Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Do I need a new tire already?

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Do I need a new tire already?

Old 09-26-12, 01:45 PM
  #1  
nPn
Newbie
Thread Starter
 
Join Date: Apr 2008
Posts: 49

Bikes: 2007 Kona Cinder Cone, 2012 Raleigh Revinio 3.0

Likes: 0
Liked 6 Times in 4 Posts
Do I need a new tire already?

This past weekend I gave my new bike a good cleaning. In the processes I noticed two things with my rear tire:
First the bottom feels like it is getting "flat", and second I found a fine "split" across the width. The split does not seem too thick, but you can see it and feel it.
The bike only has about 900 miles on it, and from what I can tell tires should last longer than that. The tires are Vittoria Zaffiro Pro's 700c x 23.

So two questions.

1) I am guessing the "flat" bottom is not normal, but not sure what I did wrong there? I check the inflation at least once a week 85 miles and inflate to 110 (I am about 180lbs).
2) I am assuming I should probably replace the tire since it has a split, but was wondering if this was due to some kind of road hazard or maybe just a defective tire. What kind of mileage should I expect for this particular tire (the Zaffiro Pro's)?
nPn is offline  
Old 09-26-12, 01:50 PM
  #2  
Galveston County Texas
 
10 Wheels's Avatar
 
Join Date: Nov 2007
Location: In The Wind
Posts: 33,272

Bikes: 02 GTO, 2011 Magnum

Liked 1,254 Times in 630 Posts
Flat area is the road contact area...Yes Normal.

Air up your tires before each ride.

Cuts will destroy tires.

You can still ride it if it doesn't go all the way to the inside.
__________________
Fred "The Real Fred"

10 Wheels is offline  
Old 09-26-12, 02:10 PM
  #3  
Carpe Velo
 
Yo Spiff's Avatar
 
Join Date: Dec 2011
Location: Fort Worth, Texas
Posts: 2,519

Bikes: 2000 Bianchi Veloce, '88 Schwinn Prologue, '90 Bianchi Volpe,'94 Yokota Grizzly Peak, Yokota Enterprise, '16 Diamondback Haanjo, '91 Bianchi Boardwalk, Ellsworth cruiser

Liked 14 Times in 13 Posts
I got over 2500 miles on a 25c Zaffiro (regular, not the pro version) in the rear before the profile became squared off and I replaced it as a precautionary measure. The front one is still going strong.

Your cut or crack sounds like a cause for concern however. I'd say replace it if you have any doubts.
Yo Spiff is offline  
Old 09-26-12, 02:17 PM
  #4  
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438

Bikes: Trek 5500, Colnago C-50

Likes: 0
Liked 7 Times in 6 Posts
Any 110 psi tire needs to be fully inflated before each ride.
Al1943 is offline  
Old 09-26-12, 02:52 PM
  #5  
nPn
Newbie
Thread Starter
 
Join Date: Apr 2008
Posts: 49

Bikes: 2007 Kona Cinder Cone, 2012 Raleigh Revinio 3.0

Likes: 0
Liked 6 Times in 4 Posts
OK, so I guess I will get a new pair. I guess the current rear tire (the one with the small split) I can use when I get a trainer this winter and the front tire can go in my bag as a backup. I will make sure I inflate the new tires before each ride. BTW, I am thinking about the Vittoria Rubino Pro's, they seem to have good reviews.
nPn is offline  
Old 09-26-12, 03:09 PM
  #6  
It's MY mountain
 
DiabloScott's Avatar
 
Join Date: Sep 2006
Location: Mt.Diablo
Posts: 10,011

Bikes: Klein, Merckx, Trek

Liked 3,056 Times in 1,654 Posts
Originally Posted by nPn
2) I am assuming I should probably replace the tire since it has a split, but was wondering if this was due to some kind of road hazard or maybe just a defective tire. What kind of mileage should I expect for this particular tire (the Zaffiro Pro's)?
Cuts are caused by running over sharp objects - not the tire's fault. If you have a lot of glass and shrapnel where you ride, you might want tires with thicker tread so the cuts won't be fatal. If you don't get cuts, your Zaffiro on the rear ought to last a couple thousand miles before the tread wears through. The other way tires can fail is casing rot - usually more common if you ride in the rain.

Originally Posted by nPn
OK, so I guess I will get a new pair. I guess the current rear tire (the one with the small split) I can use when I get a trainer this winter and the front tire can go in my bag as a backup.
Common practice is to put the front one on the rear and put a new one on the front... it'll help get a little more life out of them.
DiabloScott is offline  
Old 09-27-12, 10:54 AM
  #7  
Hello
 
zebede's Avatar
 
Join Date: Aug 2007
Location: Suncoast, Florida
Posts: 936

Bikes: n+1

Liked 29 Times in 25 Posts
Squaring off at 900 miles seem very short to me...I would not buy that model of tire again.

Though I would agree that once a week inflation is not enough for 110 psi tire. I will drop 20 psi or more in that time frame on my road bike when it sets and waits for use on the weekend. However my commuter with 32c tires I can inflate to 80 psi and by the end of the week of riding I am close to 70 psi.
zebede is offline  
Old 09-27-12, 12:58 PM
  #8  
working on my sandal tan
 
ThermionicScott's Avatar
 
Join Date: Aug 2011
Location: CID
Posts: 22,649

Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)

Liked 2,579 Times in 1,586 Posts
Originally Posted by nPn
This past weekend I gave my new bike a good cleaning. In the processes I noticed two things with my rear tire:
First the bottom feels like it is getting "flat", and second I found a fine "split" across the width. The split does not seem too thick, but you can see it and feel it.
The bike only has about 900 miles on it, and from what I can tell tires should last longer than that. The tires are Vittoria Zaffiro Pro's 700c x 23.

