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Thread: seat bounce

  1. #1
    rda
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    seat bounce

    got a mukluk3 a few weeks ago and am having a ball on it. one issue i have been having though is a sore but (taint area) from all the bouncing. I have been riding regular mtb for years and not ever had much issue. I had hard tails untill just recently.

    I'm wondering:

    1- could it just be the seat isn't compatible with my body? (stock seat)
    2- is it all the bouncing you get from the tires?

    I have an old thudbuster i was thinking about trying. Anyone use these on the fat bikes and like them? I liked it on my 29r hard tail i rode last year.

  2. #2
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    lots of folks using a thudbuster, and liking it, worth a shot if you have one laying around. That said, try tinkering with your tire pressure. I find that when my bike gets the bounce, it means I have the pressure too high.

  3. #3
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    Let more air out and go slower.

  4. #4
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    Quote Originally Posted by alphazz View Post
    let more air out and go faster.
    ftfy.


  5. #5
    rda
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    ive been running 5-6 psi. i will need to get an adaptor to run my thudbuster, post is too small.

  6. #6
    rda
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    another note, i weigh around 223 lbs before gear, so 5-6 psi gives a pretty good squish for me. last night i had around 4 in the front to get more float. not sure on back, i just let air out untill i got wrinkles. still got plenty of bounce. butt and back got sore

  7. #7
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    I'd bet a lot of it is pedaling technique. Flats or clipped in?

  8. #8
    rda
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    flats. i have noticed the faster you try to go the more it starts bouncing.

  9. #9
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    Yup, work on being smoother. I think it'd be tougher with flats as I experience more pedaling-induced bounce with them as well...but I've barely ridden flats in the last 15 years and finally threw some on the Pugs this winter. I'm sure I need to work on technique too

  10. #10
    rda
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    i run clipless on mtb. with all the snow around here and my intended use for this bike i put flats on it. it's not just pedaling that makes it bounce. last weekend conditions were perfect and my groomed trail had frozen nice and you could get on the big ring in front and go pretty fast. there are lots of bumps in trail though and each one would get you bouncing pretty good. i had to ride with but off the seat a bit. buddy was out on his new fattie too and he said same thing. he is top rider in state for mtb xc, so i doubt he has any pedaling issues.

    to me it just seems more inherant of the balloon tires. I used to have a honda 3 wheeler that didn't have any suspension, and it bounced a lot too.

    main thing i'm looking for is seat/thudbuster recomendations.

  11. #11
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    Get that phatty on some rollers and get smooooove:0)

  12. #12
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    I don't have a fat bike, but I do ride rigid.

    Try getting out of the saddle more...I know it's what I've got to do on a regular rigid 29er...

    SPP
    Rigid.

  13. #13
    rda
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    Quote Originally Posted by SlowPokePete View Post
    I don't have a fat bike, but I do ride rigid.

    Try getting out of the saddle more...I know it's what I've got to do on a regular rigid 29er...

    SPP
    i already do that by habit from my years on hard tail. i still do it on my fs bike too. hard to stay out of saddle for the whole loop though. i mainly just get up for the bigger stuff. problem is, the big bouncy tires bounce on little stuff too.

  14. #14
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    I've found this to be the case on the Moonlander I ride sometimes. Putting a Thudbuster on it worked wonders.
    I'm a mountain bike guide in South West Utah

  15. #15
    rda
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    Quote Originally Posted by Silentfoe View Post
    I've found this to be the case on the Moonlander I ride sometimes. Putting a Thudbuster on it worked wonders.
    great, and other good news, i found that i already had the shim i needed to go from 27.2 to 31.6 so i can try my thudbuster out and report back. conditions are terrible now though. snow is melting fast so speeds are very slow now. however, i did get some bounce last night even at slow speeds which could be the pedal technique others mentioned. i normally only noticed when under a big load chuggin up a hill with the rolling resistance of the melting snow pack.

  16. #16
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    It might be interesting to play with cadence to see if that affects anything for you. I find the best cadence changes with snow conditions as well as terrain , and could be different than your usual road or dirt mtb . Saddle hight might effect things as well.

  17. #17
    rda
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    just went for a short ride and initial feel is much better with the thudbuster. i already had a seat mounted to post, so that could be skewing the results too.

  18. #18
    rda
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    general ideas to try that work for you?

  19. #19
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    just purchased thudbuster LT after reading these posts too
    Last edited by deerock; 02-19-2014 at 12:34 PM.
    I have too many bikes, but it's not enough

  20. #20
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    I would also consider a skin lube like Chamious Butt'r from Paceline. It keeps the friction to a minimum and that's half the battle.
    The most expensive bike in the world is still cheaper than the cheapest open heart surgery.

  21. #21
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    Quote Originally Posted by Anthem1 View Post
    Get that phatty on some rollers and get smooooove:0)
    You rang?

  22. #22
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    Quote Originally Posted by sickmtbnutcase View Post
    I'd bet a lot of it is pedaling technique.
    Yup this!! It's like being on a full squish with no platform or rebound. Practice your peddling!!

  23. #23
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    Quote Originally Posted by bdundee View Post
    Yup this!! It's like being on a full squish with no platform or rebound. Practice your peddling!!
    Exactly! If you are riding and you notice you start to bounce, immediately shift to a harder gear and you will see that you stop bouncing due to the change in cadence. If you practice smooth pedaling ever thing will improve.

  24. #24
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    I'm really impressed with the amount of pedal technique improvement I've made since riding my fatbike... Smooth and powerful will take care of your bounce issues in most cases.

  25. #25
    rda
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    nice info! i will try that!

  26. #26
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    Yep, smooth out your spin, it'll make a world of difference.

    If you chop at the pedals, you'll bounce like a beach ball.......
    This is a Pugs not some carbon wannabee pretzel wagon!!

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  27. #27
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    Seats are too much of personal preference for me to make a recommendation. I think the best advice has already been given: the interplay of cadence, pressure, and gearing is very important for smoothing out the bounce. I went the thudbuster route, but now that I've figured things out mine is sitting on the shelf. One thing that hasn't been mentioned is tires. I find the 27 tpi tires ride very harsh and my back and ass would hurt after even a short ride on a rough trail. I don't have that problem with the 120 tpi tires.
    The older I get the better I was...

  28. #28
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    Quote Originally Posted by rda View Post
    main thing i'm looking for is seat/thudbuster recomendations.
    I just went thudbuster for the very same reason. Wouldn't go back. It takes the edge off. If you've used one before on a hardtail you will know what they do for the ride.
    ...Be careful what you're looking at because it might be looking back...

  29. #29
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    It's amazing what the fat bike does to improve ones cycling 'softskills'. Pedalling technique, line choices, power. I find my first rides in my annual spring break vacation in Arizona on my regular full squish bike are very eye opening after grinding out many miles on the fatty in tight single track. Full squish in the summer forgives many small technique issues.

  30. #30
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    Quote Originally Posted by Forster View Post
    I would also consider a skin lube like Chamious Butt'r from Paceline. It keeps the friction to a minimum and that's half the battle.
    ^ I concur. I agree with all the other points about the saddle type and adjustment, thudbuster, etc. However, in my case, I found that I was doing alot more shifting and sliding on the saddle as I fought to control/balance the bike in muddy/snowy conditions. The Chamois cream was just the ticket.
    I'm on a Selle Anatomica X saddle.

  31. #31
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    My Brooks Flyer fixed this. The thudbusters are great but I find that because they move backwards when compressed, your seating position moves back.

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