View Full Version : Conti GP5000 TL issue
V1Rotate
06-20-2020, 05:25 AM
Brand new Conti GP5000 tubeless, maybe 110 miles. The bubble is so soft you could likely pinch and pierce it with your fingernail.
soulspinner
06-20-2020, 05:38 AM
ya Im not riding that.
Louis
06-20-2020, 05:42 AM
Is that an "issue" or a sidewall cut due to bad luck?
Think of it this way: you're lucky it didn't blow out when the cut happened.
Robot870
06-20-2020, 08:22 AM
Yikes! Glad your ok!! Just mounted up some Michelin power road TLs......cant wait to see how they go!!
charliedid
06-20-2020, 08:34 AM
Brand new Conti GP5000 tubeless, maybe 110 miles. The bubble is so soft you could likely pinch and pierce it with your fingernail.
Stuff like this sometimes happens with bike tires. A little context would help, I guess you were JRA? What's the story?
oldpotatoe
06-20-2020, 09:05 AM
Brand new Conti GP5000 tubeless, maybe 110 miles. The bubble is so soft you could likely pinch and pierce it with your fingernail.
The issue isn't the tire, the issue is you went over something that cut the sidewall..:eek:It's done..bad luck for sure.
V1Rotate
06-20-2020, 10:49 AM
Context: Mounted them up, road around the neighborhood for 10' to slosh the sealant around, then next day put 104 miles on them in one ride on pure nice pavement and then noticed this. Yeah I agree that I'm fortunate it didn't blow out and got me home.. definitely curious how I could have possibly run something over that cut that far up the sidewall and not notice it (definitely not saying it's not possible!).
It's been removed and replaced.. I agree it looks like a sidewall cut in hindsight but I definitely didn't run over anything that I remember that could have reached that far around the tire
V1Rotate
06-20-2020, 10:58 AM
Also for reference the cut/hole stops midway up the "9". The line/shadow you see above that is extra rubber like what comes on a new tire from the form/mold
davidb
06-20-2020, 12:19 PM
Just some things to consider. Did someone cut the packing strap with scissors and nick the tire, starting the cut/tear. It could be a pot hole strike. Did the strap get yanked on to remove? All stuff I have seen before.
robt57
06-20-2020, 12:45 PM
Do you remember a gravel chunk ping or launch pop. That is what that looks like may have precipitated that. I have hit a smallish piece of gravel leaned in turns and that is exactly what it looked like after.
Due respect, title is mis-leading kinda.. IMO.
Not often, but boy oh boy loosing a brand new good tire on first ride sure is not fun or feels anything but craapeee.
Once I lost a tubular in 8 miles. Nice little glass bolder meteoritte about 4mm the sealant could only hold the hole to about 40 PSI.
Lost many more clinchers, usually a Conti too. Is that because it is mostly what I have run, or they in fact have scant sidewalls? I say yes to both. Yet I still use them and in fact last two purchased set, one 25mm and one 28mm TLs. TL sidewall prolly a lot more durable...
EDIT: only now noticed yours is a TL. OUCH ET [phone home] for sure, sympathies....
Mark McM
06-20-2020, 12:54 PM
I agree it looks like a sidewall cut in hindsight but I definitely didn't run over anything that I remember that could have reached that far around the tire
I sometimes get tire slashes like that, it's not that uncommon. Even when my tires don't get sidewall slashes, I often found scuffs on my sidewalls that go up that far. I don't know if that happens when the tires sink into sand or gravel, or if it happens when the bike/tire is leaned over in corners, or maybe it happens when you it a 3 dimensional object (maybe a bent screw or piece of angled metal, or run over the edge of a sharp rock), but over the miles the sidewalls definitely get some wear/scuffing/scratching, and the occasional cut.
fmradio516
06-20-2020, 01:50 PM
same thing happened to my GP5k non TL after 30 miles. Just unlucky i guess.
robt57
06-20-2020, 02:21 PM
I watced my wife do that in front of me. She got on the bike and rode between two curb stops ever so lightly touching the sidewall of a GP4k on the edge of the curb stop. She got cheaper tires next and does not know the difference anyway. I choose something without a paper side wall for her. But the TL you'd think being tubeless does not have the GP3-4 thin thin sidewalls.
