How can you skid / How to do skids / skidding

you gearing is way too high. try 48x 19 - it makes all the difference in the world.

You are at around 90 gi (gear inches) at the moment, you'll destroy your knees and be unable to control your bike. If you went 53x20 (thus keeping your big ring), it would go down to around 70 which is what a lot of people ride.

Here play with this http://software.bareknucklebrigade.com/

Beyond all that don't get too caught up in the 'look' of your bike - you can still use a break on an unmachined rim, it just won't be as effective.

Good luck and be careful!

Thanks.