Will an ACS 13T X 3/32 Crossfire freewheel fit an All-City Standard 130mm fixed/free Hub? I am attempting to setup a goldsprints setup using a very large front ring and a small rear freewheel. I'm not sure whether a freewheel this small will thread on to these hubs.

  • 1
    Not a direct answer to your question, but instead of using a freewheel hub, you could use a cassette hub and simply run the chain around a single 11t sprocket. You'd have to adjust for chainline in the front.
    – lantius
    Commented Jan 16, 2012 at 0:12
  • I found the following on acsbmx.com: All ACS freewheels feature chromoly sprockets with 4 pawls (2 pairs engaging alternately), for quick engagement. ACS 16T - 22T freewheels thread on Standard English hub threads, and remove with the ACS universal removal tool. "All ACS 14T and 15T freewheels thread onto smaller, metric 'BMX Flip-Flop' threads, and are removed with the ACS 14T removal tool. You may need to remove your hub axle for the tool to have clearance. ACS hubs have a slide-off shoulder to give the tool necessary clearance.
    – Benzo
    Commented Jan 16, 2012 at 20:49
  • So it looks like the smallest I can use is 16T.
    – Benzo
    Commented Jan 16, 2012 at 20:51

2 Answers 2


No. Freewheels that small use a smaller diameter thread intended for BMX hubs. The smallest freewheel you're going to find for that hub is a 15T. I believe ACS makes one in 15T called Claws that fits a standard hub. Cheap and it works.


No, only 16T through 22T ACS freewheels use english threading found on the all city hubs.


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