Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Do you replace your rear tire because it starts to square off?

Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Do you replace your rear tire because it starts to square off?

Old 03-05-21, 05:57 PM
  #26  
Sy Reene
Advocatus Diaboli
 
Sy Reene's Avatar
 
Join Date: Feb 2015
Location: Wherever I am
Posts: 7,314

Bikes: Merlin Cyrene, Nashbar steel CX

Mentioned: 11 Post(s)
Tagged: 1 Thread(s)
Quoted: 3893 Post(s)
Liked 957 Times in 640 Posts
Originally Posted by Lrdchaos View Post
I have a set of gp5000s with roughly 2800 miles on them. The rear tire has pretty much square off and has a flatter spot in the middle of the entire tire. There are no rips, tears or punctures. I was hoping to make past winter, but is it worth replacing now?
Put a dollar amount on it and then decide. Eg. you paid $40 for the tire, you hope for and could probably get 500 more miles which would bring it to 3300 miles. You've already gotten about $34 worth of value out of the $40 tire. Is the $6 a concern? ... that kinda thing
Sy Reene is offline  
Likes For Sy Reene:
Old 03-05-21, 06:16 PM
  #27  
base2 
Random Internet Person.
 
base2's Avatar
 
Join Date: Jun 2015
Location: Pacific Northwest
Posts: 1,670

Bikes: 5 good ones, and the occasional project.

Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 859 Post(s)
Liked 446 Times in 276 Posts
Originally Posted by Dean V View Post
Squared off tyres on the front do not handle very well.
Also more likely to puncture which is less desirable on the front.
Well, the flat spot in the center is exactly as wide as the contact patch of a non-used tire. I don't know that as far as handling is concerned it would make any real difference being that it's made of rubber & held up by soft, squishy, compressible air. It'd be no different than leaving the front tire alone to age, dry out, & wear out for years through out however many new & fresh rear tire replacements. All tires wear.

Since it's the front, it also carries less weight, so the risk of a sharp bit of debris causing puncture is already low. The already low risk is unlikely to be likely be terribly increased by an amount that matters. But the extra tread thickness of the tire now on the rear means a bit of glass or whatever causing a puncture is much less likely.

Rotating tires spreads the wear around evenly & keeps the average age of tires on a bike much newer. Much like how is done on cars. A set is a set is a set.

I've lost count of how many tires have a flat center & broad sharp shoulders. It seems to me that if it negatively affected handling there would be "front" & "rear" only variants with different profiles commonly available.

Last edited by base2; 03-05-21 at 07:01 PM.
base2 is offline  
Old 03-05-21, 07:40 PM
  #28  
WhyFi
Senior Member
 
WhyFi's Avatar
 
Join Date: Jan 2010
Location: TC, MN
Posts: 35,411

Bikes: R3 Disc, Haanjo

Mentioned: 346 Post(s)
Tagged: 1 Thread(s)
Quoted: 17325 Post(s)
Liked 6,029 Times in 3,116 Posts
Originally Posted by Sy Reene View Post
Put a dollar amount on it and then decide. Eg. you paid $40 for the tire, you hope for and could probably get 500 more miles which would bring it to 3300 miles. You've already gotten about $34 worth of value out of the $40 tire. Is the $6 a concern? ... that kinda thing
Yeah, except that he could get way more than 500 more miles out of it. And then the other question is: what's the downside? He's slightly more prone to flat? Big whoop. Ride it.
WhyFi is offline  
Likes For WhyFi:
Old 03-05-21, 08:05 PM
  #29  
Dean V
Senior Member
 
Join Date: Oct 2009
Posts: 2,787
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 1028 Post(s)
Likes: 0
Liked 216 Times in 128 Posts
Originally Posted by base2 View Post
Well, the flat spot in the center is exactly as wide as the contact patch of a non-used tire. I don't know that as far as handling is concerned it would make any real difference being that it's made of rubber & held up by soft, squishy, compressible air. It'd be no different than leaving the front tire alone to age, dry out, & wear out for years through out however many new & fresh rear tire replacements. All tires wear.

