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The Extrawheel Nuts enables you to use an Extrawheel trailer with bicycles that use nutted axles.
Be sure to determine the correct size for your bicycle's solid rear axle. The size of your rear axle can generally be determined by looking it up in reference to the manufacturer of the rear hub.
If you can not determine the size of the rear axle through the hub manufacturer's brochure or online information you can determine axle size by removing one of the nuts. Take the nut into a hardware store or local bike shop. Determine its size by checking which size axle (or bolt) it will thread onto.
Extrawheel Nuts Size Guide: (This list does not include all possible solid axles.)
3/8"(9.5mm) x 24tpi: Coaster brake, Skyway
3/8"(9.5mm) x 26tpi: Shimano Nexus, Taiwanese hubs incl. Sovos Flip-Flop hubs, most Suzue models, Old Deore XT
10mm x 1mm: Shimano, Sun Tour, Sansin, Surly, Suzue (loose ball) Atom, Maillard
M5: Fits bicycles with rear wheels that are not mounted using standard quick release or nuts. This includes some bikes with multi-speed hubs and other odd style hubs. The M5 nuts only fits to bikes with fender eyelets. A M5 screw is put through the fender eyelets facing out from the frame. The M5 nuts are then tightened onto the M5 threads.
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