Go Back  Bike Forums > Bike Forums > Folding Bikes
Reload this Page >

Curious: OS20 on a folder?

Notices
Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

Curious: OS20 on a folder?

Old 06-11-19, 06:21 PM
  #1  
sjanzeir
Senior Member
Thread Starter
 
Join Date: Apr 2016
Location: Jeddah, Saudi Arabia
Posts: 461

Bikes: 1990 Raleigh Flyer; 2014 Trek 7.6 FX (size 15"); 2014 Trek 7.6 FX (size 17.5"); 2014 Dahon Speed D8; 2015 Dahon Mu D8

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 174 Post(s)
Liked 15 Times in 14 Posts
Curious: OS20 on a folder?

We know that the "regular" 451 rim/tire sizes will fit into the frames and forks of most folders, but has anyone tried fitting OS20 rims and tires?
sjanzeir is offline  
Old 06-11-19, 07:12 PM
  #2  
Nightdiver
7ft of Cet-Bak
 
Nightdiver's Avatar
 
Join Date: Oct 2008
Location: Out and about
Posts: 494
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 74 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
OS20 is just marketing jargon referring to 451 parts. The limiting factor is the tire size since that will determine the total diameter of the wheel and whether that will then fit into a frame/fork. Only way to know for sure is to find out the current dimensions of the "stock" wheels and then see what the equivalent 451 wheel diameter is. Or of course you could measure the actual frame if physically present. One example is a frame meant to take a 406-50 should be able to take a 451-28.
Nightdiver is offline  
Old 06-11-19, 09:36 PM
  #3  
sjanzeir
Senior Member
Thread Starter
 
Join Date: Apr 2016
Location: Jeddah, Saudi Arabia
Posts: 461

Bikes: 1990 Raleigh Flyer; 2014 Trek 7.6 FX (size 15"); 2014 Trek 7.6 FX (size 17.5"); 2014 Dahon Speed D8; 2015 Dahon Mu D8

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 174 Post(s)
Liked 15 Times in 14 Posts
Originally Posted by Nightdiver View Post
The limiting factor is the tire size since that will determine the total diameter of the wheel and whether that will then fit into a frame/fork.
Which was exactly my question - whether a 451 tire that's as wide as a typical 406 tire and, therefore, taller than even a regular 37-451/1-3/8, will have enough clearance.

If my own measurements are anything to go by (and I'm sure they're not,) I'llnneed to remove my fenders because a tire that's just shy of 21" in overall diameter won't clear the mounting brackets.

With that being said, I know for a fact that a 47-406 (20x1.80) tire will clear just so, but a 451 tire that's as wide as 1.85" (or even 1.60", in the case of the Tioga Powerblock OS20) might not.

As you said, though, we can't know for sure unless someone actually tries it.
sjanzeir is offline  
Old 06-11-19, 10:17 PM
  #4  
Nightdiver
7ft of Cet-Bak
 
Nightdiver's Avatar
 
Join Date: Oct 2008
Location: Out and about
Posts: 494
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 74 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by sjanzeir View Post
Which was exactly my question - whether a 451 tire that's as wide as a typical 406 tire and, therefore, taller than even a regular 37-451/1-3/8, will have enough clearance.
Without knowing the exact frame/fork being discussed it is impossible to say. What is a "typical" width 406? I have ridden 406 bikes designed for everything between 28mm and 62mm. Some of those had a lot of extra space available, while others were a tight fit.

Like I said, the total diameter of the wheel is the determining factor. A 451-28 is roughly equivalent to a 406-50. So if a frame is designed to fit a 406-50 as its max size tire, then it will fit a 451-28 but no way would it fit a 451-50.
Nightdiver is offline  
Old 06-17-19, 01:49 AM
  #5  
sjanzeir
Senior Member
Thread Starter
 
Join Date: Apr 2016
Location: Jeddah, Saudi Arabia
Posts: 461

Bikes: 1990 Raleigh Flyer; 2014 Trek 7.6 FX (size 15"); 2014 Trek 7.6 FX (size 17.5"); 2014 Dahon Speed D8; 2015 Dahon Mu D8

Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 174 Post(s)
Liked 15 Times in 14 Posts
I should've said "typical BMX" instead of just plain "typical," or, more specifically for me, sizes between 1.75 and about 2.10 or so. I know for a fact that a 406x2.10 is just about as wide as I can fit without it rubbing the chain in first gear, and still have a comfortable few millimeters of clearance to the tubing. And I see your point - a 451 tire that's as wide as the wider 406 tires (i.e. greater than 37mm/1-3/8) is very likely to be too large in overall diameter to clear the fork steerer/brake caliper bridge, even if it clears the fork blades/seat stays/chain stays. Thanks for pointing that out.
sjanzeir is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
strauts1
Hybrid Bicycles
7
08-13-17 06:46 PM
Wrenchspinnerjr
Bicycle Mechanics
15
02-16-16 05:28 PM
Distinguished
Bicycle Mechanics
5
09-15-15 01:52 PM
gamereric22
Mountain Biking
3
06-26-11 06:40 AM
mazdaspeed
Mountain Biking
3
06-22-10 06:50 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.