Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-21-10, 04:06 PM   #1
tspain
Newbie
Thread Starter
 
Join Date: Sep 2010
Bikes:
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
ADVICE NEEDED - use 27x1-1/8 tires on 27x1-1/4 rims?

I misordered some panaracer pansela tires yesterday online to replace some old tires on my dad's Romic bicycle that he had bought 30 years ago.

The bike shop has already sent them out.

When I called the shop, I was told that the 27x1-1/8 tires might fit on the rims that I already have.

Does anybody have any suggestions?
Will the 27x1-1/8 tires fit though my rims currently are holding 27x1-1/4 tires?

Keep in mind that I've read that the bead on today's tires doesn't fit well with old rims (even when they are of the appropriate size).
tspain is offline   Reply With Quote
Old 09-21-10, 04:27 PM   #2
bikeman715
Senior Member
 
bikeman715's Avatar
 
Join Date: Mar 2008
Location: Salinas , Ca.
Bikes: Bike Nashbar AL-1 ,Raligh M50 , Schwinn Traveler , and others
Posts: 2,417
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
if they do fit it be a very tight fit. you be better at matching the ISO number on the old tires and/or rims. try returning them for the right size.
bikeman715 is offline   Reply With Quote
Old 09-21-10, 04:37 PM   #3
skilsaw
Senior Member
 
skilsaw's Avatar
 
Join Date: Jul 2010
Location: Victoria, Canada
Bikes: Cannondale t1, Koga-Miyata World Traveller
Posts: 1,546
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Try them on before you send them back.
Personally, unless they are not the size the sidewall says they are, I can't see any problem.
skilsaw is offline   Reply With Quote
Old 09-21-10, 06:20 PM   #4
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,847
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
The size difference will be no problem. My '85 Bridgestone 400 came factory stock with 27x1-1/8" tires on rims marked 27x1-1/4".

However there may be another problem. Really old rims lack a "hook bead", that is a ridge inside the rim's tire channel that mates with a corresponding groove on the tire bead. The hook bead along with matching tires forms a strong interlocking grip and allows the tires to remain on the rim at high pressure of 100 psi or more. Older "straight wall" rims lack this bead and won't retain even snug fitting tires above about 80 psi.

My '85 Bridgestone came with hook bead rims but a friend's Raleigh from the early 70's did not so, sometime in that interval, hooked beads became the norm.
HillRider is offline   Reply With Quote
Old 09-21-10, 06:37 PM   #5
gt35built
Banned.
 
Join Date: Apr 2010
Location: Chicago IL
Bikes: trek t1
Posts: 331
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
They should work safely. I wouldnt run them at the max recommend pressure though.
gt35built is offline   Reply With Quote
Old 09-21-10, 06:47 PM   #6
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 19,693
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 452 Post(s)
Weinmann concave is an example of a wire on rim without a hook bead..
inside surface is concave giving the rim sides a wide brake track.
what rim exactly is on the bike ? brand name.

you Know Pictures if you cannot read a label... and measure how wide the rim is ..
Hook bead + 19mm wide and you're good .. if its a wide ... touring rim may still be Ok,

Once you got the old tire off see if there is a crochet inside..

Last edited by fietsbob; 09-21-10 at 06:50 PM.
fietsbob is online now   Reply With Quote
Old 09-21-10, 07:35 PM   #7
tspain
Newbie
Thread Starter
 
Join Date: Sep 2010
Bikes:
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks.
I appreciate your advice.
Though the bike shop will exchange them, I was hoping that they would fit so I wouldn't have to pay to have them shipped back and have the new ones shipped again.


Quote:
Originally Posted by bikeman715 View Post
if they do fit it be a very tight fit. you be better at matching the ISO number on the old tires and/or rims. try returning them for the right size.
tspain is offline   Reply With Quote
Old 09-21-10, 07:52 PM   #8
tspain
Newbie
Thread Starter
 
Join Date: Sep 2010
Bikes:
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for your input, everyone.
I appreciate it since I know nothing about bikes.

The rims are labeled "ARAYA 27x1-1/4 w/o HP. JAPAN" and they say Shimano on the hub/axle(?).
I'm not sure if I'll be able to measure them; I'm a poor college student without a tape measure.

They are certainly straight-sided rims with no hooked edge.

if the rims had a hooked edge, then from what you all have told me, it seems that i would be able to use them.
however, no one has confirmed that these smaller width tires have worked on any straight-sided rims.

input?

Last edited by tspain; 09-21-10 at 09:49 PM.
tspain is offline   Reply With Quote
Old 09-22-10, 06:21 AM   #9
RavingManiac
Senior Member
 
RavingManiac's Avatar
 
Join Date: Jun 2010
Location: Maine
Bikes: 90 Raleigh Chill MTB, 92 Trek 1200, 2004 Trek 2300, 67 Sports, 70 Sports, 71 Philips, Lotus Challenger, 74 Super Course, Univega Gran Tourismo, Nishiki Seral
Posts: 552
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You can use those tires. They wil be fine as long as you use care when inflating. I run those tires on the same rims and inflate to 90lbs. with no problem. I wouldn't go over 90lbs.
RavingManiac is offline   Reply With Quote
Old 09-22-10, 06:43 AM   #10
LarDasse74
Guest
 
Join Date: Jul 2008
Location: Grid Reference, SK
Bikes: I never learned to ride a bike. It is my deepest shame.
Posts: 3,769
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Any 27" tires can be mounted on any 27" rims.

