Originally Posted by doxbike
So if I am reading it correctly, the OEM Battlewings on my 2011 xc, front 90/90-21 is bias ply; the Rear 150/70-17 is radial ply. The Heidenaus appear to be bias front and rear-can't find the specific designation on line or on the tire. If I should decide to try the full bores, should I go m-40 radial on the rear and m-41 on the front (only have 90/90-21 in bias).
I thought you weren't supposed to mix radial and bias, yet it appears that several Triumph models do.
It's a common misconception that you can't mix radial and cross ply. You can. BUT you can only do it by having the radial on the rear.