Front Wheel's and Slim Tyres on B4.1

[knighthawk]

Hi,

Can you answer a question!

Only just started back to 2wd off road after 20 year break!

Looking to enter an indoor off road series this winter and want to fit Shumacher Slim Mini Pins in Yellow and or Shumacher Slim Stagger Ribs in Yellow compound to the front of my B4.1

Now i've heard that you have to cut the out rib off the wheel rim as the tyre is too small, is this correct or am i being told porky's

thanks for any info!
D.