Slightly O.T. - gearing for a SS road bike- Mtbr.com
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  1. #1
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    Slightly O.T. - gearing for a SS road bike

    Don't crucify me for asking a Roadie question here!

    I want to set up one of my road bikes (700C tires) as a single speed for commuting.

    Any suggestions for gearing? The terrain is not too hilly.

    Thanks

  2. #2
    i ride bikez!!11!
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    If it's fairly flat like you say, you might try 44-16 or 44-17.

    My fixie roadie is geared 52-18 or 52-20 depending which side of the hub I have.

  3. #3
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    if its hilly, I like 40-16

  4. #4
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    Thanks!
    Now I have a place to start to build my SS commuter bike.

  5. #5
    Retro Grouch
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    Using handy chainrings..

    A 42T chainring is pretty normal. I good starter gear is 42:18. As you find yourself spinning out you can up it to 42:16, which is a more versatile gear.

    1G1G, Brad
    Last edited by aka brad; 03-16-2007 at 01:11 PM.
    Just one more rep and I get the toaster!

  6. #6
    wot no bike?
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    Quote Originally Posted by dankilling
    if its hilly, I like 40-16
    +1 -- this is what I'm running on my 700c CX/commuter/fireroad blazer and it's good considering hills (and CX tires). I reach a comfortable cadence at like 17-18MPH flat pavement.
    pete

  7. #7
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    My road fixie is a 42/16.

  8. #8
    Appalachian Singletrack'n
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    Another here with 42/16 on the road fixy. i ride moderate hilly terain on that gear. If I were to go SS on the road (though i never would) I'd probably add a couple of teeth in the rear.

  9. #9
    Keep on Rockin...
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    42t upfront...

    Quote Originally Posted by aka brad
    A 42T chainring is pretty normal. I good starter gear is 42:18. As you find yourself spinning out you can up it to 42:16, which is a more versatile gear.

    1G1G, Brad
    I have a CX SS that I use primarily for hilly dirt-logging road riding. 42t up front 'cause I had a few old spares lying around. 18 out back 'cause that's what I had lying around (also have a 20t that I use when I'm out of shape).

  10. #10
    Single speed
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    Good job! 42x16 n still hangin' wit the geared roadies

    Hey,
    I just built an old mielle wit 42x16. Some decent hills (up n down the niagara escarptment)
    I can still stay in line with the pack of good roadies. Even keep pace on the front for a bit.
    I have a blast spinning my a$$ off down the high speed hills.
    I figure it is a great tool to put some base miles on at a steady heart rate for a constant duration. Also I feel I am conserving the trails when they are unridable.

    The question I have is: Now that I am working the 42x16 road fairly good, Can I push a bigger chain ring on the mountain bike on the trails?
    I guess I'll wait n see how my 32x17 ss mtb feels when the trails open up.

    Good luck in your ss road build.
    I know you will have fun when it's ready to roll.

  11. #11
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    I use.....

    48X20 on My SS 'cross bike on the road. This give cruises along nicely at 17-19 mph.

  12. #12
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    39/16

    Quote Originally Posted by 3sigma
    Don't crucify me for asking a Roadie question here!

    I want to set up one of my road bikes (700C tires) as a single speed for commuting.

    Any suggestions for gearing? The terrain is not too hilly.

    Thanks
    I run a 39/16 on the road on the cross check, with 35c ritchey somewhat worn out cross tires. I race cross with 39/18 either FW or fixed. Right now I have a 39/17t Fw on one side-didn't have a 16t laying around/ and a 39/18 fixed side cause I havn't changed out to my road gear yet, but I'm thinking about getting a 15t cog for the road, for higher speed on the down hills and flats. I run about 18-22 mph on the road with a 16or 17t cog or FW. I top out down hills at about 30-32 with the 16t cog. I like to spin a bit though.

  13. #13
    OOOOOOOh Gee Are Eee
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    42x16-18

    Have a SS 29er that I use to commute to work in. A sweet spot for me is around 2.6:1 (I've run both 34x13 and 42x16. It's a little on the high side so unless you are cruising around 20MPH your cadence is pretty low. Of course the only hills I have are freeway overpasses.

  14. #14
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    I like 46x17 - it's been working for me quite well in hilly foothills.

  15. #15
    J_S
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    gear chart

    Take a look at a gear chart, like the one at Sheldon Brown's site. http://www.sheldonbrown.com/gears/

    You can plug in your tire size, crank length, and cog/chainwheel combinations to get a number that works with the parts you already have.

    Using the calculator, most everyone's gear combos above yield something around 70 "gear inches", which is about where I am with a 48x19 and fat tires.

  16. #16
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    Good job! 48:18

    Quote Originally Posted by 3sigma
    I want to set up one of my road bikes (700C tires) as a single speed for commuting.

    Any suggestions for gearing? The terrain is not too hilly.

    Thanks
    I use 48:18 on my Il Pompino and I like it.

  17. #17
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    I've got 45/16 on my ss w/172.5 mm cranks. I live outside philly, very hilly, not mountains by any means, but I like the continuous change of grade. I actually really like the gearing. Might go up to 46/16 when in better shape this summer.

    This is a little OT, but I just bought a white ind. freewheel, and is it just me but the 16 T seems a little easier than other cheapo 16T that I have been riding since I made it into ss? Is it a little larger in Diameter?

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