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Grants, tire technology has come a long ways since the 1980s. I watch the MSF instructor training videos that showed, with high speed film, the front tire always moving slightly, left to right, as the road surface changes just do to irregularity. That is done to maintain the straight line. We do the same things in cars also, just to maintain the lane position and nothing is really that straight.
I usually got 2 rears to one front. which for most of my riding life was 10K (usually) on the rear, so 20K on the front. Fronts were usually replaced at that interval because of the cupping, but not down to the wear bars. This was consistent across many motorcycle manufacturers. Suzuki, Kawasaki, Moto Guzzi and Harley. Some spoked rims. Mostly mags. I always ran the high mileage tires. Except on my 79 SP1000 Moto Guzzi which ran sporting Pirelli's for play time!
So I guess the common factor is me across all that!
I know many people who never wear out tires. Because they only ride on sunny days in the morning and are back in the AC by noon. These are the folks with the garage queens with 500-1000 miles a year.
Never had a tire cup, Id say you never put 10K on a front tire.
I didn't like this side-to-side front tire motion on the factory Dunlop 401 tire. It felt like squirming, to me. Changed to Dunlop AE, and much better with the curved grooves in it, rather than alternating straight bevel grooving of the 401's.
Maybe it's just me, idk. I do know I won't ever go back to the 401's.
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