My c. 2020 Ultegra (front right) shifter/brake assembly is misbehaving in colder weather it seems.
First, in cooler weather I have been finding the inner shifter fails to engage when shifting to a higher gear. I have to swing it sometimes several times before it engages.
Second, this morning it was just below freezing, and I discovered that my rear (disc) brake was extremely hard to compress. Didn't want to stop me.
What's the deal? Any suggestions? Thanks.
My c. 2020 Ultegra (front right) shifter/brake assembly is misbehaving in colder weather it seems.This sounds to me like two separate problems. The shifting problem could be from crud between the inner and outer cables But it could be just as easily a worn chain or chain ring,
First, in cooler weather I have been finding the inner shifter fails to engage when shifting to a higher gear. I have to swing it sometimes several times before it engages.
Second, this morning it was just below freezing, and I discovered that my rear (disc) brake was extremely hard to compress. Didn't want to stop me.
What's the deal? Any suggestions? Thanks.
This sounds to me like two separate problems. The shifting problem could be from crud between the inner and outer cables But it could be just as easily a worn chain or chain ring,oil. DO NOT use car-type braking fluid since Shimano seals are not designed for it. Be sure to read the Shimano bleeding manual. I don't see how you could get it wrong but stranger things have happened.
But the brakes are probably hydraulic and any water in the line can form ice that will block that brake entirely.
To fix it I would recommend replacing the shift cables inner and outer. For the braking problem I would say that you need to entirely bleed the brake giving you the problem. Shimano is very easy to bleed and all you have to do is use a Shimano mineral
On Tuesday, November 28, 2023 at 11:37:35 AM UTC-8, Tom Kunich wrote:mineral oil. DO NOT use car-type braking fluid since Shimano seals are not designed for it. Be sure to read the Shimano bleeding manual. I don't see how you could get it wrong but stranger things have happened.
This sounds to me like two separate problems. The shifting problem could be from crud between the inner and outer cables But it could be just as easily a worn chain or chain ring,
But the brakes are probably hydraulic and any water in the line can form ice that will block that brake entirely.
To fix it I would recommend replacing the shift cables inner and outer. For the braking problem I would say that you need to entirely bleed the brake giving you the problem. Shimano is very easy to bleed and all you have to do is use a Shimano
Thanks gentlemen. Chain is good, chainring is fine. Brakes are not hydraulic. Crud theory is active.
On Tuesday, November 28, 2023 at 2:26:57 PM UTC-6, Jim Flom wrote:mineral oil. DO NOT use car-type braking fluid since Shimano seals are not designed for it. Be sure to read the Shimano bleeding manual. I don't see how you could get it wrong but stranger things have happened.
On Tuesday, November 28, 2023 at 11:37:35 AM UTC-8, Tom Kunich wrote:
This sounds to me like two separate problems. The shifting problem could be from crud between the inner and outer cables But it could be just as easily a worn chain or chain ring,
But the brakes are probably hydraulic and any water in the line can form ice that will block that brake entirely.
To fix it I would recommend replacing the shift cables inner and outer. For the braking problem I would say that you need to entirely bleed the brake giving you the problem. Shimano is very easy to bleed and all you have to do is use a Shimano
the exact same symptoms. Once it warms up then the bike shifts fine. The worst-case scenario is the I simply have trigger the shifter a couple times to upshift. It does not bother the downshifting.Thanks gentlemen. Chain is good, chainring is fine. Brakes are not hydraulic. Crud theory is active.I have Shimano 6800 and on real cold day with temps at 30 degrees Fahrenheit they can do the exact same thing. I think the grease gets a little slow. You need to watch for the cable fray that happens in at the head in the shifter too. This can cause
Deacon Mark
On Tuesday, November 28, 2023 at 3:02:49 p.m. UTC-6, Mark Cleary wrote:mineral oil. DO NOT use car-type braking fluid since Shimano seals are not designed for it. Be sure to read the Shimano bleeding manual. I don't see how you could get it wrong but stranger things have happened.
On Tuesday, November 28, 2023 at 2:26:57 PM UTC-6, Jim Flom wrote:
On Tuesday, November 28, 2023 at 11:37:35 AM UTC-8, Tom Kunich wrote: >>>> This sounds to me like two separate problems. The shifting problem could be from crud between the inner and outer cables But it could be just as easily a worn chain or chain ring,
But the brakes are probably hydraulic and any water in the line can form ice that will block that brake entirely.