The difference will be in the width of the tire - 1-1/4 is slightly wider than 1-1/8, therefore it has a larger volume of air and provides more cushion to the rim, bike, and rider.

The main drawback is the need to run slightly higher pressure to avoid pinch flats.

LDSF
LarDasse74 is offline   Reply With Quote
Old 09-23-10, 01:23 AM   #11
deadringer
Livin' on E.
 
Join Date: Apr 2010
Location: south, CA
Bikes: Azuki 10 spd, Lygie 10 spd
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You will be fine, Ive used 27 X 1/14 and 27 1X 1/18 on my wheels marked 27 X 1 1/4. psi for the 1/4 was 90 and the psi for the 1/8 was 105 and im yet to have a problem with either of them. Same Araya rims also, no hooked side wall or anything, and I commute 250 miles a week. So you will be fine. good luck.
deadringer is offline   Reply With Quote
Old 05-24-12, 10:24 AM   #12
bobjpage
Senior Member
 
bobjpage's Avatar
 
Join Date: Jun 2009
Location: Charlotte, NC
Bikes:
Posts: 61
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Going in the other direction, I have a 1983 Fuji Touring Series IV, with the stock black/grey UKAI 27x 1 1/8" rims. The stock tires are 27x 1 1/8". The rims are notably narrower than our other bicycles, which use 27x 1 1/14" tires. I am considering the use of wider, 27x 1 1/4" tires. Will this work?
bobjpage is offline   Reply With Quote
Old 05-24-12, 10:29 AM   #13
Snydermann 
Lotus Monomaniac
 
Snydermann's Avatar
 
Join Date: Mar 2011
Location: Pennsylvania
Bikes:
Posts: 1,047
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by tspain View Post
The rims are labeled "ARAYA 27x1-1/4 w/o HP. JAPAN" and they say Shimano on the hub/axle(?).
The vast majority of entry to mid-level Lotus bikes came with 27x1-1/4 rims and 27x1-1/8 tires installed.
__________________
Always searching for Lotus literature and memorabilia for use at www.VintageLOTUSbicycles.com, can you help?
Snydermann is offline   Reply With Quote
Old 05-24-12, 10:45 AM   #14
3alarmer
Can'tre Member
 
3alarmer's Avatar
 
Join Date: Nov 2010
Location: The Big Tomato
Bikes: old ones
Posts: 13,898
Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 637 Post(s)
Quote:
Originally Posted by bobjpage View Post
Going in the other direction, I have a 1983 Fuji Touring Series IV, with the stock black/grey UKAI 27x 1 1/8" rims. The stock tires are 27x 1 1/8". The rims are notably narrower than our other bicycles, which use 27x 1 1/14" tires. I am considering the use of wider, 27x 1 1/4" tires. Will this work?
If they will clear the stays and bridges, etc., they will work fine.

I go up and down with regard to tire sizes all the time on new
(old used but new to me) bikes, and have yet to encounter a problem
that could not be solved bu adjusting pressure/tire width with
this one exception, i.e. if the tire is too wide to run through the
bike frame and brakes as configured.

It's true that certain width rims will hold a better tire profile and
contact patch for tires that are ideally matched for them regarding
width, but practically speaking, if your tire's bead is the correct
diameter for your rim's bead diameter, they'll usually work.

The difference between 27 x 1 1/8 and 27 x 1 1/4 is pretty insignificant,
and in fact all tires so labeled are not necessarily accurate in designation.
3alarmer is offline   Reply With Quote
Old 05-24-12, 01:17 PM   #15
Spld cyclist 
Senior Member
 
Spld cyclist's Avatar
 
Join Date: Nov 2011
Location: Springfield, MA
Bikes: 2012 Motobecane Fantom CXX, 2012 Motobecane Fantom CX, 1997 Bianchi Nyala, 200? Burley Rock 'n Roll
Posts: 1,063
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I used those tires on 27x1-1/4 rims and they were fine.
Spld cyclist is offline   Reply With Quote
Old 05-27-12, 08:54 PM   #16
bobjpage
Senior Member
 
bobjpage's Avatar
 
Join Date: Jun 2009
Location: Charlotte, NC
Bikes:
Posts: 61
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thank you 3alarmer.
bobjpage is offline   Reply With Quote
Old 05-28-12, 04:46 AM   #17
DannoXYZ 
Senior Member
 
DannoXYZ's Avatar
 
Join Date: Jul 2005
Location: Saratoga, CA
Bikes:
Posts: 11,600
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
In the old days, this was a non-issue and you could use any tyre with straight-side rims. That's because ALL tyres had steel beads like the Panaracer Pasela. The steel bead doesn't stretch and will retain its diameter up to about twice the rated maximum-pressure on a straight-side rim. Then in the '80s, along came kevlar-beaded tyres to save weight and allow folding convenience. These tyres DO stretch a little under pressure and must be paired with hook-edge rims in order to use them at maximum pressure.
DannoXYZ is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 01:32 PM.