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  1. #1
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    Need some help with a sprocket swap

    My wife is looking for a little more speed on her Trek Cruiser. Stock it comes with a 38t chainwheel and a 18t cog. What would be the best way to get a little more top speed? We cruise at around 15mph, but her feet look like she's going 120!

    http://www.trekbikes.com/us/en/bikes...ic/classicwmn/

  2. #2
    Senior Member cyclist2000's Avatar
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    you might be able to get a smaller rear cogto put on the hub.

    or replace the rear wheel with a 3 speed coaster brake wheel.
    Last edited by cyclist2000; 05-04-10 at 09:59 AM.
    I don't do vintage, I bought them new, rode them, kept them. Now they are just old bikes
    http://www.flickr.com/photos/bustercrb/sets/72157623483647522/

  3. #3
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    Yeah, I'm thinking a 3 speed hub might be the best bet.

  4. #4
    mechanically sound frankenmike's Avatar
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    I have a hunch that converting to a 3-speed coaster brake rear wheel would cost more than half what you paid for the bike. Personally, I would try a smaller cog first-should run under 20 dollars. If that is not satisfactory, perhaps a new bike is in order. (Yay!)

  5. #5
    Senior Member DieselDan's Avatar
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    You can only get a cog that is 2 teeth smaller, a 16T, but you can get a larger chainring, possibly up to 44T.
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

  6. #6
    Senior Member BlazingPedals's Avatar
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    You could get a crank with a bigger chainring, but it'd mean losing the chain guard. TANSTAAFL - tell the wife that her high cadence is why it's easy to pedal. If she wants more speed, get her another bike.

  7. #7
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    Even a drop to a 16T would make a lot of difference. I certainly have experienced that. It would get her out of the 50's and into the 60's gear inches. Cant give you exact gear inches as i dont know wheel size so i figured it out with both 26 and 700's. You might have to shorten up chain by a link or so but easy job to do. Changing the chain ring has to be by a lot more teeth to get same result and costs more.
    Ive always had at least one s/s bike in my collection,and its pretty common for most s/s people to ride it somewhere in the 60'S

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