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Thread: New 2x10 set up

  1. #1
    Senior Member thehammerdog's Avatar
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    New 2x10 set up

    I was reading the new dirtrag and saw that almost every bike was a single up front times 10 in back?
    What memo did I miss and why is this the rage?
    I have an old school 3x9.......so help a brotha out.
    The idea of a single front chainring is cools I guess but whats the magic tooth number needed?

    I would like some insight as to when this too place.....

  2. #2
    Senior Member mrgrunt99's Avatar
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    I believe most 2x10 setups have a 39t outer chainring. I imagine if you did a 1x10 setup with a 32t front chainring, and a standard MTB 10 speed cassete you would a good gear range. The magic tooth number is whatever you will be comfortable with on steep climbs and adrenaline inducing downies!
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    Pedals, Paddles and Poles Daspydyr's Avatar
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    The terrain and the strength of the rider is what determines what you really need for rings. I still like the variety my 3X9 offers. A 2X9 can give you a wide spread and can probably stretch as far as a 3X9. A tad less weight and less shifting would be my guess for the 2X9. Since I ride pavement to get to my trails, I like the 3X9 setup. A 1X9 can save you TAD X's 2 if you get the range that you like.
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    Senior Member YamiRider1316's Avatar
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    for me 32t with an 11-36
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  5. #5
    Ride On. Underground's Avatar
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    I'm debating on swapping my HiFi to a 2x10 setup. Possibly a 38/24.
    '10 Trek 1.5; '10 Specialized Hardrock Sport Disc 29er; '12 Trek Transport; '11 Gary Fisher/Trek HiFi Plus 29er; '96 Cannondale M400 - Sold = Regret
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  6. #6
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    I ride 32t up front with 11-34 9spd cassette but it's a 29er with tall tires. Just keep an eye on the highest and lowest gear you use regularly on your current setup, then muck about in a gear calculator to find the best matching setup for that range.

  7. #7
    Two-Wheeled Aficionado ColinL's Avatar
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    I have a 26" bike with 2x10- 28/39 rings and 11-36 cassette. In Kansas, I can actually ride most trails entirely in the big ring. But I would hate a 32T single because I run out of gear pretty quickly on any sustained downhill section, which is especially annoying if you're out with buddies on a gravel road ride. (I can bring my CX bike instead, but it beats me up on washboard roads.) 28x36 is more than adequate even on the steepest stuff I can do-- I'm no trials rider, so it's better for me to walk when it gets ultra slow and techy.

    If you have a 29er I would suggest using no bigger than 38T. I would also caution you to be sure your rear derailleur has enough capacity to use a 11-36 or 12-36 cassette with the 2x10 crankset you choose. That's how I ended up with a 28T small ring-- my SRAM x9 type 2 midcage can't handle the 11-36 cassette otherwise.

  8. #8
    Official Website Waterboy born2bahick's Avatar
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    I dropped the 39 tooth off the cranks and just run the 26 tooth in a 1X10. ditching the fr derailuer, shifter,cable and housing lost almost a pound off the bike. plenty of gearing for my trails. gravel rides leave me spinning my ass off though.

  9. #9
    Two-Wheeled Aficionado ColinL's Avatar
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    My bike weighs 24.5 pounds ready to ride. So, I'm pretty happy about being able to pedal faster than 13 mph.

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