Amazon.com : 7 Speed Threaded Freewheel with Fast 11 Tooth Small Gear (11-32 Range). Allows Comfortable Pedaling at High Speeds. Perfect for Ebikes. : Sports & Outdoors
SHIMANO TOURNEY MF-TZ500 MF-TZ31 7v 7 Speed Cassette Mountain Bike Freewheel Metal Thread Sprocket