Sprockets

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5/22/2020 9:30 AM

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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5/22/2020 9:44 AM

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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5/22/2020 9:48 AM

Thanks brother!

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5/22/2020 10:18 AM

25 and 28t sprockets are the norm now. hard to find anything but.

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5/22/2020 10:50 AM

30/9 gearing is where the party is at

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5/22/2020 10:58 AM

jmz313 wrote:

25 and 28t sprockets are the norm now. hard to find anything but.

Yes I see. I used to ride a DK SOB within a DK IronCross 44T sprocket. Can’t find the frame in decent condition. I was trying to figure out what’s the new norm! Appreciate you brother!

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5/22/2020 11:00 AM

eskimojay wrote:

30/9 gearing is where the party is at

I do love to party

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5/22/2020 11:54 AM

40 pound bikes have moved over to make way for 20 pound bikes.

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5/22/2020 12:04 PM

eskimojay wrote:

30/9 gearing is where the party is at

F*** you
Photo

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5/22/2020 3:06 PM

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.

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Remember when you could ride all day and not be sore for a week?

5/22/2020 4:46 PM

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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5/22/2020 9:44 PM

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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