Since it's the front, it also carries less weight, so the risk of a sharp bit of debris causing puncture is already low. The already low risk is unlikely to be likely be terribly increased by an amount that matters. But the extra tread thickness of the tire now on the rear means a bit of glass or whatever causing a puncture is much less likely.

Rotating tires spreads the wear around evenly & keeps the average age of tires on a bike much newer. Much like how is done on cars. A set is a set is a set.

I've lost count of how many tires have a flat center & broad sharp shoulders. It seems to me that if it negatively affected handling there would be "front" & "rear" only variants with different profiles commonly available.
I know it effects the handling because I have done it and it was definitely noticeable.
Just makes the bike feel a bit weird on the initial turn in.
Nothing that is hard to manage but not right and for me I would rather pay the extra dollars to have a tyre there that behaved as it should.
Dean V is offline  
Likes For Dean V:
Old 03-05-21, 08:29 PM
  #30  
MoAlpha
• —
 
Join Date: Jun 2015
Location: Land of Pleasant Living
Posts: 8,673

Bikes: Shmikes

Mentioned: 53 Post(s)
Tagged: 0 Thread(s)
Quoted: 6890 Post(s)
Liked 3,370 Times in 1,833 Posts
Originally Posted by datlas View Post
No. What about the wear indicators?? The little dimples. If they are worn it's time to think about replacement.
This.

I have over 8000 (with 3 zeros) real American miles on my GP5000s and the dimples are still visible on the rear.
MoAlpha is offline  
Likes For MoAlpha:
Old 03-05-21, 09:34 PM
  #31  
Sy Reene
Advocatus Diaboli
 
Sy Reene's Avatar
 
Join Date: Feb 2015
Location: Wherever I am
Posts: 7,314

Bikes: Merlin Cyrene, Nashbar steel CX

Mentioned: 11 Post(s)
Tagged: 1 Thread(s)
Quoted: 3893 Post(s)
Liked 957 Times in 640 Posts
Originally Posted by keithdunlop View Post
That's always when I replace tires - I usually get around 2,000 miles on the GP5000s.
Originally Posted by WhyFi View Post
Yeah, except that he could get way more than 500 more miles out of it. And then the other question is: what's the downside? He's slightly more prone to flat? Big whoop. Ride it.
Originally Posted by Dean V View Post
I know it effects the handling because I have done it and it was definitely noticeable.
Just makes the bike feel a bit weird on the initial turn in.
Nothing that is hard to manage but not right and for me I would rather pay the extra dollars to have a tyre there that behaved as it should.
Originally Posted by MoAlpha View Post
This.

I have over 8000 (with 3 zeros) real American miles on my GP5000s and the dimples are still visible on the rear.
So.. consensus is there is no consensus and suggestions are all over the map. OP: Do what you're comfortable doing.
Sy Reene is offline  
Old 03-05-21, 10:57 PM
  #32  
spelger
Senior Member
 
spelger's Avatar
 
Join Date: Jul 2015
Location: reno, nv
Posts: 1,031

Bikes: yes, i have one

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 499 Post(s)
Liked 471 Times in 278 Posts
Originally Posted by base2 View Post
Now would be a good time to swap it to the front.
you should always put your best foot forward.
spelger is offline  
Likes For spelger:
Old 03-06-21, 08:16 AM
  #33  
WhyFi
Senior Member
 
WhyFi's Avatar
 
Join Date: Jan 2010
Location: TC, MN
Posts: 35,411

Bikes: R3 Disc, Haanjo

Mentioned: 346 Post(s)
Tagged: 1 Thread(s)
Quoted: 17325 Post(s)
Liked 6,029 Times in 3,116 Posts
Originally Posted by Sy Reene View Post
So.. consensus is there is no consensus and suggestions are all over the map. OP: Do what you're comfortable doing.
Uh, one of those quotes is completely unqualified (not explaining why they replace as soon as it starts to show signs of squaring off) and another isn't addressing wear per se, but rather the suggestion of putting a slightly squared-off tire on the front wheel in an effort to balance wear (yeah, I wouldn't do that, either).

