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Old 07-28-11, 09:20 AM   #1
marcosbullock
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How important is weight?

For a newbie Cat 5 racer?

My bike, without bottles, weighs right at 19lbs. It's a Fuji carbon and is my first "real" race bike.

I've been looking, though, at new frames and or bikes and components. Just toying with the ideas of what I would do if I won the lotto. Haha

My question is, how important is it to shave weight from a bike? If I upgraded my choice in bike slightly I would be in the 18lb range. Better components and wheels could shave maybe another 2lbs. So would a 3lb weight reduction be that much of a difference for a 160-165lbs cyclist? Is there that much of a difference between a 15lb rig and an 18lb rig?

I know riders who have "middle of the Cat 5 pack" skill levels who are spending $2000 on lighter SRAM Red grouppos and sub 1300g wheelsets and I'm honestly just wondering if they're seeing any real benefit from it. So are weight savings worth the cost and how much weight would be enough shaved to make a real difference in your avg mph? Thoughts?

-Marcos
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Old 07-28-11, 09:25 AM   #2
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I'm sure there's a reason for making all that lightweight crap....
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Old 07-28-11, 09:25 AM   #3
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I'm sure there's a reason for making all that lightweight crap....
usually it has to do with making lots more money...
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Old 07-28-11, 09:31 AM   #4
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I'm sure there's a reason for making all that lightweight crap....
Is there? Or is it the equivalent of a $800 carbon fiber rear spoiler on a 1993 Honda Civic hatchback?

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Old 07-28-11, 09:31 AM   #5
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10lbs will roughly cost you about 3 min per hour of 5-6% climbing.
if you're around 150-170lbs and doing approx 250 watts (about 10mph).

T
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Old 07-28-11, 09:31 AM   #6
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I can't say it doesn't matter at all but it matters VERY little.

Just ride. Your bike is not holding you back.
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Old 07-28-11, 09:33 AM   #7
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It will matter when you start losing the race by 3 seconds every time. Until then, don't worry about it.
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Old 07-28-11, 09:33 AM   #8
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You can keep your 19lbs...I'll keep my 16 and believe it makes me speedy! Lighter bikes like cars take less energy to move...would you rather pull a 300lbs sled or a 250lbs sled?
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Old 07-28-11, 09:36 AM   #9
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Difference in MOST of the carbon for rice burners to bike stuff...the ricer stuff is cheap carbon (different weaves and grades) now you can build a fast civic with lightweight parts instead of eBay junk. Not all carbon wheels for bikes are light, or quality.
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Old 07-28-11, 09:37 AM   #10
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weight you remove from your bike is weight that doesn't come back.
Unlike weight from the engine, which fluctuates constantly.

T
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Old 07-28-11, 09:38 AM   #11
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You can keep your 19lbs...I'll keep my 16 and believe it makes me speedy! Lighter bikes like cars take less energy to move...would you rather pull a 300lbs sled or a 250lbs sled?
I would imagine there's a slight difference between shaving 50lbs off a sled and 3lbs off a bike. I'm just wondering how much of a difference would be made when you literally only shave about 1.6% off your total bike/body package. Also taking into account the massive amount of money that is required to shave such a minimal amount.
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Old 07-28-11, 09:44 AM   #12
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I can't say it doesn't matter at all but it matters VERY little.

Just ride. Your bike is not holding you back.
Especially if you are doing flat-ish races. The big gains come from fitness, experience and tactics.
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Old 07-28-11, 09:44 AM   #13
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I imagine it's because of the stiffness and the actual geometries that go into making bike parts. A car hood isn't going to make a riders ability to drive comfortably harder. Handlebars, seat, stem, fork, frame etc. Greatly affect the engine(rider)
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Old 07-28-11, 09:48 AM   #14
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Especially if you are doing flat-ish races. The big gains come from fitness, experience and tactics.
Very true but if there's room for weight loss and an advantage why not take it? Like NASCAR and the UCI...they regulate the weight to keep things relatively level...ish
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Old 07-28-11, 09:49 AM   #15
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You can keep your 19lbs...I'll keep my 16 and believe it makes me speedy! Lighter bikes like cars take less energy to move...would you rather pull a 300lbs sled or a 250lbs sled?
Comparing sleds and cars to bikes isn't gonna get you anywhere. There is also this thing called inertia. Light object stops easier and accelerates faster, but doesn't stay at speed as easy and descends slower. If your bike is 30 lb's it's gonna matter. If it's in the range of 18 to 23 let's say, very little effect on the speed except when climbing.
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Old 07-28-11, 09:50 AM   #16
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Train on a 23 lb bike. Hard. Then when you race on your 19 lb bike, you'll feel like you're flying. Next question?
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Old 07-28-11, 09:53 AM   #17
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I have too much weigh to shed from the engine to worry about shedding pounds of my bike. I always mused at people shedding grams from bikes when they are 20-40 lbs overweight.

Actually, now that I think of it maybe I should get a heavier bike to help shed more pounds. Anyone make a cast iron bike?
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Old 07-28-11, 09:53 AM   #18
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Train on a 23 lb bike. Hard. Then when you race on your 19 lb bike, you'll feel like you're flying. Next question?
+1....I'm looking to train on one of those Fat tire beer bikes
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Old 07-28-11, 09:53 AM   #19
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Once I lose about 25 more pounds (I've already shed about 55), I'll worry about taking weight off my bike. Losing body weight is cheaper than losing bike weight.
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Old 07-28-11, 10:01 AM   #20
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Broad speaking, overall bike weight matters more so when climbing and is negligible on descends/flats.
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Old 07-28-11, 10:02 AM   #21
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Once I lose about 25 more pounds (I've already shed about 55), I'll worry about taking weight off my bike. Losing body weight is cheaper than losing bike weight.
Poignant suggestion. Everyone should be discussing/stressing about the engine.
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Old 07-28-11, 10:13 AM   #22
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Welcome to Road Racing.
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Now get on your cheap bike and give me a double century. You walking can of Crisco!!

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Old 07-28-11, 10:14 AM   #23
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For a newbie Cat 5 racer?
If you really want to know, you can work out the answer for yourself here; http://www.analyticcycling.com
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Old 07-28-11, 10:14 AM   #24
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Very true but if there's room for weight loss and an advantage why not take it? Like NASCAR and the UCI...they regulate the weight to keep things relatively level...ish
If it was free, then obviously ..... but it costs money, so there's a cost-benefit factor.
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Old 07-28-11, 10:21 AM   #25
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Welcome to Road Racing.
wtf?

this has been discussed numerous times over in the 41. Send it back
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