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

20x1.75" tires all the same?

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.

20x1.75" tires all the same?

Old 12-19-17, 07:33 PM
  #1  
jefnvk
Senior Member
Thread Starter
 
jefnvk's Avatar
 
Join Date: Apr 2015
Location: Metro Detroit/AA
Posts: 8,213

Bikes: 2016 Novara Mazama

Mentioned: 62 Post(s)
Tagged: 0 Thread(s)
Quoted: 3590 Post(s)
Liked 14 Times in 12 Posts
20x1.75" tires all the same?

Yes, I know I should always go off the ETRTO tire sizing, but the Dahon folder I just picked up has tires that are in such awful shape that I can barely read the 20x1.75", and nothing else. It is an older bike that I can't find much about online. Are there any goofy tire variants in this size that I have to worry about?

Also will take any recommendations on tires (preferably Contis, as I get a substantial corporate discount) for city commuting use.
jefnvk is offline  
Old 12-19-17, 08:57 PM
  #2  
CliffordK
Senior Member
 
CliffordK's Avatar
 
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 22,424
Mentioned: 166 Post(s)
Tagged: 0 Thread(s)
Quoted: 8522 Post(s)
Liked 79 Times in 71 Posts
There are 406 and 451 wheels.

Most of the 20x1.75 should be 406, and I would expect that on a Dahon.

But, if in doubt, measure.

I think Schwalbe makes some durable 406 semi-slick tires. Marathon, Marathon Plus, and maybe Durano or Ultremo.
CliffordK is offline  
Old 12-19-17, 09:52 PM
  #3  
Abu Mahendra
Senior Member
 
Join Date: Jan 2016
Location: Bali
Posts: 2,237

Bikes: In service - FSIR Spin 3.0, Bannard Sunny minivelo, Dahon Dash Altena folder. Several others in construction or temporarily decommissioned.

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 891 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by jefnvk View Post
Yes, I know I should always go off the ETRTO tire sizing, but the Dahon folder I just picked up has tires that are in such awful shape that I can barely read the 20x1.75", and nothing else. It is an older bike that I can't find much about online. Are there any goofy tire variants in this size that I have to worry about?

Also will take any recommendations on tires (preferably Contis, as I get a substantial corporate discount) for city commuting use.
Decimal (e.g. 20x1.75) is 406. Fractional (e.g. 20x 1 3/8) is 451.
Abu Mahendra is offline  
Old 12-19-17, 09:55 PM
  #4  
dorkypants
Senior Member
 
dorkypants's Avatar
 
Join Date: Feb 2006
Posts: 489
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Sheldon Brown's page on tire sizes says that 20" tires in decimal inch widths are ETRTO 406 mm, whereas 20" in fractional inch widths are (with some exceptions) ETRTO 451 mm.

Can't speak to 406s but I've been using Schwalbe Duranos and/or Panaracer Minits Lites in 451s and have been happy with both (I buy whichever is cheaper when I'm shopping for tires).
dorkypants is offline  
Old 12-19-17, 09:58 PM
  #5  
jur
Senior Member
 
Join Date: May 2005
Location: Melbourne
Posts: 7,400
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 314 Post(s)
Likes: 0
Liked 2 Times in 1 Post
As long as you stay with 406mm ERTRO sizing you will be good. There are 2 20" tyre sizes; the other one is 451mm. Typically that one is indicated in fraction of an inch width e.g. 20x1-3/8". The 406 is indicated in decimal width, e.g. 20x1.75".
jur is offline  
Old 12-20-17, 03:45 AM
  #6  
BikeLite
Senior Member
 
Join Date: Oct 2005
Posts: 755
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 196 Post(s)
Likes: 0
Liked 1 Time in 1 Post
I am using Conti Ride Tours at 1.75 on my Zootr Swift and like them. They are heavier tires made for touring.
BikeLite is offline  
Old 12-20-17, 08:04 AM
  #7  
jefnvk
Senior Member
Thread Starter
 
jefnvk's Avatar
 
Join Date: Apr 2015
Location: Metro Detroit/AA
Posts: 8,213

Bikes: 2016 Novara Mazama

Mentioned: 62 Post(s)
Tagged: 0 Thread(s)
Quoted: 3590 Post(s)
Liked 14 Times in 12 Posts
Thanks, you all have confirmed what I suspected!
jefnvk is offline  
Old 12-20-17, 10:04 AM
  #8  
12boy
Senior Member
 
