Tube Sizes: Interchangeability? - Kawasaki KLR 650 Forum
2008+ KLR650 Wrenching & Mod Questions For repair, maintaining or modifying discussions related to the newly updated 2008 and beyond, Generation 2 KLR650 Motorcycle.

 8Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 49 Old 04-24-2019, 05:26 PM Thread Starter
2nd Gear
 
Join Date: Nov 2018
Location: Los Angeles, CA
Posts: 234
Tube Sizes: Interchangeability?

I want to get a spare tube for my rear tire and I've noticed that the 130/80-17 size is somewhat scarce outside in the HD or UHD tubes. In fact, the only one I'm finding is Revzilla's Michelin UHD item:

https://www.revzilla.com/motorcycle/...-duty-mx-tubes

But you'll notice that this isn't exactly the right fit, it's 140/80-17. So question: I know there is some flexibility in the fitment of different sizes, so what's the rule there? Will this 140/80 work? What are the biggest and smallest sizes we can go? Also on the 90/90-21's…

2017 KLR in black
samuel is offline  
Sponsored Links
Advertisement
 
post #2 of 49 Old 04-24-2019, 07:55 PM
Pretty in Pink, dunno why
 
Tom Schmitz's Avatar
 
Join Date: Feb 2009
Location: Redondo Beach
Posts: 7,325
Garage
Does this help at all?

I shamelessly borrowed this chart from BikeBandit under the fair-use doctrine of copyright. Buy all your stuff from BikeBandit. There.



I cannot explain "Alpha" tire sizing, even though I'm a very old person.

BTW, I would not use anything except regular duty tubes.

Tom [email protected]

“If I wasn't hard, I wouldn't be alive. If I couldn't ever be gentle, I wouldn't deserve to be alive.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


Sting like a butterfly.
Tom Schmitz is offline  
post #3 of 49 Old 04-25-2019, 10:57 AM Thread Starter
2nd Gear
 
Join Date: Nov 2018
Location: Los Angeles, CA
Posts: 234
Thanks Tom, but my question isn't so much about the conversion between different sizing schemes, but rather how much latitude we have within the metric one. I.e. can I put a 140/80 tube in a 130/80 tire? Sorry if that wasn't clear. I know when I look at tubes they usually have several sizes on the package. I bet this will work, but I am curious if there's a rule of thumb for tolerances.

2017 KLR in black
samuel is offline  
 
post #4 of 49 Old 04-25-2019, 11:23 AM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,087
I never even tried to figure out the Alpha Numeric tire sizing, either. Never made any sense to this layman.


But why do those people responsible for this chart have the stupid ERROR about METRIC & ALPHA sizes in the OFF ROAD Tire section? They are all metric.
There are no Alphabets in the sizes listed under the Alpha column.

To the best of my knowledge there never were any Alpha Numeric off-road tires ever sold in the USA.

It maybe should read FULL Aspect Height / LOW Profile / INCHES.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 83,000+ miles & counting
pdwestman is online now  
post #5 of 49 Old 04-25-2019, 11:41 AM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,087
Quote:
Originally Posted by samuel View Post
Thanks Tom, but my question isn't so much about the conversion between different sizing schemes, but rather how much latitude we have within the metric one. I.e. can I put a 140/80 tube in a 130/80 tire? Sorry if that wasn't clear. I know when I look at tubes they usually have several sizes on the package. I bet this will work, but I am curious if there's a rule of thumb for tolerances.
Only if the inner tube in Question is listed to fit say 120-140/80 - 17 should it be used in a 130 wide tire.
Installing a tube intended for a Minimum Width of 140 will usually create wrinkles when installed into a narrower tire.

Better to stretch the 120 up to 130 or up to 140 than to create wrinkles which will chaff and can cause a leak.