So two questions.

1) I am guessing the "flat" bottom is not normal, but not sure what I did wrong there? I check the inflation at least once a week 85 miles and inflate to 110 (I am about 180lbs).
2) I am assuming I should probably replace the tire since it has a split, but was wondering if this was due to some kind of road hazard or maybe just a defective tire. What kind of mileage should I expect for this particular tire (the Zaffiro Pro's)?
I can't see it.

Some more data would help -- do you climb a lot of hills out of the saddle? Do you rely on your rear brake for most of your stopping?

Hilly riding naturally wears the rear tire faster than flatland riding, but the skidding from using the rear brake too much is a common cause of premature wear. Learn to love that front brake!

(As a side-note, underinflation should actually help with the squaring-off problem, as the contact patch is widened.)
__________________
Originally Posted by chandltp
There's no such thing as too far.. just lack of time
Originally Posted by noglider
People in this forum are not typical.
RUSA #7498

Last edited by ThermionicScott; 09-27-12 at 01:03 PM.
ThermionicScott is offline  
Old 09-27-12, 01:10 PM
  #9  
Senior Member
 
chriskmurray's Avatar
 
Join Date: Aug 2012
Location: Colorado Springs
Posts: 1,134

Bikes: Borealis Echo, Ground Up Designs Ti Cross bike, Xtracycle, GT mod trials bike, pixie race machine

Likes: 0
Liked 2 Times in 2 Posts
It is hard to base useful life of a tire on mileage alone. If you are a heavier rider, climb a lot, or stand and sprint a lot all of those things wear a tire more than say a lighter tire who spins easily and never rides any hills.

I have seen tires worn out in around 1000 miles before.
chriskmurray is offline  
Old 09-27-12, 02:59 PM
  #10  
Senior Member
 
rekmeyata's Avatar
 
Join Date: Sep 2010
Location: NE Indiana
Posts: 8,692

Bikes: 2020 Masi Giramondo 700c; 2013 Lynskey Peloton; 1992 Giant Rincon; 1989 Dawes needs parts; 1985 Trek 660; 1985 Fuji Club; 1984 Schwinn Voyager; 1984 Miyata 612; 1977 Raleigh Competition GS

Liked 257 Times in 207 Posts
If the cut is just a cut to the rubber tread and did not cut the cord then your good to ride as long as that cut isn't huge! Also you can fill the cut in with Gorilla Glue IF the cut didn't damage the cords, using a toothpick to shove the glue into the crack and cover the top of the cut, the glue will dry to a foam simply scrape it off and any residue foam will wear off in about 5 miles of riding or less. I use to recommend SuperGlue but they changed their formula and doesn't work well any more.

Pics of the tire cut will go a long ways in determining if it can be fixed.

Heck I cut a tire completely through the tire tread and casing while riding. I simply applied a tire boot to the underside and filled in the top with SuperGlue, waited about 10 minutes for the glue to hardened and my patience for it to do that wore out, then continued on my ride without a problem. In fact used the tire for about 2 weeks until a new tire came in.
rekmeyata is offline  
Old 09-27-12, 05:00 PM
  #11  
Senior Member
 
Join Date: Feb 2009
Posts: 6,660
Liked 171 Times in 138 Posts
The flat area is normnl wear. Ride it until the cord shows then put the front on the rear and a new one on the front.
Tire pressure is based on width and total weight (you and the bike). https://www.adventurecycling.org/res...SIRX_Heine.pdf
davidad is offline  
Old 09-27-12, 10:00 PM
  #12  
Senior Member
 
rekmeyata's Avatar
 
Join Date: Sep 2010
Location: NE Indiana
Posts: 8,692

Bikes: 2020 Masi Giramondo 700c; 2013 Lynskey Peloton; 1992 Giant Rincon; 1989 Dawes needs parts; 1985 Trek 660; 1985 Fuji Club; 1984 Schwinn Voyager; 1984 Miyata 612; 1977 Raleigh Competition GS

Liked 257 Times in 207 Posts
There's an easy to use calculator on the internet put out by Michelin using the same formula that's been around for at least as long as I've been riding, that's 40 years! Anyway all you do is figure in your fully clothed ready to ride weight, plus your fully equipped bike including full water bottles, add the two together then put the total weight into the 2nd (middle) calculator; then simply select your rear and front tire size and bam your very close to idea air pressure is displayed for both front and rear. This calculator is correct to within 5 psi low or high, some people want a softer ride so they can reduce up to 5 psi and others might want a tad firmer ride so they can put in up to 5 more. But it's design for the best wear, best handling.

Anyway see: https://www.dorkypantsr.us/bike-tire-...alculator.html
rekmeyata is offline  
Old 09-28-12, 05:49 PM
  #13  
Senior Member
 
DannoXYZ's Avatar
 
Join Date: Jul 2005
Location: Saratoga, CA
Posts: 11,736
Liked 9 Times in 6 Posts
Personally, I like to use the fattest tyres I can fit into the frame. Gives me more pinch-flat resistance and allows the use of lower-pressure for comfort. And lasts longer than narrower tyres too.
DannoXYZ is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
PatrickGSR94
Bicycle Mechanics
39
06-25-15 08:31 AM
floridamtb
Road Cycling
41
08-04-13 08:25 AM
North Coast Joe
Bicycle Mechanics
7
04-29-13 04:13 PM
bikester62
Bicycle Mechanics
9
02-23-12 06:36 PM
work4bike
Bicycle Mechanics
12
09-17-11 05:06 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Your Privacy Choices -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.