Not only are the wear indicators there for a reason, but you can bet that they're a slightly conservative gauge. In terms of wear, unless the tire is getting beat up enough to make it significantly more flat prone, there's no reason to not ride to the bottom of the indicators, at the very least. After that, some are comfortable to continue riding, keeping a close eye on the tread, until punctures threaten to become problematic or cords start showing through.
WhyFi is offline  
Likes For WhyFi:
Old 03-06-21, 08:27 AM
  #34  
Nachoman
well hello there
 
Nachoman's Avatar
 
Join Date: May 2005
Location: Point Loma, CA
Posts: 15,256

Bikes: Bill Holland (Road-Ti), Fuji Roubaix Pro (back-up), Bike Friday (folder), Co-Motion (tandem) & Trek 750 (hybrid)

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 449 Post(s)
Liked 207 Times in 133 Posts
If I see cord, I replace. Or if it's worn enough to cause continued flatting, I replace.
__________________
.
.

Two wheels good. Four wheels bad.
Nachoman is offline  
Likes For Nachoman:
Old 03-06-21, 08:34 AM
  #35  
easyupbug 
Senior Member
 
Join Date: Jan 2013
Posts: 1,741

Bikes: too many sparkly Italians, some sweet Americans and a couple interesting Japanese

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 302 Post(s)
Liked 167 Times in 124 Posts
Wow, tire rotation. 70 years in Southern AZ has taught and reinforced many times (everything has thorns/spines) that even I can bring a blown rear tire to a safe stop. Loosing steering control with a blown front tire is asking for an ugly finish. Best tire on front.
easyupbug is offline  
Likes For easyupbug:
Old 03-06-21, 08:47 AM
  #36  
MoAlpha
• —
 
Join Date: Jun 2015
Location: Land of Pleasant Living
Posts: 8,673

Bikes: Shmikes

Mentioned: 53 Post(s)
Tagged: 0 Thread(s)
Quoted: 6890 Post(s)
Liked 3,370 Times in 1,833 Posts
Originally Posted by WhyFi View Post
Uh, one of those quotes is completely unqualified (not explaining why they replace as soon as it starts to show signs of squaring off) and another isn't addressing wear per se, but rather the suggestion of putting a slightly squared-off tire on the front wheel in an effort to balance wear (yeah, I wouldn't do that, either).

Not only are the wear indicators there for a reason, but you can bet that they're a slightly conservative gauge. In terms of wear, unless the tire is getting beat up enough to make it significantly more flat prone, there's no reason to not ride to the bottom of the indicators, at the very least. After that, some are comfortable to continue riding, keeping a close eye on the tread, until punctures threaten to become problematic or cords start showing through.
And to amplify my very valuable earlier post, I would love to replace my tires (new —> front —> rear) because I do think the handling is affected a little by squaring off, but I am too cheap and greenoid.
MoAlpha is offline  
Old 03-06-21, 08:59 AM
  #37  
Racing Dan
Senior Member
 
Racing Dan's Avatar
 
Join Date: Aug 2015
Posts: 1,887
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 1091 Post(s)
Liked 185 Times in 127 Posts
It sure doesnt look very square. Id ride it a lot further before replacing. There are wear indicators in the thread tho. If unsure just stick to that. A reasonable approach is to move the front tyre to the rear when the rear wears out and put un a fresh tyre in the front.
Racing Dan is offline  
Old 03-06-21, 06:58 PM
  #38  
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Posts: 22,833

Bikes: Several, mostly not name brands.

