Z ZHICHI 2-in-1 Leg Curl and Extension Machine (TT02)

The Z ZHICHI 2-in-1 Leg Curl/Extension Machine, model TT02, is third in our guide to leg extension machines for home use. It is a single station that switches between lying leg curl and leg extension, priced at £300.43 and rated 4.4 out of 5 from 181 ratings. The listing describes a 50 x 50 mm carbon steel main frame pipe with 1.4 mm wall thickness, six foam pads and two cushions, 3 backrest pad positions, 2 seat cushion degrees, a 5-second function switch and a quoted 7.9 sqft of space use.

The number to look at here is the 660LBS. It appears as the machine's weight capacity and again in the spec table as a Maximum Weight Recommendation of 660 Pounds, with Tension Supported listed as 300 kg — about 661 lb, so those two figures agree with each other. Where the listing stops agreeing with itself is the plate advice: a separate bullet says weight plates should be less than 130LBS. The 660LBS is what the frame is rated to hold; the 130LBS is what the listing tells you to load on the arm. The same page also quotes the machine's own weight twice, as 21KG net in one bullet and 20 kg in the spec table. Everything on this page comes from the Amazon listing, not from any testing we carried out.