Singlespeed CX anyone do it? Good ratio

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  • Singlespeed CX anyone do it? Good ratio
  • Going to have a go at SSCX in the new year.

    Never done a cx race so wondering whats the best ratio to go with for a SSCX bike?

    36-16??

    Happy with a 32-19 on my 29er.

    Premier Icon tthew
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    I have, a couple of times on my DayOne. Unfortunately I’d say it really depends on the conditions if you want to be competitive. I just use the standard 36-18 which is fine in really fast conditions, (unlikely!) but is bloody hard work in the soft. 36-16 is the ratio I use for road riding, would be way too hard work.

    I run 32-18 on my 29er and happy with that, so I reckon, if it’s compatible crank wise a 32-16 combo may work well for you, (though I’ve not calculated what sort of gear inches that gives).

    Premier Icon tthew
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    32-16, 32mm tyre = 54.5 inch
    36-16, 32mm tyre = 60.8 inch
    32-19, 2.1inch tyre = 48.2 inch

    Premier Icon jameso
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    34 oval-16 but it’s a slog in the mud on climbs with no momentum. Never raced it.
    (34 oval-19 on my 29er for ref – ok on that for most stuff)

    Most of the stuff I found on th’web seemed to suggest 42:18 was the standard but that seems pretty high to me.

    I’ve run 39:17 and 42:21 at times, no science to those choice more what had lying around, issue I’ve found is the balance between not spinning out on the flat versus deep mud and hills.

    Premier Icon oxym0r0n
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    I was wondering the same thing the other day as considering it for spam winter challenge – day 1 too. Currently 42/16 for road but I imagine way too high for off (32/18 on my ss mtb but that is way too spinny for spam).
    Don’t really want to buy a new chainset and the smallest chainring I’ve found is 40t for 110bcd. Also have a nice white ind freewheel. Hmm…

    Premier Icon jameso
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    39-18 worked for me in the past on the same trails. So a 2.1-2.2 :1 ratio, roughly. CX racers will be fitter than me tho.

    umop3pisdn
    Member

    33×17, found anything higher too big for racing

    john_l
    Member

    I race & ride on 39/18 – it’s usually quicker to get off & run if you’re struggling to turn that over on short, sharp or claggy climbs.

    JoB
    Member

    38/18 so i can ride past john_l when he’s had to get off and run

    😉

    cynic-al
    Member

    Only done 1 cx race, used 26″ ss mtb, 2:1 on that was perfect, which would translate to 36:18.

    Keef
    Member

    i normally ride 42/18 fixed on my CX bike,I did the Gogoo Hellcross in belgium on 42/19 and it was too high.
    Very muddy tho.

    Kuco
    Member

    Never raced but rode my CX with 38×18.

Viewing 13 posts - 1 through 13 (of 13 total)

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