mounting bullseyes to rims

[team n.o.m.a.d]

having difficulty in mounting fastrax bullseyes to normal sc rims as tyres are moulded different to normaal sc tyres,ive cut the outer bead lip off wheel but now wheel diameter to small so there is a gap so tyre wont seat properly.is there another way which would be better. thanx

[Gies]

They only fit 100% on the fasttrax rims.
They are a bit wider so they will unglue after a few rides!