Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Sneak Preview: 27" to 650B conversion (pic intensive)

Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Sneak Preview: 27" to 650B conversion (pic intensive)

Old 01-27-11, 09:24 PM
  #1  
southpawboston
Senior Member
Thread Starter
 
southpawboston's Avatar
 
Join Date: Aug 2008
Location: Somerville, MA and Catskill Mtns
Posts: 4,138
Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Liked 126 Times in 60 Posts
Sneak Preview: 27" to 650B conversion (pic intensive)

I picked up this 24.5" Shogun 1500 touring bike for a song on eBay after a long search for a tourer in my size:



The bike fits great, but has an absurdly high bottom bracket. I also noticed that the geometry was slightly different than my 23" Shogun 2000, which I had assumed was otherwise identical: both have the same head tube and seat tube angles, and the TT shares the same proportion to the ST. Both bikes were made for 27" wheels and came stock with 27 x 1-1/4" tires. However, to my surprise the 1500 has significantly more clearance between the chain stays (about 48mm), and a wider fork crown (also about 48mm). Well, you can imagine the light bulb moment I had when I put "clearance" and "high BB" together: perfect candidate for 650B conversion!

I didn't care about the paint and the bike holds no historical value, so I thought about PCing, and the powder coater I wanted to use is also a local frame builder. So we talked a bit, and we put together a list of modifications to do before PCing: relocate the canti studs, lower the brake bridge, add some bottle mounts, and drill some holes for internal routing of dynamo wires. The price was reasonable for all of this, because I ended up parting out the bike and having a free frame plus a little extra. So, I figured I'd take the gamble.

Here is a sneak preview... so far everthing is bolting up great... I was worried the VO Zeppelin fenders wouldn't fit, or that I'd have to file them, and that the 42mm Hetres that I had planned for the build wouldn't clear. Not the case:



I used Peter Weigle's trick of dimpling the fenders so that they can pass through the chainstays without filing:





Brake bridge is the perfect height for fat tires and fenders, without the need for spacers or bracket:





Next step is to dimple the front fender to fit between the fork blades. Then everything else will bolt right up.

Last edited by southpawboston; 01-27-11 at 09:30 PM.
southpawboston is offline  
Old 01-27-11, 09:37 PM
  #2  
stien
neits
 
stien's Avatar
 
Join Date: Apr 2010
Location: Cape Cod, MA
Posts: 1,665
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Aww hell yeah that looks epic already. I love the color scheme.
stien is offline  
Old 01-27-11, 09:38 PM
  #3  
jstewse
Senior Member
 
jstewse's Avatar
 
Join Date: Aug 2009
Posts: 218
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Very cool, took advantage of VO's sale on those zeppelin fenders? They look great with the Hetre's and it looks like everything fits just about perfectly.
I'm looking forward to seeing more pictures.
jstewse is offline  
Old 01-27-11, 09:42 PM
  #4  
fender1
Senior Member
 
fender1's Avatar
 
Join Date: Jan 2006
Location: Berwyn PA
Posts: 6,095

Bikes: I hate bikes!

Mentioned: 35 Post(s)
Tagged: 0 Thread(s)
Quoted: 295 Post(s)
Liked 140 Times in 52 Posts
It looks great so far. Isn't nice when you take a risk and it works out better than originally thought? Can't wait to see the finished bike!
fender1 is offline  
Old 01-27-11, 09:43 PM
  #5  
Grim
Senior Member
 
Grim's Avatar
 
Join Date: Jun 2008
Location: Atlanta
Posts: 2,993

Bikes: Cannondale T700s and a few others

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
NICE!
I have been looking at Peters Flicker for the last few days drooling over his bikes.

I have a dim flickering light bulb that when I get the 27's wore out (they were brand new when I bought the bike) on the Raleigh that's not a Raleigh with the high flange Records (but mismatched rims) that I might look at lacing it with 650's instead of 700's.

Look forward to seeing the finished product. It may well push me over the edge and have me ordering up some Grand Bois tires and 650 Diagonale from VO.


.
Grim is offline  
Old 01-27-11, 09:45 PM
  #6  
gomango 
Senior Member
 
Join Date: Jul 2006
Location: STP
Posts: 15,160
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quoted: 798 Post(s)
Liked 159 Times in 105 Posts
Go get 'em.

I love your projects, as they always are first rate.

Top notch fender work. After going through an install of Berthouds on my Bruce Gordon, I'm watching and learning.

