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 08-26-04, 11:54 PM   #1
ben trim
Member
Thread Starter
 
ben trim's Avatar
 
Join Date: Aug 2004
Location: Zoo Town
Bikes: '05 Giant T-1, '98 Lightspeed Tuscany, '95 Ritchey P22, 80's Motobecane
Posts: 37
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
27 vs 700, how much difference?

I'm new here so I hope this is not a dumb or faq. I didn't find it by search except 7/22/04 hook rim discussion.
I have a road bike with 27" wheels. One rim is bent beyond fixing by LBS. I'd like to try wheelbuilding. Can I replace the 27 w a 700 rim, new spokes and my old hub? Shopping online I don't see any 27 rims. Any problem with brakes or frame fit? Thanks
ben trim is offline   Reply With Quote
Old 08-26-04, 11:58 PM   #2
Raiyn
I drink your MILKSHAKE
 
Raiyn's Avatar
 
Join Date: Jul 2002
Location: St. Petersburg, FL
Bikes: 2003 Specialized Rockhopper FSR Comp, 1999 Specialized Hardrock Comp FS, 1971 Schwinn Varsity
Posts: 15,061
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
700 vs. 27?
To answer your question no you can't replace the rim with a 700c your brakes won't reach
__________________
Raiyn is offline   Reply With Quote
Old 08-27-04, 01:02 AM   #3
ben trim
Member
Thread Starter
 
ben trim's Avatar
 
Join Date: Aug 2004
Location: Zoo Town
Bikes: '05 Giant T-1, '98 Lightspeed Tuscany, '95 Ritchey P22, 80's Motobecane
Posts: 37
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks. I see here http://www.sheldonbrown.com/tire_sizing.html that the ISO bead seat diameter is 8 mm smaller for a 700C vs 27" . Like you said.
I don't like the shape of the replacement 27" wheelset I got at the LBS. The 27x1 1/8 tire is close for the chainstay space but narrow for the rim. Know of a source for 27" rims?
Thanks again.
ben trim is offline   Reply With Quote
Old 08-27-04, 01:10 AM   #4
shecky
Senior Member
 
shecky's Avatar
 
Join Date: Nov 2003
Location: Home of the Homeless
Bikes: Rustbuckets, the lot of them.
Posts: 610
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Nashbar sells a inexpensive single wall 27" rim. I've used one for a long time with no problems.

Bikeman also has Sun CR-18 rims in 27".
shecky is offline   Reply With Quote
Old 08-27-04, 05:48 AM   #5
capsicum
Evil Genius
 
capsicum's Avatar
 
Join Date: May 2004
Location: Sumner, WA
Bikes: '92 novara ponderosa, '74 schwinn le tour, Novara fusion, novara transfer, novara randonee(2), novara careema pro, novara bonita(2).
Posts: 1,529
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Raiyn
700 vs. 27?
To answer your question no you can't replace the rim with a 700c your brakes won't reach
Actualy it depends on that particular bike's brakes. It is only a 4mm difference from the axle/fork tip.
capsicum is offline   Reply With Quote
Old 08-27-04, 07:06 AM   #6
sydney
Senior Member
 
sydney's Avatar
 
Join Date: Jan 2004
Bikes:
Posts: 9,428
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Raiyn
700 vs. 27?
To answer your question no you can't replace the rim with a 700c your brakes won't reach
Sometomes they will.It depends on how much adjustment there is in the pads.
sydney is offline   Reply With Quote
Old 08-27-04, 12:37 PM   #7
halfspeed
Senior Member
 
halfspeed's Avatar
 
Join Date: Nov 2003
Location: SE Minnesota
Bikes: are better than yours.
Posts: 12,276
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ben trim
Thanks. I see here http://www.sheldonbrown.com/tire_sizing.html that the ISO bead seat diameter is 8 mm smaller for a 700C vs 27" . Like you said.
I don't like the shape of the replacement 27" wheelset I got at the LBS. The 27x1 1/8 tire is close for the chainstay space but narrow for the rim. Know of a source for 27" rims?
Thanks again.
Sun's CR18 is readily available as a 27" rim. If you want a narrower rim, Sun's M13 II is available at bikepartsusa. The 27" Nashbar rim is a rebranded Alex x404 which Alex sells as an OEM rim for cheap hybrids. It's really not very good and hard to get tensioned correctly when building, partly because it doesn't have nipple eyelets.
halfspeed is offline   Reply With Quote
Old 08-27-04, 02:06 PM   #8
bluesref
Member
 
Join Date: Jun 2003
Location: So Tier NY
Bikes:
Posts: 48
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I just swapped out a 27" with 700 on my old Lotus. OK I guess the Old Weinnman's are Long reach. I dropped the shoes down to gee alomost half way down in the calipers.

So it may fit depening on the rim height and the brake reach.

Good luck.
bluesref is offline   Reply With Quote
Old 08-27-04, 03:40 PM   #9
little5guy
Senior Member
 
little5guy's Avatar
 
Join Date: Aug 2004
Location: Portland, Oregon
Bikes: 95 GT Force, 95 Gary Fisher Hookooekoo, 75 Takara fixie
Posts: 143
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ben trim
I'm new here so I hope this is not a dumb or faq. I didn't find it by search except 7/22/04 hook rim discussion.
I have a road bike with 27" wheels. One rim is bent beyond fixing by LBS. I'd like to try wheelbuilding. Can I replace the 27 w a 700 rim, new spokes and my old hub? Shopping online I don't see any 27 rims. Any problem with brakes or frame fit? Thanks

700c rims (standard road rims for modern bikes) are slightly smaller in diamater than 27 inch rims, so I would not recommend having one 27 inch and the other 700c. Also, because of the smaller diameter wheel, you will need to be sure your brakes reach down to the 700c wheels. On an older road bike this is likely to be a problem; older bikes require brakes with a longer reach. Your best bet would be to take the bike to a bike shop and have them test out the brakes with 700c wheels. I recently bought some brakes on ebay I cannot use because they do not reach far enough.

Finally, your old hub with properly sized spokes will work on a 700c rim, but still you will have mis-matched wheels on the bike. And as I understand you need some specialized (read: expensive) tools to build a wheel, so you may want to chat with your LBS about that--perhaps you can borrow their shop for a modest fee. And you may want to ask your LBS or look more on the web for 27 inch wheels because I have seen some. The selection is not as great as for 700c, but they are out there.

good luck.
little5guy is offline   Reply With Quote
Old 08-27-04, 10:03 PM   #10
PGZX3
~OPSEC~
 
Join Date: Jun 2004
Location: Shreveport, LA
Bikes: GT Timberline (mtb) and Haro Backtrail (bmx)
Posts: 391
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
wheel building for me always has and always will consist of the proper spoke wrench, proper spokes and guage correct nipples, and starting off with no brakes on whatever dropout the wheel is going into and using the frame and brakes as a stand. Has worked for dozens of wheels for me, worth a shot and FAR from expensive on the tool side (only a spoke wrench need apply!!)
PGZX3 is offline   Reply With Quote
Old 08-28-04, 01:17 AM   #11
TechJD
Senior Member
 
TechJD's Avatar
 
Join Date: Jul 2004
Bikes:
Posts: 229
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
http://www.bikepartsusa.com
they carrie some 27's including Weinnman
TechJD 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 01:47 AM.