While other manufacturers Jeans (Esprit, Diesel etc.) after 6-12 months stress show me wear (I drive daily bike), is the 501 after this period still in very good condition. The problem is usually the seam / the substance in the area of the step, this is the first after - not so with the 501. The denim is very durable quality.
Caution on size choice!
I wear else in almost all other manufacturers the size 32/32, with 501 in "submarine blue" I had to change 33/30, the pants waistband still quite tightly seated, the leg length is exactly correct.
So you unless its size in the 501 does not know exactly, rather try to place an order or selection in the shop, which saves a the back and forth.