When in doubt, use the smaller tube, it will expand.
I have in-stock an IRC-62 inner tube intended to fit 4.00-5.10 -17 tires or 110/100 to 130/80 -17 tires.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 83,000+ miles & counting
pdwestman is online now  
post #6 of 49 Old 04-25-2019, 11:50 AM
Pretty in Pink, dunno why
 
Tom Schmitz's Avatar
 
Join Date: Feb 2009
Location: Redondo Beach
Posts: 7,325
Garage
Quote:
Originally Posted by pdwestman View Post
...But why do those people responsible for this chart have the stupid ERROR about METRIC & ALPHA sizes in the OFF ROAD Tire section? They are all metric...
I don't know, of course, but I have seen that chart presented with the same data on more than one site.

Tom [email protected]

“If I wasn't hard, I wouldn't be alive. If I couldn't ever be gentle, I wouldn't deserve to be alive.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


Sting like a butterfly.
Tom Schmitz is offline  
post #7 of 49 Old 04-25-2019, 11:57 AM
Pretty in Pink, dunno why
 
Tom Schmitz's Avatar
 
Join Date: Feb 2009
Location: Redondo Beach
Posts: 7,325
Garage
What Paul said; the size on the tube needs to cover the size on the tire.

I think that the thicker the tube the less emergency latitude there is. For example, if one carries only a front tube on the bike and the rear tube needs to be replaced one can put the spare front tube in the back tire and go home. That may be problematic if one is using one of those super heavy duty tubes that weigh a ton and get kinda hot when in use. Not that I'm poo-pooing the use of super heavy duty tubes (which I am).

For normal use buy the tube that fits the tire and don't look for latitude except by the manufacturer's design. The 4.00/5.10-17 tube would be a good find.
samuel likes this.

Tom [email protected]

“If I wasn't hard, I wouldn't be alive. If I couldn't ever be gentle, I wouldn't deserve to be alive.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


Sting like a butterfly.
Tom Schmitz is offline  
post #8 of 49 Old 04-25-2019, 12:34 PM Thread Starter
2nd Gear
 
Join Date: Nov 2018
Location: Los Angeles, CA
Posts: 234
Quote:
Originally Posted by Tom Schmitz View Post
That may be problematic if one is using one of those super heavy duty tubes that weigh a ton and get kinda hot when in use. Not that I'm poo-pooing the use of super heavy duty tubes (which I am).
I heard this about the thick tubes, but I also heard they're not going to generate heat in road conditions because they'll be too inflated to slide around. I'm curious if there's a different way that heat gets built up tho…

2017 KLR in black
samuel is offline  
post #9 of 49 Old 04-25-2019, 12:49 PM
OverDrive
 
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 5,087
The thicker the rubber the warmer a tire and/or tube combo will run. On either dirt or asphalt.

That is part of the reason that tire tread is only XX deep!

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 83,000+ miles & counting
pdwestman is online now  
post #10 of 49 Old 04-25-2019, 12:55 PM Thread Starter
2nd Gear
 
Join Date: Nov 2018
Location: Los Angeles, CA
Posts: 234
Quote:
Originally Posted by pdwestman View Post
The thicker the rubber the warmer a tire and/or tube combo will run. On either dirt or asphalt.

That is part of the reason that tire tread is only XX deep!
Good to know. It also makes the job of finding tubes easier!

2017 KLR in black
samuel is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki KLR 650 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Side Panel Interchangeability? Bluehighways 1987 to 2007 Wrenching & Mods 2 03-09-2018 01:46 PM
new and old gen wheel interchangeability? jonboyf 1987 to 2007 Wrenching & Mods 2 10-09-2010 08:26 PM
tube or no tube YANKEES6161 KLR & Other Motorcycle Related Discussion 5 12-11-2008 10:18 PM
Axel nut sizes and torque settings?? The Kurgan 1987 to 2007 Wrenching & Mods 3 08-01-2007 07:48 AM
Valve job shim question....commons sizes Bones 1987 to 2007 Wrenching & Mods 9 10-10-2006 02:34 PM

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome