Hi Geoff my tyres are 8.00 x 6, my top bearing of the nose wheel is bolted up underneath, I need to weld a stop ring on my nose leg which I'll do shortly. Let me know if you find rubber boots that will fit, I might put them on my plane. Will drill a hole in the channel for the bungy cord, an inch lower than the one that was already there, hopefully that will put enough tension on the bungy cord. Cheers Phil.