thud sound from rear

[savister]

just changed to df210 springs at 35k miles on lb. when i'm going over some bigger bumps, there's a "thud" from the rear. Smaller bumps seems fine. is this normal because of the lowering? or just my shocks? or something else? not sure, first time lowering a car. wondering if i messed anything up.
thanks for any insights.

[WeeYari]

DFs are quite a low drop, and relatively soft spring. If you didn't cut them, you're probably hitting the bumpstops.

http://www.yarisworld.com/forums/showthread.php?t=9831