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.
BMW used to mix radial and bias on their F650 as well. Common and no biggie.