Is this tire worth patching?
#1
Newbie
Thread Starter
Join Date: Mar 2022
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Is this tire worth patching?
I'm not sure how exactly this happened. I could not see any debris on the road that could have caused this. I might have over-inflated the tire. The max is 109PSI and I think I had it at close to 120PSI. The tire size is 700x25C. What do you think? The cut on the tube is is less than half of the cut on the tire. The tire is a Michelin Pro 4
Anyway, my main question is can I patch this? Or is the cut too big and the tire is compromised? Thank you!
Forum Rules don't allow me to attach photos. I added the photos in my profile. Please click on my username and you should see my album.
Anyway, my main question is can I patch this? Or is the cut too big and the tire is compromised? Thank you!
Forum Rules don't allow me to attach photos. I added the photos in my profile. Please click on my username and you should see my album.
Last edited by CoolRunnings; 03-18-22 at 11:57 AM.
#2
Senior Member
Join Date: Feb 2017
Location: Hollister, CA (not the surf town)
Posts: 1,755
Bikes: 2019 Specialized Roubaix Comp Di2, 2009 Roubaix, early 90's Giant Iguana
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 648 Post(s)
Liked 1,584 Times
in
566 Posts
120PSI? Not sure what size tire or how heavy you are, but that sounds insanely high to me. Looking at the picture, I would not use that tire.
Likes For Ogsarg:
#3
Newbie
Thread Starter
Join Date: Mar 2022
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
The ties size is 700x25C. I'm 160 pounds. I just checked again. The tire rating is 73-109PSI. My other tire max rating is 120PSI. So, I brought both to around 120PSI.
My main question is whether the cut is too big to be patched.
My main question is whether the cut is too big to be patched.
Last edited by CoolRunnings; 03-18-22 at 12:01 PM.
#4
Senior Member
Join Date: Jan 2010
Location: TC, MN
Posts: 39,520
Bikes: R3 Disc, Haanjo
Mentioned: 354 Post(s)
Tagged: 1 Thread(s)
Quoted: 20810 Post(s)
Liked 9,456 Times
in
4,672 Posts
A) That tire is toast.
B) Max pressure is almost never the answer. Unless you're riding this bike in a velodrome, you'll want to back off the pressure considerably.
B) Max pressure is almost never the answer. Unless you're riding this bike in a velodrome, you'll want to back off the pressure considerably.
Likes For WhyFi:
#5
Senior Member
Join Date: Jan 2010
Location: TC, MN
Posts: 39,520
Bikes: R3 Disc, Haanjo
Mentioned: 354 Post(s)
Tagged: 1 Thread(s)
Quoted: 20810 Post(s)
Liked 9,456 Times
in
4,672 Posts
For the benefit of other readers -
Likes For WhyFi:
#6
Senior Member
Join Date: Jul 2002
Location: Sacramento, California, USA
Posts: 40,865
Bikes: Specialized Tarmac, Canyon Exceed, Specialized Transition, Ellsworth Roots, Ridley Excalibur
Mentioned: 68 Post(s)
Tagged: 0 Thread(s)
Quoted: 2953 Post(s)
Liked 3,106 Times
in
1,417 Posts
Into the bin.
Likes For caloso:
#7
I eat carbide.
Join Date: Jan 2006
Location: Elgin, IL
Posts: 21,627
Bikes: Lots. Van Dessel and Squid Dealer
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 1326 Post(s)
Liked 1,307 Times
in
560 Posts
chuck it.
__________________
PSIMET Wheels, PSIMET Racing, PSIMET Neutral Race Support, and 11 Jackson Coffee
Podcast - YouTube Channel
Video about PSIMET Wheels
Podcast - YouTube Channel
Video about PSIMET Wheels
Likes For Psimet2001:
#8
Senior Member
Join Date: Mar 2007
Location: SF Bay Area, East bay
Posts: 7,781
Bikes: Miyata 618 GT, Marinoni, Kestral 200 2002 Trek 5200, KHS Flite, Koga Miyata, Schwinn Spitfire 5, Mondia Special, Univega Alpina, Miyata team Ti, Santa Cruz Highball
Mentioned: 54 Post(s)
Tagged: 0 Thread(s)
Quoted: 1644 Post(s)
Liked 2,748 Times
in
1,277 Posts
Its cut across the fibers so you must have caught something. Yes, tire and tube is shot.
