Reduce weight with Carbon wheels?- Mtbr.com
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  1. #1
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    Reduce weight with Carbon wheels?

    Can a bike weight be reduced with carbon wheels?

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  2. #2
    Formerly of Kent
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    Yes.


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  3. #3
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    I second that yes.
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  4. #4
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    Nextie 80mm x 26" vs Mulefut 80mm x 26" Approximately 120 grams per rim, or about 8.5 oz for the pair. That's just simple weight difference. Weight is best lost on rims and tires rather than frame and components.

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  5. #5
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    It depends. I've had older carbon rims that are heavier than newer aluminum ones.
    Last edited by Volsung; 12-08-2019 at 11:26 AM.
    You change your own flats? Support your LBS and pay them to instead.

  6. #6
    All fat, all the time.
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    Maybe.
    Depends what wheels are already on it.

    Come on...

  7. #7
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    Rims are not lighter just because they are carbon, just need to compare the stated weights if that is your concern, better if you can weigh them yourself. Rarely an option.

  8. #8
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    helium is better...

  9. #9
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    troll

  10. #10
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    Like for like, you can build a superior wheel set in terms of strength, reliability & width at a lower weight out of CF.
    My opinion is to run lighter CF wheels, then run tire inserts to protect them and get a bunch of other benefits as well.
    Good luck.

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  11. #11
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    Yes carbon wheels are lighter but that's not the real benefit. The real benefit is performance, comfort, compliance and how fast them spin up. It also depends on what hubs you would pair up to the carbon hoops


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  12. #12
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    I have carbon wheels and they have been great. For the cost - if I had to do it over again, I would have them built using all of the same components but marge lites (instead of carbon). I have a set of those also and there just isn't a ton of real world difference, unless you get paid to race...

  13. #13
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    Quote Originally Posted by BlueCheesehead View Post
    troll
    Based on some of the other threads he's started he's probably not trolling.
    You change your own flats? Support your LBS and pay them to instead.

  14. #14
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    Quote Originally Posted by Volsung View Post
    Based on some of the other threads he's started he's probably not trolling.
    Not sure if this post is a troll too...
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

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  15. #15
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    Quote Originally Posted by Volsung View Post
    Based on some of the other threads he's started he's probably not trolling.
    More likely most of them are trolls. He tosses out a stupid question and then never comes back to discuss.

    Can anyone that has been on this site for 14+ years and have 3,000+ posts not know that carbon wheels can save weight? Seriously.

  16. #16
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    Master of the trolls, he is.

  17. #17
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    Nitrogen gas rims are way lighter than carbon.


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  18. #18
    be1
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    helluva question. are some bikes heavier than others?

    another wtf...

  19. #19
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    Reduce weight with Carbon wheels?

    Quote Originally Posted by Suns_PSD View Post
    Like for like, you can build a superior wheel set in terms of strength, reliability & width at a lower weight out of CF.
    My opinion is to run lighter CF wheels, then run tire inserts to protect them and get a bunch of other benefits as well.
    Good luck.

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    You are suggesting to spend tons of money on CF wheels to save weight and then add some massive inserts to protect them?

    Why not stay with the current tubeless setup and save the money?


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  20. #20
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    I'm fitting new hubs and carbon rims to my Fatboy Comp Carbon.

    Standard rims on my bike, minus any other bits, are ~930g apiece. Dual-layer carbon rims (to ensure 30psi capability) in the same size are 665-670g (measured weight). No rim band required, so about 60-70g per wheel additional weight reduction. Fitting on Onyx hubs, rear hub is 52g heavier than stock rear hub. Everything else will be exactly as I have it now.

    I'll weigh everything when the hubs arrive, before and after, but I'm expecting about a 600g reduction overall. That's about a pound and a quarter weight loss, with all of the weight loss being near the periphery of the wheel; should make spin up easier/faster. The Onyx hubs should roll more freely too due to ceramic hybrid bearings.

    I'll smile if the reduction is more than that, but I fully expect the upgrade to be both noticeable and significant.

    G

  21. #21
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    Quote Originally Posted by Picard View Post
    Can a bike weight be reduced with carbon wheels?

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    Absolutely. A quality carbon wheelset is a GREAT investment for a fattie, plus they're generally a much better option for setting up tubeless.

  22. #22
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    With the price of some CF rims, I can buy a Ti bike on the freakin wheel budget.
    Get fAt, Stay fAt, Ride fAt
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  23. #23
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    I am referring to fat bike wheels

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  24. #24
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    Quote Originally Posted by Picard View Post
    I am referring to fat bike wheels

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    Oh that is a completely different story. I am sure you will get radically different answers now.
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  25. #25
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    I think the biggest boon is with the reduced rotational weight in the momentum department. I got set up with a set of nexties last season & it really transformed the way the bike felt, but mostly was attributed to the reduced energy need to get up n go / maintain momentum. You can accomplish this w/ lighter alloy rims too.
    Happy trails!

  26. #26
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    Quote Originally Posted by Picard View Post
    I am referring to fat bike wheels

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    What color?

  27. #27
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    Quote Originally Posted by BlueCheesehead View Post
    What color?



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  28. #28
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    Fill the tires with helium. Ultimate bike weight reduction!!!

  29. #29
    be1
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    you should buy some CF rims and cut out the parts between the spokes. this will get you the lightest - maybe consider drillium hubs too

  30. #30
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    Quote Originally Posted by be1 View Post
    you should buy some CF rims and cut out the parts between the spokes. this will get you the lightest - maybe consider drillium hubs too
    ... and if you reduce the number of spokes to 6 and lace them ala Rolf you will really have something light.

