JTLondon wrote:I hear spaces are quite dangerous to have... whats worse using spaces or putting on the wheels without them?

Right I'll try to sort out the popular myths
Spacers are sometimes the only way to get the wheels you want to fit the car you have properly - ie simplistic example here (all widths and rim sizes staying the same - if they only make the wheel you want in ET 59 and your car is ET38 then to make em fit you are gonna need 21mm spacers.
Spacers are fine provided
1. If 5mm - 10mm
- Longer wheel bolts (add the spacer length to your original bolts and order accordingly and you'll be fairly close -
you need 7 turns of the wheel bolt min and 9 turns max)
- the Hub centre still protrudes far enough for the wheel centre to sit on it and keep it running true
2. if bigger than 10mm
- longer wheel bolts are starting to get iffy - can be done but best solution is a spacer which bolts to the hub and has new threaded holes to bolt the wheel too
- They need to mirror the Hub ie have a locating boss for the wheel that is the same dimension as the hub
So what is dangerous
- fitting spacers on hubs and then using the original wheel bolts
Your wheels can come off !!!
- fitting spacers that overlap the hub centre boss with no substitute hub boss
You could get cronic wheel wobble or balance problems
Like most things ask first - measure twice - cut once