Creo 2 Carbon Cranks

[Dazmanturbo]

But can you send link to those DUB cranks that you say are very expensive, just for reference? Those force which I found also called DUB cranks, so it is confusing.

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These are just the carbon crank arms for the Levo 2, but share the same fitment as the Creo 2. DUB refers to the spindle size (28.9mm I think). When looking for cranks, you must have 2 arms with no spindle attached, same as on the Creo 2

 

[PetroK]

I see, so this are MTB one's, they for sure has wider Q factor. So actual situation is, that actually seems Specialized or any other brands like SRAM doesn't offer any kind of cranks specifically for Creo SL2, regardless of price.

 

[Dazmanturbo]

I see, so this are MTB one's, they for sure has wider Q factor. So actual situation is, that actually seems Specialized or any other brands like SRAM doesn't offer any kind of cranks specifically for Creo SL2, regardless of price.

I was using these as an example of what you are looking for, 2 separate arms with the DUB / BB30 interface to fit on to the motor spindle. I was not going to spend £500 on cranks when I could do the same for £120. My cheap carbon BB30's have been flawless for the last 1000 miles. The SRAM website is next to useless for Creo 2 parts

 

[JDNC]

Question for those that have replaced the alloy arms with carbon, how noticeable the difference? I have a Creo 2 expert.

 

[Dazmanturbo]

Question for those that have replaced the alloy arms with carbon, how noticeable the difference? I have a Creo 2 expert.

The carbon cranks are a fair bit lighter than the alloy ones. in the 175mm the alloy ones were 280g and the carbon ones about 170g. Although 100 odd grams a side does not sound much, done as a percentage, this is roughly a 65% drop on rotational mass. The carbon cranks do spin up quicker for sure. Not noticed any difference in stiffness or q factor

 

[JDNC]

Had my LBS order a set from Specialized. They were $370 USD. Not sure how much of a difference they make but look great on my bike.

 

[Dazmanturbo]

Had my LBS order a set from Specialized. They were $370 USD. Not sure how much of a difference they make but look great on my bike.

They will be much lighter than alloy ones, mine were 270g v 180g a side from memory. They spin up much quicker I find

 

[eddiecreo]

Thought I'd report my experience. Found a new old stock Force Press fit 30 crankset. I'm a pretty good mechanic and I can tell you getting the lock tighted bolt out of the non-drive side crank arm was a challenge. It took lots of pounding with a rubber mallet to get it loose. I had the 10mm hex locked into my vise and pounded on the crank arm until I thought it might break. It did not break and the bolt finally came loose. Then the second step to remove the spindle also required some hard pounding. Got it done but not for the faint of heart.

 

[Dazmanturbo]

Thought I'd report my experience. Found a new old stock Force Press fit 30 crankset. I'm a pretty good mechanic and I can tell you getting the lock tighted bolt out of the drive side crank arm was a challenge. It took lots of pounding with a rubber mallet to get it loose. I had the 10mm hex locked into my vise and pounded on the crank arm until I thought it might break. It did not break and the bolt finally came loose. Then the second step to remove the spindle also required some hard pounding. Got it done but not for the faint of heart.

The first time you do it, it is not for the faint hearted. I have done 3 of them now and the second two came out easy. Just knowing how heavy handed to be

 

[eddiecreo]

Installed crank arms today on Creo 2. Quite the DIY project. Not sure I will ever notice the weight reduction but I am making my Creo 2 Comp lighter with crank arms and 1100 gram carbon wheels to replace the 2000 gram alloys. A gram here a gram there. What the heck?

 

[Dazmanturbo]

Installed crank arms today on Creo 2. Quite the DIY project. Not sure I will ever notice the weight reduction but I am making my Creo 2 Comp lighter with crank arms and 1100 gram carbon wheels to replace the 2000 gram alloys. A gram here a gram there. What the heck?

I did notice the difference and found they were quicker to spin up. 200g is a nice little gram saving in my book

 

[stompandgo]

1kg total is very significant weight savings.

 

[Allan47.7339]

1kg total is very significant weight savings.

Edit I missed the wheel change. I think the total is really under 400g for the cranks and frequently they are changing length too so it's a bit less. Somewhere I have the numbers for a Praxis 165mm alloy vs 165mm carbon but it was about 2.5oz per side or 142g total. The carbon 165mm cranks were an add on to a new 1.1 motor I had purchased from a third party.

 

[mschwett]

Installed crank arms today on Creo 2. Quite the DIY project. Not sure I will ever notice the weight reduction but I am making my Creo 2 Comp lighter with crank arms and 1100 gram carbon wheels to replace the 2000 gram alloys. A gram here a gram there. What the heck?

there are lots of grams to be had. took +/- 5lb off my creo 1

 

[Jeremy McCreary]

there are lots of grams to be had. took +/- 5lb off my creo 1

Curious how much that cost in $/gram and where you felt the most benefit — climbing, general responsiveness, etc.

 

[stompandgo]

Wheels first, almost always.

 

[mschwett]

Curious how much that cost in $/gram and where you felt the most benefit — climbing, general responsiveness, etc.

as you might guess, i have that spreadsheet lol. looking back it was ±4lb apples to apples, there are a few things i've forgotten or don't have weights for like bottle cages, lights, bar tape, etc. the cost per gram ranges from less than a dollar a gram to $5 a gram, but the biggest difference was absolutely the rear wheel - total weight savings 467 grams, of which 190g was going from the stock sunrace cassette to a sram 10-42 and the rest is the wheel and tire. that's an entire pound of rotating mass - imagine pouring an entire 16oz soda bottle into your tire and hub, lol. and of course nice carbon wheels are better at reducing vibration and harsh bumps, and more aero. certainly the biggest possible difference, especially with tires of the correct width for the rim (in this case they were 32mm)

the next most noticeable as a combination was going from crazy heavy freerider pro shoes, platform pedals, and aluminum cranks to super light road shoes, speedplay pedals, and carbon cranks. total reduction almost 1.5lb! now imagine a 12 oz soda can attached to each foot, going around and around and around. of course the pedals don't go around as fast as the rear tire and the weight is much closer to the center of rotation, but still very noticeable, and of course being clipped in is a whole different feeling.

after the wheels the next biggest improvement in "feel" was the one piece alpinist carbon bar, 220g of weight reduction (good value today at around $1.3/g but i think at the time it was more expensive) but a really nice low-vibration feel and super sleek look for the front end, for a non-integrated-cable bike!

in the end the bike was nicer than the s-works version with the exception of the brifters and rear derailleur. upgrading those actually wouldn't have saved meaningful weight, but as you know i'm a huge fan of electronic shifting.