not seeing value in carbon cranks [yet?]
12-23-20, 01:06 PM
#1
Junior Member
Thread Starter
Join Date: Dec 2020
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
not seeing value in carbon cranks [yet?]
I just weighed two cranks, one a new carbon shimano dura ace and, an old [30 years?] campagnola crank...
these two units were very close in weight - the shamano was .2 onces lighter....
are there other advantages to carbon - say is it stiffer?
these two units were very close in weight - the shamano was .2 onces lighter....
are there other advantages to carbon - say is it stiffer?
12-23-20, 02:41 PM
#3
Guest
Join Date: Sep 2020
Posts: 2,888
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 1346 Post(s)
Liked 3,270 Times
in
1,439 Posts
12-23-20, 04:30 PM
#4
Senior Member
Join Date: Sep 2009
Posts: 1,971
Bikes: Habanero Titanium Team Nuevo
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 399 Post(s)
Liked 185 Times
in
121 Posts
Agreed and basically you cannot really beat Shimano Cranks 105 and above for shifting and performance in my opinion. It really is what works and for mortals not pros Shimano Cranks with Shimano drivetrain are pretty consistently reliable. Carbon Cranks are not a better option.
Likes For deacon mark:
12-23-20, 07:00 PM
#5
Senior Member
Join Date: Aug 2009
Posts: 2,385
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 1557 Post(s)
Liked 1,732 Times
in
972 Posts
Keep in mind that the Hollowtech II crankset includes the spindle. A typical external bottom bracket weighs 100g. A typical square taper bottom bracket like that for the old Campy crankset weighs 250g to 320g.
Likes For icemilkcoffee:
12-23-20, 10:19 PM
#6
Newbie
Join Date: Dec 2020
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Also keep in mind that weight isn't the only advantage. Greater stiffness-to-weight ratio means that they can be either freaky stiff for the same weight or really light for the same stiffness, or both a fair bit stiffer and lighter than aluminum at the same time. There are some aluminum cranks lighter than my FSA SL-K Lights but none I've tried that feel quite the same when you really stomp on them.
12-24-20, 08:06 AM
#7
Senior Member
Join Date: May 2013
Location: Kips Bay, NY
Posts: 2,212
Bikes: Ritchey Swiss Cross | Teesdale Kona Hot | Haro Extreme | Specialized Stumpjumper Comp | Cannondale F1000 | Shogun 1000 | Cannondale M500 | Norco Charger | Marin Muirwoods 29er | Shogun Kaze | Breezer Lightning
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 576 Post(s)
Liked 1,000 Times
in
488 Posts
I did the math on my recent build and opted to go crabon to hit weight.
Easton EC90: arms and spindle 352g + 30/46 chainrings 182g + BB 91g = 625g
GRX810: arms, spindle, and rings 722g + BB 77g = 799g
As for the cost, its your money; only you can decide "if its worth it or not." I've smeared a bit of lipstick on my pigs...
I also have an Al GRX crank and the EC90 is stiffer, GRX shifts better but only a tiny bit so. Easton has lower Q and road chainline, and those were other factors; its not just weight and cost.
Easton EC90: arms and spindle 352g + 30/46 chainrings 182g + BB 91g = 625g
GRX810: arms, spindle, and rings 722g + BB 77g = 799g
As for the cost, its your money; only you can decide "if its worth it or not." I've smeared a bit of lipstick on my pigs...
I also have an Al GRX crank and the EC90 is stiffer, GRX shifts better but only a tiny bit so. Easton has lower Q and road chainline, and those were other factors; its not just weight and cost.
