Addiction 2022.2
#3851
Klaatu..Verata..Necktie?
Join Date: May 2007
Location: SF Bay Area
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The Canyon has a carbon post. Given it's rated for heavier than I am, I don't worry too much about it.
__________________
"Don't take life so serious-it ain't nohow permanent."
"Everybody's gotta be somewhere." - Eccles
"Don't take life so serious-it ain't nohow permanent."
"Everybody's gotta be somewhere." - Eccles
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#3852
Klaatu..Verata..Necktie?
Join Date: May 2007
Location: SF Bay Area
Posts: 17,988
Bikes: Litespeed Ultimate, Ultegra; Canyon Endurace, 105; Battaglin MAX, Chorus; Bianchi 928 Veloce; Ritchey Road Logic, Dura Ace; Cannondale R500 RX100; Schwinn Circuit, Sante; Lotus Supreme, Dura Ace
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Position should be the same, but fractions of millimeters count here. If you want to test them, I'd go ahead and center the calipers on them, using the business card trick, and then see if you still get rub.
__________________
"Don't take life so serious-it ain't nohow permanent."
"Everybody's gotta be somewhere." - Eccles
"Don't take life so serious-it ain't nohow permanent."
"Everybody's gotta be somewhere." - Eccles
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#3853
Mostly Harmless
Join Date: Jul 2008
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#3854
Mostly Harmless
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#3855
Senior Member
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#3856
VFL For Life
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It's a mystery why anyone lives there.
Childhood favourite?
#3857
cowboy, steel horse, etc
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Cinque.
Wordle 320 5/6
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Wordle 320 5/6
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#3858
he said member
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#3859
Fat n slow
Join Date: Oct 2013
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I’d try it both ways, it sounds to me like you’re describing wheel flex that’s making the rotor ping
Last edited by phrantic09; 05-05-22 at 04:01 AM.
#3861
Senior Member
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I choose to blame all of you.
Wordle 320 X/6
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Wordle 320 X/6
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#3862
Fat n slow
Join Date: Oct 2013
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This weekend’s “race”
https://www.strava.com/routes/2954800741709751144
This is only about 20 miles of dirt that’s pretty well groomed. All of the major climbs are dirt which add some challenge. One of them last year I spun out and had to get off and walk, hopefully wider tires and better gearing will fix that. Believe it hits ~18% in a few places. Last year was 28s with 36/30 as lowest gear and this year will be 32s with 31/34.
pretty excited and have no real expectations, just do it for fun.
https://www.strava.com/routes/2954800741709751144
This is only about 20 miles of dirt that’s pretty well groomed. All of the major climbs are dirt which add some challenge. One of them last year I spun out and had to get off and walk, hopefully wider tires and better gearing will fix that. Believe it hits ~18% in a few places. Last year was 28s with 36/30 as lowest gear and this year will be 32s with 31/34.
pretty excited and have no real expectations, just do it for fun.
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#3863
Super Modest
Join Date: Jun 2002
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#3864
So it is
Join Date: Sep 2008
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#3865
So it is
Join Date: Sep 2008
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This weekend’s “race”
https://www.strava.com/routes/2954800741709751144
This is only about 20 miles of dirt that’s pretty well groomed. All of the major climbs are dirt which add some challenge. One of them last year I spun out and had to get off and walk, hopefully wider tires and better gearing will fix that. Believe it hits ~18% in a few places. Last year was 28s with 36/30 as lowest gear and this year will be 32s with 31/34.
pretty excited and have no real expectations, just do it for fun.
https://www.strava.com/routes/2954800741709751144
This is only about 20 miles of dirt that’s pretty well groomed. All of the major climbs are dirt which add some challenge. One of them last year I spun out and had to get off and walk, hopefully wider tires and better gearing will fix that. Believe it hits ~18% in a few places. Last year was 28s with 36/30 as lowest gear and this year will be 32s with 31/34.
pretty excited and have no real expectations, just do it for fun.
#3867
Senior Member
Join Date: May 2016
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#3868
Should Be More Popular
Join Date: Dec 2007
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#3869
Senior Member
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I’ve been talking to seattle forrest, he has a C3 with ardennes and hasn’t ever had brake rub problems. So now I wonder if it’s the cheaper carbon my bike is made of, or the super teams, though they seem bullet proof not sure what that says about flex’s.
if I put my bontrager wheel on the cervelo to test out the wheel theory, would it matter that the rotor on the bontrager wheel is sram? I would not touch the brake. I could tell in a matter of seconds whether or not the rub was there.
if I put my bontrager wheel on the cervelo to test out the wheel theory, would it matter that the rotor on the bontrager wheel is sram? I would not touch the brake. I could tell in a matter of seconds whether or not the rub was there.