To fix it I would recommend replacing the shift cables inner and outer. For the braking problem I would say that you need to entirely bleed the brake giving you the problem. Shimano is very easy to bleed and all you have to do is use a Shimano
the exact same symptoms. Once it warms up then the bike shifts fine. The worst-case scenario is the I simply have trigger the shifter a couple times to upshift. It does not bother the downshifting.Thanks gentlemen. Chain is good, chainring is fine. Brakes are not hydraulic. Crud theory is active.I have Shimano 6800 and on real cold day with temps at 30 degrees Fahrenheit they can do the exact same thing. I think the grease gets a little slow. You need to watch for the cable fray that happens in at the head in the shifter too. This can cause
Deacon Mark
In really cold weather I don't think much beats old school friction thumbshifters. I have Deore friction?\/index rear shifter on one of my winter bikes and I can shift that even with thick mittens. No worries about a cabl fraying either.
Heavy condensation can totally freeze up a shifter or even brake cable (or freehub or freewheel). That can happen simply by moving a bicycle from a warm building out into deep cold.
Cheers
On Tuesday, November 28, 2023 at 3:02:49 p.m. UTC-6, Mark Cleary wrote:
On Tuesday, November 28, 2023 at 2:26:57 PM UTC-6, Jim Flom wrote:
On Tuesday, November 28, 2023 at 11:37:35 AM UTC-8, Tom Kunich wrote: >>>> This sounds to me like two separate problems. The shifting problemI have Shimano 6800 and on real cold day with temps at 30 degrees
could be from crud between the inner and outer cables But it could beThanks gentlemen. Chain is good, chainring is fine. Brakes are not
just as easily a worn chain or chain ring,
But the brakes are probably hydraulic and any water in the line can
form ice that will block that brake entirely.
To fix it I would recommend replacing the shift cables inner and
outer. For the braking problem I would say that you need to entirely
bleed the brake giving you the problem. Shimano is very easy to bleed
and all you have to do is use a Shimano mineral oil. DO NOT use
car-type braking fluid since Shimano seals are not designed for it. Be >>>> sure to read the Shimano bleeding manual. I don't see how you could
get it wrong but stranger things have happened.
hydraulic. Crud theory is active.
Fahrenheit they can do the exact same thing. I think the grease gets a
little slow. You need to watch for the cable fray that happens in at the
head in the shifter too. This can cause the exact same symptoms. Once it
warms up then the bike shifts fine. The worst-case scenario is the I
simply have trigger the shifter a couple times to upshift. It does not
bother the downshifting.
Deacon Mark
In really cold weather I don't think much beats old school friction thumbshifters. I have Deore friction?\/index rear shifter on one of my
winter bikes and I can shift that even with thick mittens. No worries
about a cabl fraying either.
Heavy condensation can totally freeze up a shifter or even brake cable
(or freehub or freewheel). That can happen simply by moving a bicycle
from a warm building out into deep cold.
Cheers
Heavy condensation can totally freeze up a shifter or even brake cable (or freehub or freewheel). That can happen simply by moving a bicycle from a warm building out into deep cold.
I have Shimano 6800 and on real cold day with temps at 30 degrees Fahrenheit they can do the exact same thing. I think the grease gets a little slow. You need to watch for the cable fray that happens in at the head in the shifter too. This can causethe exact same symptoms. Once it warms up then the bike shifts fine. The worst-case scenario is the I simply have trigger the shifter a couple times to upshift. It does not bother the downshifting.
Deacon Mark
On Tuesday, November 28, 2023 at 1:02:49 PM UTC-8, Mark Cleary wrote:
I have Shimano 6800 and on real cold day with temps at 30 degrees
Fahrenheit they can do the exact same thing. I think the grease gets a
little slow. You need to watch for the cable fray that happens in at the
head in the shifter too. This can cause the exact same symptoms. Once it
warms up then the bike shifts fine. The worst-case scenario is the I
simply have trigger the shifter a couple times to upshift. It does not
bother the downshifting.
Deacon Mark
Will check that out. I was skeptical of disk brakes and I am no less skeptical after this cold weather stuff.
On Tuesday, November 28, 2023 at 2:50:16 PM UTC-8, Sir Ridesalot wrote:
Heavy condensation can totally freeze up a shifter or even brake cable (or freehub or freewheel). That can happen simply by moving a bicycle from a warm building out into deep cold.Ah ha! Crazy. You might be onto something.
