• This topic has 9 replies, 7 voices, and was last updated 9 years ago by D0NK.
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  • Singlespeed ratios – easier gear than 48/18?
  • brooess
    Free Member

    I moved house recently which means my commute is a little bit hillier, and my 48/18 is a bit of a tall gear when I’m tired.

    My freewheel isn’t in the best condition so was thinking about replacing it with a better quality one and going for 19 teeth instead.

    Alternatively, is dropping to a smaller chainring a better idea? Maybe to 46?

    How much difference will going to a 19t freewheel make? I’m not after a massive change, just a little easier. I currently spin out c 23mph and don’t want to go too much lower and lose this top end speed

    clubber
    Free Member

    48/18 = 2.67
    48/19 = 2.52

    2.52 / 2.67 = 94.6% = eg it’ll be 5% easier

    You’ll also spin out 5% earlier eg at 23 x 94.6% = 21.7 mph

    nbt
    Full Member

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    cynic-al
    Free Member

    on most road cassettes there would be a 2-3T jump from an 18T, so about 1/3 or a gear – **** all really.

    TiRed
    Full Member

    A 19T freewheel will make little difference. 46:18 would be my choice to gear down. I bought a used langster which had 42:18 freewheel and it was far too low (it’s 42:16 now – the standard choice for rolling terrain).

    If you ride it fixed, it sometimes feels like a cog lower because the drivetrain is more efficiently coupled to your legs.

    Mister-P
    Free Member

    I don’t know what freewheel you are running but I do know Shimano ones only come in 16, 17 and 18T so I would have to swap the chainring instead.

    D0NK
    Full Member

    it’s 42:16 now – the standard choice for rolling refrained

    I’m running this on my CX, find it a bit spinny on road TBH.

    How long have you been doing the route? Can I suggest mtfu – see if you acclimatise?

    TiRed
    Full Member

    I’m running this on my CX, find it a bit spinny on road TBH.

    Fixed or free? You can spin much better when fixed, so it doesn’t feel that low. It’s geared for 80rpm at 16.5 mph. So a reasonable cadence/speed range of 80-120 or 16-24, with “excursions” to 30 downhill.

    tomaso
    Free Member

    42×16 on Langster for my flatland commute spins up to 25mph and can go beyond but it gets a bit much. Spin spin spin

    D0NK
    Full Member

    TiRed ignore me, I read 42×18 but quoted 42×16 which is a gnats chuff away from 48×18 anyway. 42×18 is on my CX and as you said too low on road.

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