This can be for any one who regulary goes to different tracks which require different size rear sprockets.
I have been doing this with my rear sprockets for more than 2 years now and have never had a problem with the holes stuffing up. Because I own an SQ blata replica the rear rim is different to any other rim and these are almost impossible to come by, but this idea can be used by all.
Firstly you need some loctite a strong holding one. 3 headless screws with an hex key hole in the top, 3 lock washers and 3 lock nuts. Poor some of the loctite onto each screw and screw them into each hole when you have a good depth covered and not too much screw sticking out just enough for the sprocket to fit over and the lock nut. Place your sprocket into position and put the 3 lock washers on and then screw each one up with there lock nuts ill tight. I have placed some photos for you guys to have a look at if anyone is not sure pm me.
saves you stripping out the crappy cast threads
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