Super clean install you've got there.

This looks like another winner. Bring on the big pics.
gomango is offline  
Old 01-27-11, 09:47 PM
  #7  
Chris W.
Senior Member
 
Chris W.'s Avatar
 
Join Date: Jul 2008
Location: Nampa Idaho
Posts: 1,084

Bikes: 76' Centrurion Pro-Tour, 86' Specialized Rock Hopper, 88' Centurion Iron Man, 89' Bruce Gordon "Hikari", 95' Rock Hopper Ultra.

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
Very cool!!! Can't wait to see the finished bike.

Cheers,
Chris
Chris W. is offline  
Old 01-27-11, 09:48 PM
  #8  
rothenfield1
Senior Member
 
rothenfield1's Avatar
 
Join Date: Jun 2009
Location: Montereyish
Posts: 2,329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
That's it; I'll just have to admit it, my stuff is never going to look this good. Last post, I'm done!
rothenfield1 is offline  
Old 01-27-11, 09:50 PM
  #9  
ColonelJLloyd 
Senior Member
 
ColonelJLloyd's Avatar
 
Join Date: Dec 2009
Location: Louisville
Posts: 8,382
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 109 Post(s)
Liked 6 Times in 5 Posts
Wow! That bike is a looker, Anton! The color combination doesn't get much classier. Can't wait to see more.
__________________
Bikes on Flickr
I prefer email to private messages. You can contact me at justinhughes@me.com
ColonelJLloyd is offline  
Old 01-28-11, 09:01 AM
  #10  
auchencrow
Senior Member
 
auchencrow's Avatar
 
Join Date: Apr 2009
Location: Detroit
Posts: 10,327
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 9 Times in 7 Posts
You are one awesome builder, Southpaw! I can't wait to see the end result.
__________________
- Auchen
auchencrow is offline  
Old 01-28-11, 09:27 AM
  #11  
nlerner
Senior Member
 
Join Date: Dec 2005
Posts: 14,268
Mentioned: 343 Post(s)
Tagged: 0 Thread(s)
Quoted: 2198 Post(s)
Liked 1,779 Times in 923 Posts
Looking very nice, Anton. What did you use as a form to shape those fender ends? I was trying to do something similar lately, but didn't have the right shaped surface as a base.

Neal
nlerner is offline  
Old 01-28-11, 09:43 AM
  #12  
southpawboston
Senior Member
Thread Starter
 
southpawboston's Avatar
 
Join Date: Aug 2008
Location: Somerville, MA and Catskill Mtns
Posts: 4,138
Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Liked 126 Times in 60 Posts
Originally Posted by nlerner View Post
Looking very nice, Anton. What did you use as a form to shape those fender ends? I was trying to do something similar lately, but didn't have the right shaped surface as a base.

Neal
I'll snap some photos of my wood form and post them. I had a scrap of wooden clothes rod laying around, and it was the same diameter as the chainstays. I used that as the hammer. Then I drilled the same diameter hole with a hole say into a scrap piece of 2x4. I drilled the hole at an angle. Next, I used a miter saw to bisect the 2x4 through the hole. The resulting sawed edge of the 2x4 had a semi-circular channel running through it. The wooden dowel, being concentric with the channel, mated perfectly to it. I propped the fender onto this edge, and used a rubber mallet to whack the dowel against the fender. The fender bent to the conformation of the channel. It's hard to picture the form, but a picture is worth a thousand words... I'll post tonight.

Oh, and I'd practice on an old fender first! The first form I made had way too deep of a channel. When you bisect the hole in the 2x4, you need to do it asymmetrically, so that the channel left behind on one side is only a couple of mm deep... that represents the depth of the resulting dimple.

Oh, and this assumes that your chainstays are round, and they're usually not... they're either oval, or flattened on the inside face. So, come creative filing of that channel may be required. Essentially you want it to be the mirror image inside shape of the stay. I didn't get that fancy with my form.
southpawboston is offline  
Old 01-28-11, 09:44 AM
  #13  
ScottRyder 
Photographer
 
ScottRyder's Avatar
 
Join Date: May 2006
Location: The other Cape, Cape Ann
Posts: 3,146
Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 96 Post(s)
Liked 86 Times in 46 Posts
Great so far Anton, can't wait to see it in the spring.

