Ideas to lighten 2016 S-works Crux Disc

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boots2000
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Joined: Mon Oct 15, 2007 9:28 pm

by boots2000

I just built a new 2016 S-works Crux Disc.
I am really happy with the bike, but I am trying to find a few ideas to further lighten it-
It is 8.228 kg, or 18 lb. 2 oz.
Stock wheels, 9000 front der. and stock 685/785 Shifters and brakes.

Items changed
6800 GS Rear Der
SRM Spider
Praxis 110mm 34/50 chainrings
SRAM 1170 11-36 Cassette
Zipp SL stem
Specialized Carbon Compact handlebars
Reynolds Ouzo Seatpost
Fizik R1 Antares Saddle
Kenda Happy Medium 700x35mm tires
Shimano 9000 XTR pedals

Here are the items that I am most open to change
Saddle- would consider 00 or Specialized Phenom
Tires- but I like something that is not too slow on the road
Thru axle bolts- still using stock Specialized Labeled DT thru axle bolts
Seatpost- but must be setback- get a Ritchey Superlogic?

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rasmussloth
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by rasmussloth

Wheels. (if you can find any hubs to fit Specialized's stupid axle-standard)

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jipperd
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by jipperd

You might have a look at TiesT bike. He took his Crux to the max.
viewtopic.php?f=10&t=127130&p=1113655&hilit=crux#p1113655

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the_marsbar
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by the_marsbar

I am not sure how much weight would be saved, but one option for lightening the disc brakes would be exchanging the calipers with XTR ones (as far as I understand, the Ultegra calipers are similar to XT ones).

What are the wheels? I'd probably start with those, if they are heavy.

mattyNorm
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by mattyNorm

I'm pretty sure the road series calipers and levers are designed for a different fluid flow rate than mountain but I could easily be wrong

Narrowbars
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by Narrowbars

I'm running XTR calipers on my cx bike, saved around 35g per caliper

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Briscoelab
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by Briscoelab

Those wheels are pretty light for disc clinchers. I say just ride it and be happy.

You've added some heavier components (i.e. SRM, XTR pedals, VERY heavy cassette and medium cage ultra der). You could spend a LOT of money and not save much weight.

You should really only need an 11-36 range if you're running a 1x setup. Ditch that pie plate to something more reasonable.... you've got a 34t small ring, do you really need lower than 1:1 gearing? I would argue that if you do, then you don't need a 50x11 top gear.

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cerro
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by cerro

Tune chainrings or Extralite.
A lighter cassette, do you really need 11-36 with double in front?
Thru-axles will be hard as it's not regular axlestandard with 12x100 and 12x135.
Crank Brothers Eggbeater or Candy can save some
I have a set of 1300g tubulars on my Diverge. Tune King/Kong hubs with 25mm Light-bicycle rims. Works with some tweaks :)
Seatpost check if you can find a Engage Revit or the new "bent" Tune post if you want save weight for real

A lot to do on that bike, my Crux Elite X1 was 7,6kg last week.

boots2000
Posts: 1393
Joined: Mon Oct 15, 2007 9:28 pm

by boots2000

His bike is cool but it is a 1x with cantis and AX light tubulars.

jipperd wrote:You might have a look at TiesT bike. He took his Crux to the max.
viewtopic.php?f=10&t=127130&p=1113655&hilit=crux#p1113655

boots2000
Posts: 1393
Joined: Mon Oct 15, 2007 9:28 pm

by boots2000

I may check out the XTR calipers- that is a good tip.
I really do need the 11-36 gearing and mid cage derailleur. I do a lot of long off-road climbs. 11-12% for 20 minutes- sometimes more.
And I am not a bad climber.
It would be great if Shimano made an XTR level 11 speed 11-36.
Wheels are 1350- not bad for disc brake tubeless wheels?
Does anyone make thru axle bolts that are light for this application?

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rasmussloth
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by rasmussloth

Which wheels?

boots2000
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Joined: Mon Oct 15, 2007 9:28 pm

by boots2000

Wheels are stock Roval SL SCS- 1350 for a tubeless set.
I think it would be hard to improve on this without going to tubulars- and that ain't going to happen.


rasmussloth wrote:Which wheels?

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rasmussloth
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Location: Denmark

by rasmussloth

I'm surprised that it is so heavy.

Which crank?

Did you setup the Wheels tubeless?

I know you said that you need 11-36 but you could really save a lot of weight by changing to SRAM 1190 11-32 cassette.

boots2000
Posts: 1393
Joined: Mon Oct 15, 2007 9:28 pm

by boots2000

Specialized crank with SRM.
Yes, I am sure the 11-36 is heavier than Ultegra 11-32 by 100 grams- probably weighs double what the stock Dura-Ace 11-28 weighs.
You guys keep asking if one really needs an 11-36??? Come ride where I ride- you will want an 11-36.
I have many long climbs that are 10-12%- I like those climbs. I don't put along on the tourist paths. My FTP is close to 5 w/kg.
I wish Shimano made an XTR level cassette (or a SRAM 1190) but this is not the case.
I think the next challenge for Shimano is some gravel focused components- a medium cage clutch rear derailler (a light one) and also a light 11-36 cassette.

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joosttx
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by joosttx

boots2000 wrote:Specialized crank with SRM.
Yes, I am sure the 11-36 is heavier than Ultegra 11-32 by 100 grams- probably weighs double what the stock Dura-Ace 11-28 weighs.
You guys keep asking if one really needs an 11-36??? Come ride where I ride- you will want an 11-36.
I have many long climbs that are 10-12%- I like those climbs. I don't put along on the tourist paths. My FTP is close to 5 w/kg.
I wish Shimano made an XTR level cassette (or a SRAM 1190) but this is not the case.
I think the next challenge for Shimano is some gravel focused components- a medium cage clutch rear derailler (a light one) and also a light 11-36 cassette.


I ride a 32 + compact in the same area. But I just ordered a 11/36 so that I can get up some of those steep grades I avoid. 11/36 with a compact may not be a bad Idea.

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