Mentioned: 134 Post(s)
Tagged: 0 Thread(s)
Quoted: 2681 Post(s)
Liked 1,394 Times in 866 Posts
Originally Posted by base2 View Post
Now would be a good time to swap it to the front.
I've always preferred to put the least worn tire on the front, for better handling. When the rear wears out, I move the front tire to the rear and put the new tire on the front.
JohnDThompson is offline  
Likes For JohnDThompson:
Old 03-06-21, 07:26 PM
  #39  
sfrider 
Asleep at the bars
 
sfrider's Avatar
 
Join Date: May 2006
Location: San Francisco, CA
Posts: 1,698
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 212 Post(s)
Liked 180 Times in 116 Posts
I never rotate tires, but then they also don't really get squared off. Too many long, steep, twisty descents around here that I'm sure dominate any and all tire wear. I just replace whichever tire is worn. If my tires actually got squared off I'd need to experiment and see to what extent it matters.
__________________
"This 7:48 cycling session burned 5933 calories. Speed up recovery by replacing them with a healthy snack." - Whoop

sfrider is offline  
Likes For sfrider:
Old 03-06-21, 10:02 PM
  #40  
Carbonfiberboy 
just another gosling
 
Carbonfiberboy's Avatar
 
Join Date: Feb 2007
Location: Everett, WA
Posts: 17,636

Bikes: CoMo Speedster 2003, Trek 5200, CAAD 9, Fred 2004

Mentioned: 106 Post(s)
Tagged: 0 Thread(s)
Quoted: 3012 Post(s)
Liked 931 Times in 705 Posts
I take a tire off when it starts to flat. For some reason, nearly new tires seldom flat, but squared off ones do. I guess just the rubber being thinner? I've never worn a tire down even close to the casing before it started flatting.
__________________
Results matter
Carbonfiberboy is offline  
Old 03-08-21, 02:46 PM
  #41  
stuff shredman
Member
 
Join Date: Apr 2020
Location: Pasadena, CA
Posts: 48

Bikes: 2020 S-Works Tarmac - Sagan Edition /// 2016 Intense Tracer T275C ///

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Liked 48 Times in 23 Posts
if your tires are starting to square off .... take corners on your bike a lot harder
stuff shredman is offline  
Old 03-08-21, 03:17 PM
  #42  
altondavis2
Senior Member
 
Join Date: Nov 2014
Posts: 266
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked 15 Times in 14 Posts
Is your butt worth more than $50 ????
Sure replace the tire ASAP, You've gotten your value out
of the old tire. It can only get worse.
altondavis2 is offline  
Old 03-08-21, 03:23 PM
  #43  
altondavis2
Senior Member
 
Join Date: Nov 2014
Posts: 266
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked 15 Times in 14 Posts
Riding is a lot more fun when you expect your bike to hold up.

Replace the tires, enjoy the grip.
altondavis2 is offline  
Old 03-08-21, 03:49 PM
  #44  
WhyFi
Senior Member
 
WhyFi's Avatar
 
Join Date: Jan 2010
Location: TC, MN
Posts: 35,411

Bikes: R3 Disc, Haanjo

Mentioned: 346 Post(s)
Tagged: 1 Thread(s)
Quoted: 17325 Post(s)
Liked 6,029 Times in 3,116 Posts
Originally Posted by altondavis2 View Post
Is your butt worth more than $50 ????
Sure replace the tire ASAP, You've gotten your value out
of the old tire. It can only get worse.
So now he's going to die or be grievously injured because of that tire?

If someone is a pretty casual rider that's not putting in too many miles annually, sure - change out a tire after a handful of years when it's looking sad and dried out. If you ride a decent amount, though, making a habit out of throwing away a tire that has potentially thousands of miles left is going to increase your consumables budget considerably.
WhyFi is offline  
Old 03-08-21, 04:16 PM
  #45  
MoAlpha
• —
 