Tony T
06-20-2020, 02:31 PM
Read this this morning, went for a nice 50 miler, ¾ way through, I slow and coast to the side of the road to take a piss, rolling over gravel, and POW, blowout as a sharp stone sliced my sidewall. Should have known better, but really had to take that piss :) Had Park a TB-2, so quick fix (and now to change that tire)
I've been hearing a lot of bad things about the durability of 5K tires from pro wrenches..
robt57
06-20-2020, 03:21 PM
I've been hearing a lot of bad things about the durability of 5K tires from pro wrenches..
Me and every one else [nearly] been hearing that with 3s, 4s, now presumably 5s. Never stopped me from buying them somehow. ;)
Having mounted up my first 5 both tubeless and with latex, I wil find out the truth a user here told me that they ride a ton better than the 4s.
I have lost as many 3/4s to sidewall incursions as wearing them down al the way. But I usually pull after the second flat figuring the thread thickness is thinner than a new one, rears anyway.
djg21
06-20-2020, 03:49 PM
I've been hearing a lot of bad things about the durability of 5K tires from pro wrenches..
I’ve used them for two seasons. I’ve never had a flat. I wore out one set and replaced them. Where I am, pavement is optional. I ride 28c tires on HED Belgium+ rims. I have nothing but good things to say about the Contis.
shamsixnine
06-20-2020, 04:02 PM
I place 5s for firs time early spring and the rear just got cut up real quick. Never had that with the 4s on same routes. I think there is an individual psi sweet spot that you need to find with psi to get best performance/durability with contis. I haven't found mine with the 5s yet.
robt57
06-20-2020, 04:09 PM
early spring and the rear just got cut up real quick. Never had that with the 4s on same routes.
That time of year I wipe road tires with ammonia before rides. Helps keep the shards and flints at bay.
Fresh fresh tires sure seem to be stickier and pick up stuff that winds up getting pushed thru. I like them a year on the wall better myself.
Having said that, my 5s are new new new and promise some nirvana supposedly. ;) No one year on the wall for these, rolling them the day that they landed. ;)
charliedid
06-20-2020, 07:45 PM
That time of year I wipe road tires with ammonia before rides. Helps keep the shards and flints at bay.
Fresh fresh tires sure seem to be stickier and pick up stuff that winds up getting pushed thru. I like them a year on the wall better myself.
Having said that, my 5s are new new new and promise some nirvana supposedly. ;) No one year on the wall for these, rolling them the day that they landed. ;)
What sort of witchcraft you slinging here? ;-)
Do you wave batwing and eye of newt over the tires as well?
Preposterous I tall ya.
m_sasso
06-21-2020, 03:54 AM
That time of year I wipe road tires with ammonia before rides. Helps keep the shards and flints at bay.
What sort of with craft you slinging here? ;-)
Do you wave batwing and eye of newt over the tires as well?
Preposterous I tall ya.
Made me laugh!
Yea, how long of rolls of tin foil do you prescribe?
Louis
06-21-2020, 04:16 AM
Yea, how long of rolls of tin foil do you prescribe?
Depends on how many helmets need to be treated:
https://lh3.googleusercontent.com/proxy/mvHnJyxo38JOsYiLfPenLlIjfRPJLXYJxsx7GhukrcEOencsgH dW1Khgf_c4fu0_lqVRw_8LMM7azZTVQU1oCSquxhri5AMxTeZs ODx0SaP2RM2Ama7SPA9BkjoSEmasz9PckMZgeidiDH-q_W_8FdY
Monsieur Toast
06-21-2020, 08:36 AM
I somewhat apprehensively settled on a set of GP5s clinchers for my new 25mm H+ Archetypes. Remembering all the bad things I'd heard about GP4s ... while riding on them uneventfully for multiple seasons.
Now that I've got over 500 miles on the GP5s without issue, I'm expecting a double flat later today. Thanks for giving me the chance to jinx myself.
Black Dog
06-21-2020, 08:52 AM
I think that we forget that tires like the GP5000 are high performance race tires and as such are going to be inherently fragile. But we ride them around full time. I am as guilty of this as anyone, but they sure do ride so very nicely.
Monsieur Toast
06-21-2020, 09:45 AM
I somewhat apprehensively settled on a set of GP5s clinchers for my new 25mm H+ Archetypes. Remembering all the bad things I'd heard about GP4s ... while riding on them uneventfully for multiple seasons.
Now that I've got over 500 miles on the GP5s without issue, I'm expecting a double flat later today. Thanks for giving me the chance to jinx myself.
Ayup, just went to grab my bike for a ride and the rear tire was flat. First goathead of the season. Thanks, saying things out loud.
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