If there's no rub in the stand but there's rub on the road, that obviously means that there's a change in relative position between the rotor and pads. The rotor is bolted to a solid, machined hub. The hub is being held in place by a ~1/2" thick axle. The axle is fastened in to the dropouts and there's only a couple inches of carbon fork between the axle and caliper - there's virtually no room for movement if everything is secured properly. If things aren't secured properly and if things aren't quite square and true, you get problems like you're getting.
Make sure your rotor is true and properly tightened. Make sure your calipers are centered and aligned. Make sure you're consistently tightening the thru-axel. If you can't consistently tighten the TA because if its design, get a Robert axle and use a torque wrench. Done and done.
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#3870
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Wordle 320 3/6
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#3871
• —
Join Date: Jun 2015
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have not had that happen yet. I had the rear wheel not what to open once in Dallas. That was a head scratcher.
I’ve been talking to seattle forrest, he has a C3 with ardennes and hasn’t ever had brake rub problems. So now I wonder if it’s the cheaper carbon my bike is made of, or the super teams, though they seem bullet proof not sure what that says about flex’s.
if I put my bontrager wheel on the cervelo to test out the wheel theory, would it matter that the rotor on the bontrager wheel is sram? I would not touch the brake. I could tell in a matter of seconds whether or not the rub was there.
I’ve been talking to seattle forrest, he has a C3 with ardennes and hasn’t ever had brake rub problems. So now I wonder if it’s the cheaper carbon my bike is made of, or the super teams, though they seem bullet proof not sure what that says about flex’s.
if I put my bontrager wheel on the cervelo to test out the wheel theory, would it matter that the rotor on the bontrager wheel is sram? I would not touch the brake. I could tell in a matter of seconds whether or not the rub was there.
If a closet door is sticking, you don't try a different door - you make sure that the hinges are tight, that the frame is plumb and that the door is square. Everything else is a shot in the dark and a waste of time when the basics haven't yet been addressed, IMO.
If there's no rub in the stand but there's rub on the road, that obviously means that there's a change in relative position between the rotor and pads. The rotor is bolted to a solid, machined hub. The hub is being held in place by a ~1/2" thick axle. The axle is fastened in to the dropouts and there's only a couple inches of carbon fork between the axle and caliper - there's virtually no room for movement if everything is secured properly. If things aren't secured properly and if things aren't quite square and true, you get problems like you're getting.
Make sure your rotor is true and properly tightened. Make sure your calipers are centered and aligned. Make sure you're consistently tightening the thru-axel. If you can't consistently tighten the TA because if its design, get a Robert axle and use a torque wrench. Done and done.
If there's no rub in the stand but there's rub on the road, that obviously means that there's a change in relative position between the rotor and pads. The rotor is bolted to a solid, machined hub. The hub is being held in place by a ~1/2" thick axle. The axle is fastened in to the dropouts and there's only a couple inches of carbon fork between the axle and caliper - there's virtually no room for movement if everything is secured properly. If things aren't secured properly and if things aren't quite square and true, you get problems like you're getting.
Make sure your rotor is true and properly tightened. Make sure your calipers are centered and aligned. Make sure you're consistently tightening the thru-axel. If you can't consistently tighten the TA because if its design, get a Robert axle and use a torque wrench. Done and done.
Have you taken a plastic tire lever and pressed your pistons in and then made sure they're retracting?
#3872
Senior Member
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I have. The rotor has a slight bent in it. However, spinning in the bike stand with a white sheet of paper behind it there is plenty of clearance and it doesn’t rub, when I ride it sitting down 75 percent of the time it doesn’t rub. When I stand it’s a constant rub. The skewer is as tight as I can make it.
sounding like a new axle and new rotor. I’m just super skeptical that’s going to fix the problem. And furthermore how the hell do my rotors keep getting bent?
#3873
Senior Member
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#3874
Senior Member
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I have. The rotor has a slight bent in it. However, spinning in the bike stand with a white sheet of paper behind it there is plenty of clearance and it doesn’t rub, when I ride it sitting down 75 percent of the time it doesn’t rub. When I stand it’s a constant rub. The skewer is as tight as I can make it.
sounding like a new axle and new rotor. I’m just super skeptical that’s going to fix the problem. And furthermore how the hell do my rotors keep getting bent?
sounding like a new axle and new rotor. I’m just super skeptical that’s going to fix the problem. And furthermore how the hell do my rotors keep getting bent?
If the rotor is a Shimano IceTech, which is an steel and aluminum sandwich, it's not going to take much at all. If it's a solid steel rotor, you may need to bend it a little beyond true so that it springs back in to a more true position.
Jump to the 3min mark or so, if you're impatient -
Last edited by WhyFi; 05-05-22 at 07:56 AM.
#3875
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