Go Back  Bike Forums > Bike Forums > General Cycling Discussion
Reload this Page >

650b questions/27 inch conversion?

Notices
General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

650b questions/27 inch conversion?

Old 09-23-14, 05:18 PM
  #1  
Senior Member
Thread Starter
 
spinachface's Avatar
 
Join Date: Aug 2011
Location: Santa Cruz, CA
Posts: 73

Bikes: 1993 Bridgestone RB-1, Bianchi M.U.S.S, 1992 GT Bravado

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
650b questions/27 inch conversion?

After scouring Rivendell not for shopping purposes but just to ogle at what I can't afford, and I was introduced to the concept of 650b tires. Can't say I know much about them, but is there any true benefit to them? Would they make a bike ether suited for off road riding?

Other question: is it worth converting a bike that has 27 inch tires? Is there any true gain, or do I just gain access into the 650b club?
spinachface is offline  
Old 09-23-14, 05:27 PM
  #2  
Full Member
 
Join Date: May 2014
Posts: 409
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
Liked 32 Times in 24 Posts
The benefits: the club and room for fatter tires. I, for about 136 seconds, considered it just to be able to use the super cool Grand Bois Hetre tires.

Ive converted a couple 27" bikes to 700c and was able to fit 40 mm tires plus fenders. I don't think you'd be able to go much fatter with 650, and you'd be left with a brake reach problem.
MattoftheRocks is offline  
Old 09-23-14, 06:07 PM
  #3  
Senior Member
Thread Starter
 
spinachface's Avatar
 
Join Date: Aug 2011
Location: Santa Cruz, CA
Posts: 73

Bikes: 1993 Bridgestone RB-1, Bianchi M.U.S.S, 1992 GT Bravado

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by MattoftheRocks
Ive converted a couple 27" bikes to 700c and was able to fit 40 mm tires plus fenders. I don't think you'd be able to go much fatter with 650, and you'd be left with a brake reach problem.
That's kind of what I figured. Do you think even with Canti's I'd run into that problem?

Sounds like 700c might be a bit more reasonable of a conversion.
spinachface is offline  
Old 09-23-14, 06:18 PM
  #4  
Full Member
 
Join Date: May 2014
Posts: 409
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
Liked 32 Times in 24 Posts
Originally Posted by spinachface
That's kind of what I figured. Do you think even with Canti's I'd run into that problem?

Sounds like 700c might be a bit more reasonable of a conversion.
Yes. My last one was a Shogun canti bike and it took some maneuvering to get the pads to mate to the rims. My friend did the same thing with a Trek and it was a bit easier, his bosses are a couple mm's lower than the ones on my shogun. Perhaps going down to 26" you'd be able to use u brakes, but then you'll have the bb down a bit closer to the ground.
MattoftheRocks is offline  
Old 09-23-14, 06:22 PM
  #5  
Senior Member
Thread Starter
 
spinachface's Avatar
 
Join Date: Aug 2011
Location: Santa Cruz, CA
Posts: 73

Bikes: 1993 Bridgestone RB-1, Bianchi M.U.S.S, 1992 GT Bravado

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by MattoftheRocks
Yes. My last one was a Shogun canti bike and it took some maneuvering to get the pads to mate to the rims. My friend did the same thing with a Trek and it was a bit easier, his bosses are a couple mm's lower than the ones on my shogun. Perhaps going down to 26" you'd be able to use u brakes, but then you'll have the bb down a bit closer to the ground.
Oh man sounds like quite the hassle. Now I'm starting to look at my 27 inch rims with much more affection haha.
spinachface is offline  
Old 09-23-14, 06:28 PM
  #6  
Full Member
 
Join Date: May 2014
Posts: 409
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
Liked 32 Times in 24 Posts
Originally Posted by spinachface
Oh man sounds like quite the hassle. Now I'm starting to look at my 27 inch rims with much more affection haha.
Just borrow some 700 rims from somebody or pull out a ruler and measure 308mm from the axle and if that reaches the low end of the pad adjustment, then you're good.
MattoftheRocks is offline  
Old 09-23-14, 07:50 PM
  #7  
Senior Member
 
Join Date: May 2011
Location: Upstate NY
Posts: 3,783

Bikes: Bianchi San Mateo and a few others

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 634 Post(s)
Likes: 0
Liked 13 Times in 9 Posts
Originally Posted by MattoftheRocks
The benefits: the club and room for fatter tires.
Going to a smaller wheel size may allow you to run wider tires, but whether you need to drop down a wheel size to run wide tires depends on your particular frame and fork. On my old Peugeot UO-8, for example, I don't think I'd need to drop down from 27" to 700c, much less 650b, to run tires as wide as I'd like to go on a road bike.
SkyDog75 is offline  
Old 09-23-14, 10:16 PM
  #8  
Senior Member
 
Join Date: Mar 2007
Posts: 5,737
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 147 Post(s)
Likes: 0
Liked 8 Times in 8 Posts
650B allows you to fit fenders so you don't have to be a fair weather cyclist. You can turn a road bike into a commuter bike by going to a smaller wheel size with wider tires.
NormanF is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bwilli88
Classic & Vintage
107
11-08-16 09:31 PM
Scarbo
General Cycling Discussion
48
10-31-16 10:24 AM
nazcalines
Classic & Vintage
15
10-14-13 01:55 AM
lungimsam
Bicycle Mechanics
17
06-30-12 10:09 AM
corwin1968
Bicycle Mechanics
14
11-07-11 11:26 AM

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.