Likes For curbtender:
#9
Senior Member
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Posts: 29,593
Bikes: Bottecchia Sprint, GT Timberline 29r, Marin Muirwoods 29er, Trek FX Alpha 7.0
Mentioned: 112 Post(s)
Tagged: 0 Thread(s)
Quoted: 5234 Post(s)
Liked 3,609 Times
in
2,357 Posts
oh well, like fishermen say: "lose one, rig one". sounds like when it happened, you didn't go down. hope it wasn't a long walk
#10
Senior Member
Join Date: Oct 2013
Location: Highlands Ranch, CO
Posts: 1,221
Bikes: '13 Diamondback Hybrid Commuter, '17 Spec Roubaix Di2, '17 Spec Camber 29'er, '19 CDale Topstone Gravel
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 590 Post(s)
Liked 445 Times
in
260 Posts
In general, never use the advertised max pressure the tire is rated for to set your psi. Setting the psi is all about the rider+bike weight and the tire deformation while sitting on the bike. And deformation is your frictional friend by providing a larger contact patch, especially around hard and fast turns, though too much deformation can be your snake-bite nemesis. There's lots of charts out there to help you determine proper psi.
As for the tire, retire it (pun intended).
Last edited by Riveting; 03-18-22 at 02:44 PM.
Likes For Riveting:
#11
I'm good to go!
Join Date: Jul 2017
Location: Mississippi
Posts: 15,347
Bikes: Tarmac Disc Comp Di2 - 2020
Mentioned: 53 Post(s)
Tagged: 0 Thread(s)
Quoted: 6387 Post(s)
Liked 4,982 Times
in
3,430 Posts
If you were out on the road trying to get home, you could boot that tire with just about anything and get home on it. But I wouldn't use that tire with so many cut threads in the casing for anything longer than it takes to acquire a new tire.
A boot is just something you put between the tube and the hole. It can be a folded up 1 dollar bill, though 100 dollar bills are more impressive when you tell your friends. Or it can be a piece of tuff fabric like sail cloth or a piece of a plastic bottle you found on the side of the road and cut to shape.
In all cases, I'd consider a boot a very temporary repair. Mostly just for the purpose of getting me home or somewhere to get additional help.
A boot is just something you put between the tube and the hole. It can be a folded up 1 dollar bill, though 100 dollar bills are more impressive when you tell your friends. Or it can be a piece of tuff fabric like sail cloth or a piece of a plastic bottle you found on the side of the road and cut to shape.
In all cases, I'd consider a boot a very temporary repair. Mostly just for the purpose of getting me home or somewhere to get additional help.
#12
Senior Member
Join Date: Jun 2002
Location: San Jose, CA
Posts: 3,751
Bikes: Too many bikes, too little time to ride
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 460 Post(s)
Liked 491 Times
in
338 Posts
As someone who is relatively risk tolerant and has attempted this numerous times in the past, I have to say this tire is not worth patching (unless it's a roadside emergency situation).
Likes For tFUnK:
#13
Should Be More Popular
Join Date: Dec 2007
Location: Malvern, PA (20 miles West of Philly)
Posts: 43,268
Bikes: 1986 Alpine (steel road bike), 2009 Ti Habenero, 2013 Specialized Roubaix
Mentioned: 561 Post(s)
Tagged: 2 Thread(s)
Quoted: 22770 Post(s)
Liked 9,169 Times
in
4,253 Posts
Likes For datlas:
#14
Senior Member
Join Date: Sep 2017
Location: Upstate SC
Posts: 1,742
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 844 Post(s)
Liked 1,701 Times
in
801 Posts
Maximum pressure means the limit of what the tire will hold, not what it should be inflated to. Tire pressure may actually increase as you ride, especially if the roads are hot.
If your bike said "Max Weight 300 lbs" would you eat until you gained 140 lbs?
If your bike said "Max Weight 300 lbs" would you eat until you gained 140 lbs?
Likes For Bald Paul:
#15
don't try this at home.
Join Date: Jan 2006
Location: N. KY
Posts: 5,991
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 989 Post(s)
Liked 539 Times
in
369 Posts
100 psi means there's 100 pounds of pressure on each square inch! Woah! Think of gluing a patch over that cut and having it hold with all that stress trying to pull the cut open, while you ride over bumps and potholes, too.
The fabric casing is all that keeps the tire from blowing up like a balloon, and a cut interferes with that.
