Hi, I picked up a 2008 YBR last week to get practice on before doing DAS, seems to be a great wee bike but one thing I want to change are the tyres. I had thought it would be fairly simple but Black Circles doesn't have any that matches the sizes on the bike.. The sizes on the bike are front = 2.75 -18 (unknown brand) and the rear = 3.00 -18 (Avon AV83) http://img4.imagetitan.com/img4/small/22/22_img-20200816-wa0002.jpg http://img4.imagetitan.com/img4/small/22/22_20200823_091146.jpg http://img4.imagetitan.com/img4/small/22/22_20200823_091211.jpg http://img4.imagetitan.com/img4/small/22/22_20200823_091222.jpg http://img4.imagetitan.com/img4/small/22/22_20200823_091231.jpg Any help would be great so I can get a rough price Thanks