Calling all 15 tooth owners.
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Thread: Calling all 15 tooth owners.

  1. #1
    Senior Member TW_in_BC's Avatar
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    Calling all 15 tooth owners.

    The last bike I rode before buying this TW, was my DR650...so it's understandable that I'm always running out of gears when travelling slab, to and from work.

    I've ordered and received a 15 tooth front, but I remember years ago when I put a 42 tooth on the rear...it was great for asphalt, lousy on trails...especially when I rode 2-up.
    So before I go through all the effort of installing the 15T...I thought I'd get some opinions from other 15T users, either for or against.

    I'm in the "over 200 lb" class, but I still want to be able to climb the hills....am I going to lose too much torque by going with the 15?
    How much more top-end did you get from this mod...do you think it is worth doing, if not...why not?
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  2. #2
    Super Moderator littletommy's Avatar
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    These might help:

    https://sprocketcalculator.com/

    https://www.gearingcommander.com/

    One tooth difference on the front sprocket equals three on the back more or less. So it would be comparable to a 47 tooth rear sprocket. There's a big difference in 47 and the 42 you previously tried. My personal experience was I wished I had put on a 15 tooth sooner.
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  3. #3
    Senior Member GaryL's Avatar
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    Unless the front sprocket is already worn and in need of replacement I would just put a 47 on the rear, same difference actually and a much easier change. You won't lose much on the bottom end or gain much on the top either way you go but the 47 rear seems to be what most road riders like. Going with the 15 front and 47 rear IMO would be disastrous for any deep off road riding.

    GaryL
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  5. #4
    Senior Member Xracer's Avatar
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    I put a 15 on several years ago. It lets me keep the revs down a little when road riding but does not make that much of a difference on the bottom end. Glad I did it.
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  6. #5
    Senior Member jeepster09's Avatar
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    I have 15 front and went 55 rear, a little lower than stock works good for me.
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  7. #6
    Senior Member old w/??'s Avatar
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    You are not going to gain more top speed (if that is why you are looking for 6th gear). You will have slightly less vibration (if that is why you are looking for 6th gear). If you have hills on your drive, you may have to shift to 4th sooner; but that might work out better on those hills.
    littletommy likes this.

  8. #7
    Senior Member jeepster09's Avatar
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    Quote Originally Posted by jeepster09 View Post
    I have 15 front and went 55 rear, a little lower than stock works good for me.
    I went with 15/55 only to save chain life and sprocket life. LESS WEAR and as bonus got a little lower gearing for off road.
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  9. #8
    Junior Member Mikedprince's Avatar
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    I was seriously considering a change to a 15 front/47 rear. I primarily ride on the street around town with a little dirt road running. The comments are causing me to rethink this idea. Thank you! Are there likely to be post on this forum somewhere about rider's impressions of different sprocket combinations?
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  10. #9
    Senior Member YamTW87's Avatar
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    Quote Originally Posted by Mikedprince View Post
    I was seriously considering a change to a 15 front/47 rear. I primarily ride on the street around town with a little dirt road running. The comments are causing me to rethink this idea. Thank you! Are there likely to be post on this forum somewhere about rider's impressions of different sprocket combinations?
    Read this thread for road gearing.
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  11. #10
    Senior Member SHAG's Avatar
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    I've had a 15 T front hanging on a peg in the garage for over 5 years. I have put off changing it because I still get into situations where I cant afford less power in 1st gear. I should lose 20lbs and just change it! I'll report back when that happens
    Go like hell, You'll get there quicker!

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