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Just a question.. I used to ride 99-2004ish.. wasn’t the best but I did have a blast.. I’m now 33 and taking the time and money to build up the bike I’ve always wanted. Things have changed tho.. are 44-45T sprockets extinct? Just trying to get educated on the things that have changed over the years. Thanks
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28/9
The only gearing you need
40-45t you can still find. But limited companies make them. But bmx racers still use them
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This threw me a bit when I upgraded too, but most drivers are 9 tooth now instead of the old 16 tooth so the ratios are different. There's also more crank sizes and tire diameters if you get into gear-inches, but the gear ratios should be enough.
45:16 = 2.8 to 1
25:9 = 2.7 to 1
28:9 = 3.1 to 1
30:9 = 3.3 to 1
So 25:9 would be closest to the old 45 tooth, and comes on most completes. I settled at 28:9 on a bike that's half the weight and a few inches shorter than my mid school tank. Took some getting used to, but it feels great spinning out of a trick and cranking up to speed.
Remember when you could ride all day and not be sore for a week?
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Joined: 5/20/2020
Location: Berea, OH USA
MJbmx wrote:
This threw me a bit when I upgraded too, but most drivers are 9 tooth now instead of the old 16 tooth so the ratios are different. There's also more crank sizes and tire diameters if you get into gear-inches, but the gear ratios should be enough.
45:16 = 2.8 to 1
25:9 = 2.7 to 1
28:9 = 3.1 to 1
30:9 = 3.3 to 1
So 25:9 would be closest to the old 45 tooth, and comes on most completes. I settled at 28:9 on a bike that's half the weight and a few inches shorter than my mid school tank. Took some getting used to, but it feels great spinning out of a trick and cranking up to speed.
Appreciate the info brother! I used to ride the DK SOB frame so I know exactly what you mean about the mid school tanks!
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Just be sure to match the sprocket with the correct diameter to match your spindle. Most sprockets, however, have washer adapters that downsize to fit a variety of spindle sizes.
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