My Dryer's manufacturer (Kenmore) lists that belt as P/N 661570.
I needed to replace the old one (since it was cracked) so I purchased a new one on eBay. It came sealed in a bag manufactured by FSP. It has the exact same number (661570) but... unlike the older (cracked) one, it has only 4 ribs and measures only 1/4" wide.
The older one has 5 ribs and measures 5/16" wide.
Is this going to affect the machine in any way? Is it going to exert unnecessary load on the motor, for example?
Thanks, Sam