Tyvek scraps
I wrap my spare tube with a piece of tyvek from an overnight envelope. (or an event ride jersey number). It should make a nice boot, bigger and stronger than a dollar bill. I've only had to use dollar bills in the past, the tyvek has been waiting for a cut tire, for a couple of years now.
But the main reason for the tyvek is that tubes often stay in saddle bags for a long time, and abrasion weakens them at the folded edge. I've seen two or three tubes go flat soon after replacing a flat tube, and the cut isn't sharp, it's kind of worn down looking.
Rule of thumb
Big cuts only happen on new tires. Why is that
The fabric casing is all that keeps the tire from blowing up like a balloon, and a cut interferes with that.
Tyvek scraps
I wrap my spare tube with a piece of tyvek from an overnight envelope. (or an event ride jersey number). It should make a nice boot, bigger and stronger than a dollar bill. I've only had to use dollar bills in the past, the tyvek has been waiting for a cut tire, for a couple of years now.
But the main reason for the tyvek is that tubes often stay in saddle bags for a long time, and abrasion weakens them at the folded edge. I've seen two or three tubes go flat soon after replacing a flat tube, and the cut isn't sharp, it's kind of worn down looking.
Rule of thumb
Big cuts only happen on new tires. Why is that
#17
Senior Member
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Posts: 29,593
Bikes: Bottecchia Sprint, GT Timberline 29r, Marin Muirwoods 29er, Trek FX Alpha 7.0
Mentioned: 112 Post(s)
Tagged: 0 Thread(s)
Quoted: 5234 Post(s)
Liked 3,609 Times
in
2,357 Posts
#18
Senior Member
Join Date: Jun 2005
Location: Kentucky
Posts: 2,632
Bikes: 06 Lemond Reno, 98 GT Timberline mtn.bike
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 432 Post(s)
Liked 733 Times
in
454 Posts
As others have said, ditch that tire. BTW-I vary around 150-155 lbs, and have Michelin Pro 4 Service Course 700x25 (actually measure 28 on my rims), and I run them around 80-85 psi without any problems. Actually get a more comfortable ride and if anything, feels faster at the lower psi. Wouldn't advise running any tire at max pressure.
#19
Senior Member
Join Date: May 2008
Location: Zang's Spur, CO
Posts: 9,089
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 3427 Post(s)
Liked 5,638 Times
in
2,926 Posts
No kidding!
The first massive cut I got was in the sidewall of a nearly new Marathon Supreme, in the sidewall.
Only thing I had for a boot was a piece of old inner tube, which bulged out the side, nearly catching the brake pad, for the 22 miles home.
After that, I bought a pack of the Park TB-2 tire boots.
They are reinforced so they can't stretch/bulge, and have adhesive to keep them in place.
A few years later, I got another massive slice (in the sidewall again).
It was large enough to put my thumb through it, and I was positive no boot would hold.
But since it was a 6 mile walk home, I pulled out the Park boots and gave it my best shot.
Incredibly, the boot worked perfectly and got me home.
The first massive cut I got was in the sidewall of a nearly new Marathon Supreme, in the sidewall.
Only thing I had for a boot was a piece of old inner tube, which bulged out the side, nearly catching the brake pad, for the 22 miles home.
After that, I bought a pack of the Park TB-2 tire boots.
They are reinforced so they can't stretch/bulge, and have adhesive to keep them in place.
A few years later, I got another massive slice (in the sidewall again).
It was large enough to put my thumb through it, and I was positive no boot would hold.
But since it was a 6 mile walk home, I pulled out the Park boots and gave it my best shot.
Incredibly, the boot worked perfectly and got me home.
Likes For Shimagnolo:
#20
Advocatus Diaboli
Join Date: Feb 2015
Location: Wherever I am
Posts: 8,721
Bikes: Merlin Cyrene, Nashbar steel CX
Mentioned: 14 Post(s)
Tagged: 1 Thread(s)
Quoted: 4821 Post(s)
Liked 1,557 Times
in
1,021 Posts
#21
Senior Member
Join Date: Aug 2006
Location: Valley Forge: Birthplace of Freedom
Posts: 1,301
Bikes: Novara Safari, CAAD9, WABI Classic, WABI Thunder
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 366 Post(s)
Liked 459 Times
in
240 Posts
You might get a tire boot, or use a dollar bill in the future. Won't make the tire safe but might allow you to ride home.
__________________
Be watchful, stand firm in the faith, act like men, be strong. Let all that you do be done in love.
Be watchful, stand firm in the faith, act like men, be strong. Let all that you do be done in love.