Main Motorcycle: BonnieNewchurch, Tiger800
Join Date: Oct 2014
'fraid I don't have anything to offer for question #1.
Q2. you are mixing up two different attributes.
Tyre construction can be bias ply, bias belted, or radial.
In the tyre spec on the sidewall this designated '-' bias ply, 'B' bias belted, 'R' radial. eg. 150/70R17 is radial.
Tyre can also be TT (tube type) or TL (tubeless). This is independent of construction.
So there's nothing wrong with a radial TT tyre. It gets more complicated when you want to fit a TL tyre to a rim that requires a tube. This is where you fit a tube into a TL (tubeless) tyre. I don't see anything wrong with that, but I have heard said that this arrangement results in the tyre running hotter and have seen advice to run this combination at a speed rating one lower than stated on the sidewall. You could also run a TT tyre (with tube obv.) on a rim made for TL, I wouldn't want to do that as you lose the advantage of running with tubeless tyre on a rim that could take a tubeless tyre.