I would guess fine if you don’t notice a change in braking as it’s just fluid moving thru a tube, and the tube doesn’t seem broken, but am curious so would like to hear a wrench’s opinion.
asb308 on
It’ll work right up until it doesn’t. If it was my bike, I’d be getting a new hose installed.
New hoses and fluid are cheap compared to a hospital or dentist visit.
mtbd15 on
Try to round it out with some pliers if it’s really affecting performance. If you don’t notice any difference in braking power don’t worry about it
SneezeBucket on
If it isn’t leaking or blocked … it’s fine.
Gnascher on
I’d ride it (but not send it) until I had a moment to replace it.
Brakes are important. I don’t want a brake line to go “pop” just when I need it most.
Sporadic_Tomato on
It’ll work right up until it doesn’t. A brake hose is designed to bend but you’ve gone beyond that and kinked it. There is now a corner inside that hose which is where pressure will build unevenly and eventually it will likely fail. If it was my bike I would replace it.
Your hydraulic brake works by applying the pressure generated from depressing your brake lever (magnified by the angle) to the fluid which pushes evenly in every direction. The force is multiplied by the piston size in your brake caliper. Normally the hose is designed to handle this pressure but you’ve created a weak point. This ability to handle pressure is why Shimano has two different brake hose varieties for different performance brakes.
Tldr: you’ve wrecked your brake hose. Probably fine to commute with until you can replace it but I personally wouldn’t bet my health on it.
jmp485 on
Given how close it is to the lever and that it is likely running to the front brake caliper, you MAY have enough slack in the line to cut it just past that kink and shorten the run. New barb and olive and you’re GTG. If the new shorter run restricts your handlebar in any way, then you run a new line.
lol_camis on
Not a big deal. Keep an eye on for it getting worse, but I would keep riding that at least until I had to disconnect my brake line for an unrelated reason
Pristine_Victory_495 on
Not a huge deal. have the hose replaced. is pretty affordable and shouldn’t take long.
No0O0obstah on
I agree with the core idea that one should not take riskswith breaks, and this is not that expensive to fix.
What I don’t agree is all the “it will break when you most need it” or “it will work untill it won’t “. Cause I don’t think anyone here commenting have any actual experience on how this would effect the integrity or how they are designed to habndle this kind of deformation. I don’t. My common sense says it weakens and my common sense says better not risk it. However I have no idea if this is actually safe or not. Weaker doesn’t mean it will fail.
lkngro5043 on
This is one of those situations where you don’t want to find out if the component is actually compromised. Fix it asap.
Brake hoses are inexpensive. A shop should be able to fix it for $20-50USD in an hour or so. Or you could fix it for $5-10USD in the amount of time it’ll take you to sip a beer in your garage.
Baldovsky on
Cutting the hose to the point where it is good and small bleed should be enough. No need to replace it.
Ticonderoga_Dixon on
I had a low side acorn related crash a few days ago which spun my brakes around and resulted in a kink very similar to yours. Long story I had enough hose to cut the kinked part. After a bleed the brake feels better than new.
14 Comments
Blurry pics, lad.
I would guess fine if you don’t notice a change in braking as it’s just fluid moving thru a tube, and the tube doesn’t seem broken, but am curious so would like to hear a wrench’s opinion.
It’ll work right up until it doesn’t. If it was my bike, I’d be getting a new hose installed.
New hoses and fluid are cheap compared to a hospital or dentist visit.
Try to round it out with some pliers if it’s really affecting performance. If you don’t notice any difference in braking power don’t worry about it
If it isn’t leaking or blocked … it’s fine.
I’d ride it (but not send it) until I had a moment to replace it.
Brakes are important. I don’t want a brake line to go “pop” just when I need it most.
It’ll work right up until it doesn’t. A brake hose is designed to bend but you’ve gone beyond that and kinked it. There is now a corner inside that hose which is where pressure will build unevenly and eventually it will likely fail. If it was my bike I would replace it.
Your hydraulic brake works by applying the pressure generated from depressing your brake lever (magnified by the angle) to the fluid which pushes evenly in every direction. The force is multiplied by the piston size in your brake caliper. Normally the hose is designed to handle this pressure but you’ve created a weak point. This ability to handle pressure is why Shimano has two different brake hose varieties for different performance brakes.
Tldr: you’ve wrecked your brake hose. Probably fine to commute with until you can replace it but I personally wouldn’t bet my health on it.
Given how close it is to the lever and that it is likely running to the front brake caliper, you MAY have enough slack in the line to cut it just past that kink and shorten the run. New barb and olive and you’re GTG. If the new shorter run restricts your handlebar in any way, then you run a new line.
Not a big deal. Keep an eye on for it getting worse, but I would keep riding that at least until I had to disconnect my brake line for an unrelated reason
Not a huge deal. have the hose replaced. is pretty affordable and shouldn’t take long.
I agree with the core idea that one should not take riskswith breaks, and this is not that expensive to fix.
What I don’t agree is all the “it will break when you most need it” or “it will work untill it won’t “. Cause I don’t think anyone here commenting have any actual experience on how this would effect the integrity or how they are designed to habndle this kind of deformation. I don’t. My common sense says it weakens and my common sense says better not risk it. However I have no idea if this is actually safe or not. Weaker doesn’t mean it will fail.
This is one of those situations where you don’t want to find out if the component is actually compromised. Fix it asap.
Brake hoses are inexpensive. A shop should be able to fix it for $20-50USD in an hour or so. Or you could fix it for $5-10USD in the amount of time it’ll take you to sip a beer in your garage.
Cutting the hose to the point where it is good and small bleed should be enough. No need to replace it.
I had a low side acorn related crash a few days ago which spun my brakes around and resulted in a kink very similar to yours. Long story I had enough hose to cut the kinked part. After a bleed the brake feels better than new.