  31. #31
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    good point. to carry your idea further you could get 36-hole rims - cut out the rim entirely between every 6th spoke or so - whatever works. then use your 6 spokes. could also cut out parts of the hub flange you don't need since you won't be putting spokes in the holes. along with the drillium you could get a 200 gram front wheel.

    now - what to do with that massive axle.

  32. #32
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    Quote Originally Posted by BroJangles View Post
    I think the biggest boon is with the reduced rotational weight in the momentum department. I got set up with a set of nexties last season & it really transformed the way the bike felt, but mostly was attributed to the reduced energy need to get up n go / maintain momentum. You can accomplish this w/ lighter alloy rims too.
    Happy trails!
    Umm, I notice the exact opposite, that heavy wheels and tires roll longer up transitions than lighter ones (but then require more when you put the power back down).
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

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  33. #33
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    Quote Originally Posted by Jayem View Post
    Umm, I notice the exact opposite, that heavy wheels and tires roll longer up transitions than lighter ones (but then require more when you put the power back down).
    Heavier wheels keep their momentum better than lighter wheels. So they are harder to accelerate and decelerate than lighter wheels.


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    Quote Originally Posted by BlueCheesehead View Post
    More likely most of them are trolls. He tosses out a stupid question and then never comes back to discuss. ...
    Possibly it's a serious question, but he doesn't know the side issues or consequences to be able to ask about them. He's hoping related info comes out in the answers, opening his eyes to the questions he doesn't know to ask.

    As others stated, if you change the weight you change the momentum. With the change in momentum I think it would depend on what kind of riding you're doing. Do you need/want better acceleration/deceleration, or do you want more momentum to power over variable terrain with less slowing?

    Momentum aside, compare the weight you save vs. how much payload you take on a ride. What you eat & drink before or during the ride, or carry with you. Is that reduced rim weight significant compared to your total payload.
    Rim-weight saving : Total Gross Loaded Weight.
    8 oz : 30 lbs bike + 170 lbs rider + ___ lbs of snacks, drink, clothes & boots, lock, pump, spares, etc.. Call it 220 lbs., just because.
    8 oz vs 220 lbs.?
    0.5:220, 1:440
    0.227%
    So straight weight, significant?

    Leaves the momentum.
    Crazy on this ship of fools...

  36. #36
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    ^^^ I'll stick with troll. There is a Dumb and Dumber chance it was serious...but a chance none the less.

    As for the physics, don't forget when you change direction in the horizontal plane a acceleration is induced, thus more mass = more force required. Also lets not forget about the gyroscopic effect of a rotating mass. More mass = more stability in a straight line, but much more effort to turn.

  37. #37
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    Quote Originally Posted by Canoe View Post
    Possibly it's a serious question, but he doesn't know the side issues or consequences to be able to ask about them. He's hoping related info comes out in the answers, opening his eyes to the questions he doesn't know to ask.

    As others stated, if you change the weight you change the momentum. With the change in momentum I think it would depend on what kind of riding you're doing. Do you need/want better acceleration/deceleration, or do you want more momentum to power over variable terrain with less slowing?

    Momentum aside, compare the weight you save vs. how much payload you take on a ride. What you eat & drink before or during the ride, or carry with you. Is that reduced rim weight significant compared to your total payload.
    Rim-weight saving : Total Gross Loaded Weight.
    8 oz : 30 lbs bike + 170 lbs rider + ___ lbs of snacks, drink, clothes & boots, lock, pump, spares, etc.. Call it 220 lbs., just because.
    8 oz vs 220 lbs.?
    0.5:220, 1:440
    0.227%
    So straight weight, significant?

    Leaves the momentum.
    If you carry 20 lbs of stuff, you donít need CF wheels. Performance is clearly not on your radar.

    But if you race, climb a lot, accelerate a lot, that 600-800g weight reduction will be felt and appreciated.


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  38. #38
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    Quote Originally Posted by serious View Post
    You are suggesting to spend tons of money on CF wheels to save weight and then add some massive inserts to protect them?

    Why not stay with the current tubeless setup and save the money?


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    As far as the money, that's not my primary concern and as such I don't consider $1500 for great wheels 'a ton of money'.

    Performance is my primary consideration. Weight, ride feel, & reliability are the 3 primary aspects of performance when considering wheels, in my opinion.

    Inserts allow me to smash way harder (on any wheel) with better overall performance, in spite of the 72 gram weight gain per wheel using my Tubolight inserts. Yes they protect my investment, but they also make trail carcass tires perform like DH carcass tires in the turns. Where a trail tire essentially folds under hard use in the turns, with an insert the sidewall is held up well. Why not just run a DH tire you might ask? Well they are heavy and roll very poorly because of the stiff carcass and I don't need the additional slash protection. Which brings me to another advantage of inserts: you can safely run lower pressures which lowers rolling resistance and increases traction.

    So ultimately, utilizing inserts with CF wheels I can maximize all performance aspects including: weight, ride feel, & reliability.

    Take care.



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  39. #39
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    ^^^Tubolight makes fat tire inserts? DH on a fatty?

  40. #40
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    Quote Originally Posted by BlueCheesehead View Post
    ^^^Tubolight makes fat tire inserts? DH on a fatty?
    Darn, I didn't realize that this was the fat bike forum.
    Sorry.

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  41. #41
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    Quote Originally Posted by Suns_PSD View Post
    Darn, I didn't realize that this was the fat bike forum.
    Sorry.

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    Aha, now I get your post. All good.


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  42. #42
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    How has Picard not been banned yet?

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