12boy's Avatar
 
Join Date: Oct 2012
Location: casper wy usa
Posts: 408

Bikes: brompton sl, surly steamroller, fuji track, gary fisher bmx minivelo etc

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 125 Post(s)
Liked 0 Times in 0 Posts
What's good in 406 tires is related to use.....hate flats Schwalbe marathons are good. Want speed, then Kojaks are good. Need a softer ride perhaps Big Apples. All tires are a compromise between rolling resistance, flat protection, handling, cushioning and price if not other concerns. I have been using 1 1/2 Kenda Kwests on my Swift and Nano with no troubles, really.
12boy is offline  
Old 12-20-17, 10:25 AM
  #9  
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 41,632

Bikes: 8

Mentioned: 188 Post(s)
Tagged: 0 Thread(s)
Quoted: 6838 Post(s)
Likes: 0
Liked 215 Times in 179 Posts
there wont be wide 451

(an old 451 wheel BMX in the LBS, a moto sprint bike , looks drastically different, placed next to the typical 406 BMX stunt bike..


from Sutherlands : 406 rim, bead seat circumference is 1274 , OD 422..

451 circumference 1416 , OD 463




...
fietsbob is offline  
Old 12-20-17, 09:49 PM
  #10  
bent4me
Senior Member
 
bent4me's Avatar
 
Join Date: Dec 2002
Location: Englishtown, NJ
Posts: 228

Bikes: Recumbents

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
My go to tire is Schwalbe Marathon Green Guard. Surprisingly fast for a heavy tire, nice ride and good flat protection. Have 3k miles on my Xootr Swift and good for at least another 3.
bent4me is offline  
Old 12-22-17, 04:19 AM
  #11  
MultiplexMan
Member
 
Join Date: Dec 2005
Location: Sydney
Posts: 38

Bikes: Brompton-Vostok, Cannondale Hooligan, BF Fixie, Litespeed OBED, Cannondale Badboy

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Liked 0 Times in 0 Posts
Have a look at the BMX tyre section of your local bike store. I've had a good run with a varied selection of Maxxis, Vee Rubber and even Schwalbe BMX tyres. The advantage is you can select a tread pattern that closely matches your actual riding surface. The competition tyres are surprisingly light but be aware that some have soft compounds.

BMX tyres are available in 406 (most common) and 451.

I use Schwalbe Marathon Plus for the ultimate in puncture resistance. This comes at a price - ride quality and response does suffer.
MultiplexMan is offline  
Old 12-23-17, 12:00 AM
  #12  
tcs
Palmer
 
tcs's Avatar
 
Join Date: Mar 2007
Location: Parts Unknown
Posts: 5,917

Bikes: 1980 Mike Melton, 1982 Stumpjumper, 1982 Santana, 1984 Alex Moulton AM, 2008 BikeFriday tikit T-11, 2010 Dawes Briercliffe, 2017 Dahon Curl i5, 2019 Surly ˝DT14

Mentioned: 21 Post(s)
Tagged: 0 Thread(s)
Quoted: 544 Post(s)
Likes: 0
Liked 40 Times in 36 Posts
Originally Posted by jefnvk View Post
Also will take any recommendations on tires (preferably Contis, as I get a substantial corporate discount) for city commuting use.
Conti Sport Contact IIs seemed to have been the fastest rolling 20". These have been supplanted in Conti line-up with the Contact Speed - perhaps narrower than you want to ride in the city?
tcs is offline  
Old 12-23-17, 04:28 AM
  #13  
BikeLite
Senior Member
 
Join Date: Oct 2005
Posts: 755
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 196 Post(s)
Likes: 0
Liked 1 Time in 1 Post
There are currently three city/trekking conti tires for 20" wheels.
1. Contact in 1.40 and 1.75
2. Ride Tour in 1.75
3. Contact Speed in 1.10

Last edited by BikeLite; 12-23-17 at 04:32 AM.
BikeLite is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
spectastic
Bicycle Mechanics
4
07-05-19 06:39 PM
Blacksail
Singlespeed & Fixed Gear
6
03-09-09 08:33 PM
alwaysbefirst
Road Cycling
1
07-25-05 03:26 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.