Scott
__________________
ClassicFuji.posthaven.com.archive

IG @scottrydercycling
IG @scottryderphoto























ScottRyder is offline  
Old 01-28-11, 09:48 AM
  #14  
brockd15 
Senior Member
 
brockd15's Avatar
 
Join Date: Dec 2008
Location: Conroe, TX
Posts: 1,620
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Likes: 0
Liked 4 Times in 3 Posts
Originally Posted by southpawboston View Post
It's hard to picture the form, but a picture is worth a thousand words... I'll post tonight.
Amen! I need a picture.
I'm curious to see how your bike turns out. Junkfoodjunkie picked up a Sekine SHT for me that I have similar plans for...650b, red Hetres, fenders, etc. And it's about the same color as yours. We may end up with twins.
brockd15 is offline  
Old 01-28-11, 09:52 AM
  #15  
southpawboston
Senior Member
Thread Starter
 
southpawboston's Avatar
 
Join Date: Aug 2008
Location: Somerville, MA and Catskill Mtns
Posts: 4,138
Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Liked 126 Times in 60 Posts
Originally Posted by brockd15 View Post
Amen! I need a picture.
I'm curious to see how your bike turns out. Junkfoodjunkie picked up a Sekine SHT for me that I have similar plans for...650b, red Hetres, fenders, etc. And it's about the same color as yours. We may end up with twins.
Haha, yeah, I was thinking of PCing the Shogun Malteni Orange and then swapping it for Neal's Ebisu when he's not looking...
southpawboston is offline  
Old 01-28-11, 10:02 AM
  #16  
sauze
Senior Member
 
sauze's Avatar
 
Join Date: May 2010
Location: Winnipeg
Posts: 950
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked 3 Times in 3 Posts
Really excited to see this one finished, also brockd15 I'd love to see lots of pics of the Sekine build eventually. I'm going to get my hands on one soon enough and a 650b conversion would be neat.
sauze is offline  
Old 01-28-11, 10:03 AM
  #17  
Amesja
Cottered Crank
 
Amesja's Avatar
 
Join Date: Aug 2010
Location: Chicago
Posts: 3,493

Bikes: 1954 Raleigh Sports 1974 Raleigh Competition 1969 Raleigh Twenty 1964 Raleigh LTD-3

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 3 Times in 2 Posts
Beautiful old-world craftsmanship. Your fender mounting is a work of art.

The color scheme with those tires combined with the aluminum fender and the powdercoat is breathtaking. I can't wait to see the finished bike. I want to see what seat you choose, bar tape, cable-housings, and how it all fits in together. It seems like you have an artist's vision and a craftsman's soul. I'm excited about the next installment.
Amesja is offline  
Old 01-28-11, 10:08 AM
  #18  
tugrul
Senior Member
 
tugrul's Avatar
 
Join Date: Jul 2009
Location: Portsmouth, NH
Posts: 2,437
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 5 Times in 3 Posts
Originally Posted by Scottryder View Post
Great so far Anton, can't wait to see it in the spring.
+1 Wow
tugrul is offline  
Old 01-28-11, 10:34 AM
  #19  
ColonelJLloyd 
Senior Member
 
ColonelJLloyd's Avatar
 
Join Date: Dec 2009
Location: Louisville
Posts: 8,382
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 109 Post(s)
Liked 6 Times in 5 Posts
Originally Posted by Amesja View Post
Beautiful old-world craftsmanship. Your fender mounting is a work of art.

The color scheme with those tires combined with the aluminum fender and the powdercoat is breathtaking. I can't wait to see the finished bike. I want to see what seat you choose, bar tape, cable-housings, and how it all fits in together. It seems like you have an artist's vision and a craftsman's soul. I'm excited about the next installment.
Agreed. He obviously is adept at fabrication. Perhaps not a constructeur, but a fabricateur!

Have you chosen racks for it, Anton?
__________________
Bikes on Flickr
I prefer email to private messages. You can contact me at justinhughes@me.com
ColonelJLloyd is offline  
Old 01-28-11, 10:42 AM
  #20  
-holiday76
No one cares
 
-holiday76's Avatar
 
Join Date: Jan 2008
Location: Yardley, Pa
Posts: 6,134
Mentioned: 38 Post(s)
Tagged: 0 Thread(s)
Quoted: 220 Post(s)
Liked 53 Times in 40 Posts
thats going to be friggin awesome! too bad VO fenders suck so bad...
__________________
I prefer emails to private messages - holiday76@gmail.com
Jack Taylor Super Tourer Tandem (FOR SALE), Jack Taylor Tour of Britain, Px-10, Carlton Flyer, Fuji The Finest, Salsa Fargo, Santa Cruz Tallboy, Carver All-Road .


