Similar problem....... reverse solution
My C15a with the 10:50 x 16 chevron tires gave me a shimmy at around 40 + mph....
I inquired about balancing the tires at a Farm tire shop.... no can do on these rims.......BUT they suggested playing with the tire pressure and moving the tires around the four corners.
Moved the front to rear and decreased the pressure from 50 pounds to 30/32 pounds by five pounds increments..... at the lower pressure the shimmy went away...... and the ride got smoother....... not sure how accurate the speedo head is but will flat out at 45 mph screaming like a banshee........ much more pleasant at 35 mph.
Bob C
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Bob Carriere....B.T.B
C15a Cab 11
Hammond, Ontario
Canada
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