Join Date: Jun 2015
Location: Land of Pleasant Living
Posts: 8,673

Bikes: Shmikes

Mentioned: 53 Post(s)
Tagged: 0 Thread(s)
Quoted: 6890 Post(s)
Liked 3,370 Times in 1,833 Posts
Originally Posted by WhyFi View Post
So now he's going to die or be grievously injured because of that tire?
I don't think that was the implication. Something untoward is going to happen specifically to the OP's butt. Of course, that could be almost anything, but we do know the body part and that's important.
MoAlpha is offline  
Old 03-08-21, 04:24 PM
  #46  
WhyFi
Senior Member
 
WhyFi's Avatar
 
Join Date: Jan 2010
Location: TC, MN
Posts: 35,411

Bikes: R3 Disc, Haanjo

Mentioned: 346 Post(s)
Tagged: 1 Thread(s)
Quoted: 17325 Post(s)
Liked 6,029 Times in 3,116 Posts
Originally Posted by MoAlpha View Post
I don't think that was the implication. Something untoward is going to happen specifically to the OP's butt. Of course, that could be almost anything, but we do know the body part and that's important.
Good call - I have been spanked because my tire had only half of the usable tread remaining.

BRB - gotta go put some more miles on these new tires.
WhyFi is offline  
Old 03-08-21, 04:37 PM
  #47  
Iride01
Hits [ENTER] b4 thinking
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 8,174

Bikes: '20 Tarmac Disc Comp '91, '78 Raleigh Competition GS

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 3218 Post(s)
Liked 1,820 Times in 1,290 Posts
Knock wood, but I've never had a wreck due to tire flat or other tire failure. I'm sure some others have.

As I said previously, I generally run them till the first flat after the cords show. Many times that is the first flat for that tire.
Iride01 is offline  
Old 03-08-21, 05:01 PM
  #48  
bikejrff
Senior Member
 
bikejrff's Avatar
 
Join Date: Aug 2011
Location: Fort Wayne, IN
Posts: 455

Bikes: No. 22 Bicycle Great Divide, Lynskey R260, Salsa Colossal Ti, Litespeed T5, Lynskey Peloton, Bianchi Vigorelli, CAAD 10, Giant FastRoad CoMax 1, C-Dale Quick 1

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
Liked 25 Times in 14 Posts
Originally Posted by datlas View Post
No. What about the wear indicators?? The little dimples. If they are worn it's time to think about replacement.
Yeah, I have started replacing my Conti's when the wear indicators are fading. Used to get 5,000 miles, now I seem to only get 3500-4000. I think it's because I am fatter.
bikejrff is offline  
Old 03-08-21, 05:04 PM
  #49  
altondavis2
Senior Member
 
Join Date: Nov 2014
Posts: 266
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked 15 Times in 14 Posts
Respose to dumb stuff

Originally Posted by WhyFi View Post
So now he's going to die or be grievously injured because of that tire?

If someone is a pretty casual rider that's not putting in too many miles annually, sure - change out a tire after a handful of years when it's looking sad and dried out. If you ride a decent amount, though, making a habit out of throwing away a tire that has potentially thousands of miles left is going to increase your consumables budget considerably.
----------------
Of course he's not going to die, but suffering an incovenience of walking a couple of miles or being late
for a planned activity after riding comuld happen due to worn tires. My time is valuable.
altondavis2 is offline  
Old 03-08-21, 05:04 PM
  #50  
bikejrff
Senior Member
 
bikejrff's Avatar
 
Join Date: Aug 2011
Location: Fort Wayne, IN
Posts: 455

Bikes: No. 22 Bicycle Great Divide, Lynskey R260, Salsa Colossal Ti, Litespeed T5, Lynskey Peloton, Bianchi Vigorelli, CAAD 10, Giant FastRoad CoMax 1, C-Dale Quick 1

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
Liked 25 Times in 14 Posts
Originally Posted by Nachoman View Post
If I see cord, I replace. Or if it's worn enough to cause continued flatting, I replace.
I cringe when i see my friends riding with the casing exposed. What the hell, they are all lawyers, judges & doctors...they can afford new tyres. dopes
bikejrff is offline  
Likes For bikejrff:

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.