Doesn’t sound like disks are the issue but cables and possibly the shifter housing. With cable disks callipers are exposed so muck can get in though this doesn’t sound like this happened?
Cable disks are arguably worse of both worlds but I don’t believe this is a
disks problem but a cable one.
Roger Merriman
On Tuesday, November 28, 2023 at 10:13:20 PM UTC-5, Jim Flom wrote:
On Tuesday, November 28, 2023 at 2:50:16 PM UTC-8, Sir Ridesalot wrote:I had a freewheel on my CX bike which froze up during an exceptionally cold race for exactly that reason.
Heavy condensation can totally freeze up a shifter or even brake cable (or freehub or freewheel). That can happen simply by moving a bicycle from a warm building out into deep cold.Ah ha! Crazy. You might be onto something.
On 11/28/2023 4:50 PM, Sir Ridesalot wrote:mineral oil. DO NOT use car-type braking fluid since Shimano seals are not designed for it. Be sure to read the Shimano bleeding manual. I don't see how you could get it wrong but stranger things have happened.
On Tuesday, November 28, 2023 at 3:02:49 p.m. UTC-6, Mark Cleary wrote:
On Tuesday, November 28, 2023 at 2:26:57 PM UTC-6, Jim Flom wrote:
On Tuesday, November 28, 2023 at 11:37:35 AM UTC-8, Tom Kunich wrote: >>>> This sounds to me like two separate problems. The shifting problem could be from crud between the inner and outer cables But it could be just as easily a worn chain or chain ring,
But the brakes are probably hydraulic and any water in the line can form ice that will block that brake entirely.
To fix it I would recommend replacing the shift cables inner and outer. For the braking problem I would say that you need to entirely bleed the brake giving you the problem. Shimano is very easy to bleed and all you have to do is use a Shimano
the exact same symptoms. Once it warms up then the bike shifts fine. The worst-case scenario is the I simply have trigger the shifter a couple times to upshift. It does not bother the downshifting.Thanks gentlemen. Chain is good, chainring is fine. Brakes are not hydraulic. Crud theory is active.I have Shimano 6800 and on real cold day with temps at 30 degrees Fahrenheit they can do the exact same thing. I think the grease gets a little slow. You need to watch for the cable fray that happens in at the head in the shifter too. This can cause
He indicated that he has cable discs. So that is his stopping problem. In bad weather you have to ride more carefully and notice the poor braking of cable discs moreDeacon Mark
In really cold weather I don't think much beats old school friction thumbshifters. I have Deore friction?\/index rear shifter on one of my winter bikes and I can shift that even with thick mittens. No worries about a cabl fraying either.
Heavy condensation can totally freeze up a shifter or even brake cable (or freehub or freewheel). That can happen simply by moving a bicycle from a warm building out into deep cold.
CheersStill, friction or index, some products such as Rock-N-Roll
can be very helpful in extreme cold.
--
Andrew Muzi
a...@yellowjersey.org
Open every day since 1 April, 1971
On Wednesday, November 29, 2023 at 2:31:11 AM UTC-8, Roger Merriman wrote:
Doesn’t sound like disks are the issue but cables and possibly the shifter
housing. With cable disks callipers are exposed so muck can get in though this doesn’t sound like this happened?
Cable disks are arguably worse of both worlds but I don’t believe this is a
disks problem but a cable one.
Roger MerrimanYeah, I'm going to have to dig into that. Really not sold on disk brakes... they get crazy hot on winding descents, and this... I'll take rims over this nonsense.
JF
On Wednesday, November 29, 2023 at 2:31:11 AM UTC-8, Roger Merriman wrote:
Doesn’t sound like disks are the issue but cables and possibly the shifter >> housing. With cable disks callipers are exposed so muck can get in though
this doesn’t sound like this happened?
Cable disks are arguably worse of both worlds but I don’t believe this is a
disks problem but a cable one.
Roger Merriman
Yeah, I'm going to have to dig into that. Really not sold on disk
brakes... they get crazy hot on winding descents, and this... I'll take
rims over this nonsense.
JF
My c. 2020 Ultegra (front right) shifter/brake assembly is misbehaving in colder weather it seems.
First, in cooler weather I have been finding the inner shifter fails to engage when shifting to a higher gear. I have to swing it sometimes several times before it engages.
Second, this morning it was just below freezing, and I discovered that my rear (disc) brake was extremely hard to compress. Didn't want to stop me.
What's the deal? Any suggestions? Thanks.
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