General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

Confused on tire dimensions

Old 02-09-14, 01:37 PM
  #1  
Get Wiggly
Newbie
Thread Starter
 
Join Date: Feb 2014
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Confused on tire dimensions

I have these super ultra-cheap bike tires that have the following label on them;
700x250 , (25-622) , 28x1-5/8x1

I can't find this size anywhere. They were HELL to get on my rims. My rims don't have a size, but I'm guessing they are 700c. They are labelled Aofeng 8081TS

I might just buckle and buy new rims, tubes, and tires - but I'd rather not. My tubes are flat and I need new ones. What size should I get for this odd tire size?
Get Wiggly is offline  
Old 02-09-14, 01:41 PM
  #2  
LesterOfPuppets
cowboy, steel horse, etc
 
LesterOfPuppets's Avatar
 
Join Date: Sep 2008
Location: Valley of the Sun.
Posts: 32,431

Bikes: everywhere

Mentioned: 54 Post(s)
Tagged: 1 Thread(s)
Quoted: 3838 Post(s)
Liked 40 Times in 34 Posts
Yep, 700c. 25mm. Some road tires are REALLY hard to get on some road rims.

Tubes will probably be a range. 25-28mm or something like that.
LesterOfPuppets is offline  
Old 02-09-14, 02:02 PM
  #3  
prathmann
Senior Member
 
Join Date: Nov 2008
Location: Bay Area, Calif.
Posts: 7,262
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 657 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Get Wiggly View Post
I have these super ultra-cheap bike tires that have the following label on them;
700x250 , (25-622) , 28x1-5/8x1
The first label is probably actually 700x25C (no idea why there's the penchant for putting the 'C' next to the width rather as 700c).
The second label is consistent with this, giving the nominal dimension in mm: 25mm width, 622mm bead seat diameter of the rim - aka '700c'.
The third label is inconsistent. Sometimes 700c size wheels and tires are referred to as either 28" or 29", but usually this is when wider tires are used. And if the tire width is about 25mm then it would be about 1", not 1 5/8".

Just about any reasonably narrow 700c (or 27") tube should work fine. They're usually labeled with a range of widths since they stretch so easily. Something like 19 - 28mm. Make sure you get the right valve style (Shrader or Presta) to match the hole in the rim.
prathmann is offline  
Old 02-09-14, 03:55 PM
  #4  
JanMM
rebmeM roineS
 
JanMM's Avatar
 
Join Date: Jan 2006
Location: Metro Indy, IN
Posts: 15,462

Bikes: RANS V3 ti, RANS V-Rex, RANS Screamer

Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 462 Post(s)
Liked 15 Times in 15 Posts
Originally Posted by Get Wiggly View Post
I have these super ultra-cheap bike tires that have the following label on them;
700x250 , (25-622) , 28x1-5/8x1

I can't find this size anywhere. They were HELL to get on my rims. My rims don't have a size, but I'm guessing they are 700c. They are labelled Aofeng 8081TS

I might just buckle and buy new rims, tubes, and tires - but I'd rather not. My tubes are flat and I need new ones. What size should I get for this odd tire size?
More than just the answer to your question: http://sheldonbrown.com/tire-sizing.html
__________________
RANS V3 Ti, RANS V-Rex, RANS Screamer
JanMM is offline  
Old 02-09-14, 04:57 PM
  #5  
Jeff Wills
Insane Bicycle Mechanic
 
Jeff Wills's Avatar
 
Join Date: Mar 2008
Location: other Vancouver
Posts: 8,945
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 420 Post(s)
Liked 16 Times in 12 Posts
Originally Posted by Get Wiggly View Post
I have these super ultra-cheap bike tires that have the following label on them;
700x250 , (25-622) , 28x1-5/8x1

I can't find this size anywhere. They were HELL to get on my rims. My rims don't have a size, but I'm guessing they are 700c. They are labelled Aofeng 8081TS

I might just buckle and buy new rims, tubes, and tires - but I'd rather not. My tubes are flat and I need new ones. What size should I get for this odd tire size?
As others have said, your tire is a pretty common 700 x 25C. Any 700C tire will fit the rim, with some gotchas. Read about "width compatibility" here: http://www.sheldonbrown.com/tire-sizing.html#width

Narrow tires (like yours) on narrow rims (like yours) are typically tough to mount and remove. You can make the job easier by using a thinner rims strip (this covers the spoke holes on the rim), such as Rox: http://www.universalcycles.com/shopp...1&category=140
__________________
Jeff Wills

Comcast nuked my web page. It will return soon..
Jeff Wills is offline  
Old 02-10-14, 09:58 AM
  #6  
Coluber42
Senior Member
 
Join Date: May 2010
Location: Medford, MA
Posts: 335
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Is it remotely possible that you actually have (nominal) 27" rims? It would only be if you have an older, most likely English, bike. 27" wheels are a bit larger than 700c.

WRT the third label, where it says "28x1-5/8x1", I don't think that's actually inconsistent; it's just because in some places the name of the size we call "700c" is "28-inch". And yes, that size is smaller than what we call "27-inch", and has the same bead seat diameter as what we call a "29er". Incidentally, 650C and 650B have different bead seat diameters; also, there are two different bead seat diameters that are both known as 20" wheels, but one is common for fatter tires and the other for skinnier. What could possibly be confusing about that???
It's sort of ironic, actually; I lived in Germany for a couple years, and over there, they call standard road wheels 28-inch. And then make fun of us for not using the metric system!
Part of the inconsistency in tire size nomenclature is because at various times they used to measure the entire diameter of the mounted and inflated tire, and use A, B, C, etc. to denote the width. Hence 700C, 650B, etc. As stuff got more standard, people got more interested in the bead seat diameter, which is obviously smaller than the overall diameter of the mounted tire. That's where the 622 part comes from.

I'm just waiting for pizza places to get in on this game. For the longest time, my better half was on a quest for a 700c pizza.
Coluber42 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Andy_K
Cyclocross and Gravelbiking (Recreational)
0
02-11-13 04:48 PM
superduper54
Singlespeed & Fixed Gear
8
07-03-09 01:48 PM
donrhummy
Road Cycling
65
04-16-08 03:57 AM
Jet Travis
Fifty Plus (50+)
0
01-21-08 04:47 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


Thread Tools
Search this Thread

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

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.