-holiday76 is offline  
Old 01-28-11, 10:48 AM
  #21  
Roger M 
Senior Member
 
Roger M's Avatar
 
Join Date: May 2010
Location: Snohomish, WA.
Posts: 2,289
Mentioned: 17 Post(s)
Tagged: 0 Thread(s)
Quoted: 159 Post(s)
Liked 290 Times in 115 Posts
Great attention to detail, SPB. Did the brake bridge already have the mounting boss for the fender, or is that something you added? Regardless, that sure makes for a very clean looking install.

As others have mentioned, I am looking forward to the finished bike. Very,very nice.
Roger M is offline  
Old 01-28-11, 10:50 AM
  #22  
nlerner
Senior Member
 
Join Date: Dec 2005
Posts: 14,268
Mentioned: 343 Post(s)
Tagged: 0 Thread(s)
Quoted: 2198 Post(s)
Liked 1,779 Times in 923 Posts
Originally Posted by southpawboston View Post
Haha, yeah, I was thinking of PCing the Shogun Malteni Orange and then swapping it for Neal's Ebisu when he's not looking...
Hah! But it's the wrong size!

Neal
nlerner is offline  
Old 01-28-11, 11:08 AM
  #23  
jptwins
Senior Member
 
jptwins's Avatar
 
Join Date: Dec 2008
Location: Jamaica Plain, MA
Posts: 186

Bikes: Boulder AllRoad67cm; 1990 Nobilette 65cm;Fuji S12-S LTD 63cm; xtracycle; panasonic gran tourer 68cm

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Looking great! Beautiful paint job and goes great with the tires!

Originally Posted by southpawboston View Post
Oh, and I'd practice on an old fender first! The first form I made had way too deep of a channel. When you bisect the hole in the 2x4, you need to do it asymmetrically, so that the channel left behind on one side is only a couple of mm deep... that represents the depth of the resulting dimple.
You were lucky to have me and my fenders as your sample, right? You definitely improved on what we did on my wife's bike. And I definitely echo what Anton said: only hammer a little bit and try it out -- you can always hammer a little more!
jptwins is offline  
Old 01-28-11, 11:17 AM
  #24  
southpawboston
Senior Member
Thread Starter
 
southpawboston's Avatar
 
Join Date: Aug 2008
Location: Somerville, MA and Catskill Mtns
Posts: 4,138
Mentioned: 29 Post(s)
Tagged: 0 Thread(s)
Quoted: 66 Post(s)
Liked 126 Times in 60 Posts
Originally Posted by ColonelJLloyd View Post
Agreed. He obviously is adept at fabrication. Perhaps not a constructeur, but a fabricateur!

Have you chosen racks for it, Anton?
You forgot poseur, imposteur, hoseur... I'm all of those, too!

For now it will only have a front rando rack. I got the VO passhunter, and have bent the rack struts to fit the 650B-modified fork! I think it's going to fit okay...


Originally Posted by jptwins View Post
You were lucky to have me and my fenders as your sample, right? You definitely improved on what we did on my wife's bike. And I definitely echo what Anton said: only hammer a little bit and try it out -- you can always hammer a little more!
Oh, yeah, I didn't mention that JPtwins' wife's bike was the test mule for this strategy! But actually, don't you think her bike came out nicely JPT?

Originally Posted by nlerner View Post
Hah! But it's the wrong size!
I was planning on calling Hiroshi and telling him I had a growth spurt, and asking if he'd trade the frame a new one in my size. But now that you're on to my devious plot I'm sure you'll be guarding your bike much more closely!

Last edited by southpawboston; 01-28-11 at 11:26 AM.
southpawboston is offline  
Old 01-28-11, 11:36 AM
  #25  
nlerner
Senior Member
 
Join Date: Dec 2005
Posts: 14,268
Mentioned: 343 Post(s)
Tagged: 0 Thread(s)
Quoted: 2198 Post(s)
Liked 1,779 Times in 923 Posts
Originally Posted by southpawboston View Post
I was planning on calling Hiroshi and telling him I had a growth spurt, and asking if he'd trade the frame a new one in my size. But now that you're on to my devious plot I'm sure you'll be guarding your bike much more closely!
Fortunately, access to my basement is a bit compromised by snow right now--and probably until March!

Neal
nlerner is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.