up the cone nut till it touches the bearing on both sides - spin the wheel to see if there is any play or too tight
one you feel that it is right then the slim nut goes on to the cone nut - now you have to finely adjust it - tighten the slim nut to the cone nut which you hold in place as not to move - if at the end it has over tightened it all you can undo the slim nut - slacken of the cone nut and start again - this can be a bit fiddly but you can work on it
a well greased wheel with no dirt or gunk will spin very sweetly and make the ride so much better
hope this has helped
failing all that just take it to you local bike shop and pay them to do it
cheers B