[AzCal Retred]

Classic500 was asking about the current issue Duro's - " Duro HF 307 3.25 19 on the front and a Duro HF 307 4.00 18 on the rear. "
I believe the older Duro tyres were a bit wider than the current crop judging from previous posts. At present even the HF307 Trials Universal 4.00 x 19 clears the sliders, as I posted a picture of previously. The OD is about the same as a 3.00x21, a useful feature for trail. The greater width is an asset on the front as well, reducing loading per square inch. Probably not the best for slop mud conditions, but that's a horsepower game anyway.