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  1. #1
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    Trek/ Gary Fisher 29ers with 180mm Crankarms

    Hey all
    Anyone using 180mm cranks on their Trek/ Gary Fisher 29er bike? I'm intersted in hearing from those with the x-caliber, Cobia or Mamba. I know these bikes share the same frame. I am looking at going with Race Face Turbine cranks and using the Narrow Wide chainring. Just wanted to know if anyone had issues with pedal strikes, noticed a better ride or other issues. I'm 6'7" and would like to get the seat down a little more.

    Thanks

  2. #2
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    You'll get more pedal strikes the lower your pedals - the same is for any frame. As for getting your seat down - is it worth it for 10mm? I'd guess you were currently on 170mm?

  3. #3
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    I'm on a 23" Mamba with 175mm cranks. Is it worth it? That is what I'm trying to find out. I would like read about someone with the same bike that went with 180 cranks and felt like they made the right choice.

  4. #4
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    Well I ride with 180mm on my bikes and they did feel different from 17omm which I had before - but not much. It won't give a 'better ride' because you have your cranks horizontal for most of the tricky stuff. I'm the same height as you and ride similar sized bikes. My advice would be to keep a look out for used 180mm cranks and if you do buy new, wait until you actually need new ones. I'd doubt you'd notice enough of a difference to make it worthwhile but for the cost of a used one it might be - and you'll have a spare for the spares box!

  5. #5
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    Not worth it IMO.
    6'8" and riding 175's on my main rides (Superfly, Jet9rdo). I have a SS that came with 180's, but I rarely ride the bike.
    Some feel longer pedals are better for us tall guys, some (including me) don't.

  6. #6
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    I went ahead with the 180mm cranks. I wanted to do a 1x10 but my current FSA cranks would not fit the bill. I ended up with a Shimano double. I took the rings off and added a Race Face N-W 34T chainring. I also went with a x9 type 2 rear derailleur. I've done over 20 miles on the bike so far. I like the way things feel. I was able to put the seat down a little. I am matching last years times after a long snowy winter. So far so good...

  7. #7
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    The sum total of this equation is riding style. Do you climb and ride trails like you would on the road, standing only to pass the occasional greyhair or get away from your friend's annoying story about last weekend's sexcapades, or are you out to kill that beast every time your pedals spin?

    There is little benefit to crank length when you stand, unless your cranks are WAY off in size, like 20mm or more off. Anything less is corrected by selecting the correct gear.
    For seated spinning, however, even a 5mm crank change (0.40" stroke change) can mean the difference between knees hurting after 20 miles vs 100 miles, heartrate running at 60 vs 70 on that climb, butt feeling cozy Vs HOLY CRAP THERE'S A WASP IN MY SHORTS!

    Got spin? That new $350 crank is worth every penny. Hulk smash? That awesome $50 deal on a mint used crank was $50 too expensive.

  8. #8
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    Trek/ Gary Fisher 29ers with 180mm Crankarms

    I ride 180s on my SS, for little extra leverage. But not on my FS XC nor my FB.
    Ben - Clydesdale - Type II Diabetic - 6'7", ~278lbs in 09/2011 - A1C 9.4%, ~228lbs in 07/2012 - A1C 5.6%, ~240lbs in 05/2013

  9. #9
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    6.2' riding 180mm XTR 970 cranks
    Trek/ Gary Fisher 29ers with 180mm Crankarms-img_5441-m.jpg

  10. #10
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    I just ordered Race Face Turbine Cranks in 180mm for my 2011 Trek Cobia. I used to get pedal strikes on my stock 175 cranks when I was running the stock rear tire. Increased the rear tire volume which made it like an inch or more taller in the rear. Thinking the 5mm difference won't strike any worse than stock.

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