Unicyclist Community

Go Back   Unicyclist Community > Unicycling Discussion > General Unicycling Discussions

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 2017-01-25, 03:33 PM   #1
Bradford
Corporate Escapee
 
Bradford's Avatar
 
Join Date: Feb 2016
Location: North Texas
Posts: 461
tire question about 24" Dominator II rim - how skinny can I go?

I apologize in advance. I know this topic has been talked to death, but I still haven't been able to find a concise answer. Most people are wondering how fat of a tire they can get by with on a particular rim, but I'm thinking in the other direction. I'm wondering how skinny of a tire I can put on my rim. From the UDC website, it's a "Nimbus Dominator 2, 24" (black) 36H, 42mm wide, aluminum doublewall, reinforced eyelets, ERD 492". This is just the stock rim that came with my 24" Nimbus muni I bought new last year.

I've looked at Sheldon Brown's website, searched this forum, and a couple of mountain bike forums, and I think I have a general idea, but what I've come up with is that I shouldn't use something skinnier than a 2.4" tire. I used 42mm as my rim width and Sheldon's formula:

"A general guideline is that the tire width should be between 1.45/2.0 x the inner rim width."

I know this is just a general guideline, but I'm wondering if other factors might allow me to go skinnier on this particular rim. Right now I'm mostly curious to see how skinny I can go, but eventually I'd love to figure out what my range of tire widths are for this Dominator II rim.

Thanks, and sorry for another annoying tire thread!
__________________
I'm not short, I'm just really far away.

Last edited by Bradford; 2017-01-25 at 03:47 PM.
Bradford is offline   Reply With Quote
Old 2017-01-25, 06:11 PM   #2
saskatchewanian
ERIC P
 
saskatchewanian's Avatar
 
Join Date: Jan 2007
Location: La Ronge, Saskatchewan, Canada
Age: 34
Posts: 6,471
If you aren't running it off-road I would be comfortable going as skinny as the outer dimension of the rim. 42mm = 1.65"

Having the rim as wide as the tire increases the chance of pinch flats and rim damage if riding on rocks or other hard uneven surfaces but will give you really good stability right down to rim-strike pressures. It can be nice in winter when risk of pinch flat is reduced.
__________________
My friends, love is better than anger. Hope is better than fear. Optimism is better than despair. So let us be loving, hopeful and optimistic. And we’ll change the world. - Jack Layton
saskatchewanian is offline   Reply With Quote
Old 2017-01-25, 08:09 PM   #3
pierrox
Unicyclist
 
pierrox's Avatar
 
Join Date: Jul 2012
Location: Between Paris, Grenoble, NY and NC
Age: 48
Posts: 1,329
Oh that's an active conversation I'm having... about wide tire on skinny rim.
But there's info out there that's useful both ways!
The other problem with a skinny tire on a wide rim, is that the sides are more vertical than the manufacturer planned. Which changes the dynamics of the tire, especially when turning - which is where it concerns us, unicyclists...

Notube has a neat visual explanation on their website:
pierrox is offline   Reply With Quote
Old 2017-01-25, 09:54 PM   #4
Bradford
Corporate Escapee
 
Bradford's Avatar
 
Join Date: Feb 2016
Location: North Texas
Posts: 461
Quote:
Originally Posted by saskatchewanian View Post
If you aren't running it off-road I would be comfortable going as skinny as the outer dimension of the rim. 42mm = 1.65"

Having the rim as wide as the tire increases the chance of pinch flats and rim damage if riding on rocks or other hard uneven surfaces but will give you really good stability right down to rim-strike pressures. It can be nice in winter when risk of pinch flat is reduced.
Yeah, I was only wanting it for casual riding on concrete. No off-road or other extreme stuff.

Thanks, Eric!
__________________
I'm not short, I'm just really far away.
Bradford is offline   Reply With Quote
Old 2017-01-25, 09:55 PM   #5
Bradford
Corporate Escapee
 
Bradford's Avatar
 
Join Date: Feb 2016
Location: North Texas
Posts: 461
Quote:
Originally Posted by pierrox View Post
Oh that's an active conversation I'm having... about wide tire on skinny rim.
But there's info out there that's useful both ways!
The other problem with a skinny tire on a wide rim, is that the sides are more vertical than the manufacturer planned. Which changes the dynamics of the tire, especially when turning - which is where it concerns us, unicyclists...

Notube has a neat visual explanation on their website:
Thanks, Pierrox.
__________________
I'm not short, I'm just really far away.
Bradford is offline   Reply With Quote
Reply

Tags
dominator, rim, skinny, tire question about 24


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
24" torker ii tire reccomendations Englertracing General Unicycling Discussions 9 2016-03-10 05:43 AM
24 nimbus dominator 2 rim vs kh 47mm rim Capdoogie General Unicycling Discussions 1 2015-06-12 06:21 AM
[For Sale: North America] 36" Complete Wheel: Dominator 2 rim, Oregon hub, Todd tire, tubeless! Nurse Ben Trading Post 14 2013-10-29 04:32 PM
How much PSI can a 36" "TA" tire hold up? one4all General Unicycling Discussions 5 2013-08-01 01:31 PM
24" Knobby Tire - Nimbus II Freestyle Frame LiamMeron General Unicycling Discussions 3 2013-02-09 06:10 PM


All times are GMT. The time now is 09:27 PM.


Powered by vBulletin®
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright © 2001-2019 Gilby
Page generated in 0.05313 seconds with 11 queries