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

The Brompton Fixie Project

Notices
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.

The Brompton Fixie Project

Old 08-20-09, 04:43 AM
  #1  
Lewis Butler
Senior Member
Thread Starter
 
Join Date: Feb 2009
Location: Melbourne, Australia
Posts: 81

Bikes: Brompton T6, Ganna Italian Gentleman's Bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
The Brompton Fixie Project



So the time has finally come to unveil the bike I've been dreaming about for the last year or so. Taking LittlePixel's idea, I've cooked up my own version of a fixed-wheel Brompton.

Starting with a 2009 S1E Brompton in clear laquer, I built a wheelset around Velocity Aerohead rims with a Phil Wood hub at the rear and a Pantour suspension hub at the front. I'm running on slick Schwalbe Stelvio tyres.

I'm running a cut-down Soma Noah's Arc bar, clad in Velo Orange elkhide leather sleeves matched up with a Brooks Team Pro Classic saddle.





I went with the standard Brompton 54T crankset and a Soma 12T track cog which gives about 70" with my ISO 349 wheels. I'm running a gold coloured YBN half-link chain which allows me to get chain tension and I've modified the Brompton chain tensioner's parts & placement somewhat to make it all work under back-pedalling loads.

I have detachable MKS MM-Cube EZY clipless pedals and a slightly modified Planet Bike Stealth Superflash rear light (attached with a Vistalite Cue light quick-release mount) to finish off. I'm running just a single brake with the addition of Kool Stop salmon pads.

Lewis Butler is offline  
Old 08-20-09, 04:53 AM
  #2  
PDR
Senior Member
 
Join Date: Jan 2008
Location: Cheshire, North West England, UK
Posts: 574

Bikes: Brompton S2L-X, Bridgestone Moulton, 1963 & 1966 Moultons, Scott Mountain bike

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
That looks interesting, certainly the best colour
Can we please have some photos of the whole bike?
PDR is offline  
Old 08-20-09, 06:09 AM
  #3  
bykerouac
I Fold
 
bykerouac's Avatar
 
Join Date: Sep 2004
Posts: 269
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Beautiful! How do the Eneloops fare in the SuperFlash? If I may make a suggestion, add a V-brake noodle to the brake line to enhance braking a bit.
Great job!
bykerouac is offline  
Old 08-20-09, 05:28 PM
  #4  
Lewis Butler
Senior Member
Thread Starter
 
Join Date: Feb 2009
Location: Melbourne, Australia
Posts: 81

Bikes: Brompton T6, Ganna Italian Gentleman's Bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by bykerouac View Post
Beautiful! How do the Eneloops fare in the SuperFlash?
Seem to be working just fine.
Lewis Butler is offline  
Old 08-20-09, 09:27 PM
  #5  
ChiapasFixed
hipster traffic dodger
 
ChiapasFixed's Avatar
 
Join Date: Dec 2007
Posts: 596

Bikes: IRO Mark V Pro, home made bamboo track bike, eddy merckx corsa extra, Airnimal Joey commute, UGADA Tikit

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
more pics plz!
ChiapasFixed is offline  
Old 08-20-09, 10:02 PM
  #6  
Joako
Senior Member
 
Join Date: Jul 2008
Posts: 262
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Very nice. How is the chainline?
Joako is offline  
Old 08-20-09, 10:06 PM
  #7  
ddez
Senior Member
 
Join Date: Jul 2009
Location: Alberta,Canada.
Posts: 800
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Yes me too.I would really like to see that cut down bar,im looking for a different bar for my S1E.
ddez is offline  
Old 08-21-09, 10:14 AM
  #8  
LittlePixel
Raleigh20 PugFixie, Merc
 
LittlePixel's Avatar
 
Join Date: Sep 2004
Location: London UK
Posts: 1,997

Bikes: 1982 Raleigh Twenty Hotrod Fixie; 1984 Peugeot Premier Fixie, 2007 Merc Lightweight folder

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked 2 Times in 2 Posts
YES! This is fantastic work... How's the ride?
LittlePixel is offline  
Old 08-21-09, 10:58 AM
  #9  
mup24
Member
 
Join Date: Jul 2008
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
As a fixed gear Tikit owner and lover I have to say this bike is super cool. Great work. As Chiapas said, more pics please!
mup24 is offline  
Old 08-22-09, 08:27 PM
  #10  
Lewis Butler
Senior Member
Thread Starter
 
Join Date: Feb 2009
Location: Melbourne, Australia
Posts: 81

Bikes: Brompton T6, Ganna Italian Gentleman's Bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Update with some photos:


One unexpected result of running Stelvios & no mudguards is that when the bike is parked it can be pushed along on it's wheels:


Maybe I could use a V-brake noodle:


The cut down bar, covered with leather:


Rear hub, spaced 3mm out so that the fixie lockring doesn't foul the chain tensioner:
Lewis Butler is offline  
Old 08-22-09, 08:30 PM
  #11  
Lewis Butler
Senior Member
Thread Starter
 
Join Date: Feb 2009
Location: Melbourne, Australia
Posts: 81

Bikes: Brompton T6, Ganna Italian Gentleman's Bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Joako View Post
Very nice. How is the chainline?
Seems to be straight enough, I haven't had any chain-drops whilst riding.

Originally Posted by LittlePixel View Post
YES! This is fantastic work... How's the ride?
Fast and fun. Given it's winter here in Melbourne I'm getting wet on my commute :-(
Lewis Butler is offline  
Old 08-23-09, 04:49 AM
  #12  
LittlePixel
Raleigh20 PugFixie, Merc
 
LittlePixel's Avatar
 
Join Date: Sep 2004
Location: London UK
Posts: 1,997

Bikes: 1982 Raleigh Twenty Hotrod Fixie; 1984 Peugeot Premier Fixie, 2007 Merc Lightweight folder

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked 2 Times in 2 Posts
Thanks for the detail shots!
A noodle goes great there - I did it before I changed to Campag brakes w. drop bolts.
What Phil Wood hub is that? looks like a flip-flop. Mine is a Kierin Japanese track spec on with threading on one side only (I thought it was the only hub that would fit the 120mm dropouts. Does that mean your wheel is dished or not?
Great bike - nice in raw lacquer too..
LittlePixel is offline  
Old 08-23-09, 04:52 AM
  #13  
LittlePixel
Raleigh20 PugFixie, Merc
 
LittlePixel's Avatar
 
Join Date: Sep 2004
Location: London UK
Posts: 1,997

Bikes: 1982 Raleigh Twenty Hotrod Fixie; 1984 Peugeot Premier Fixie, 2007 Merc Lightweight folder

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked 2 Times in 2 Posts
oh yeah - i also meant to ask how you fixed the interface with the phil allen head bolt and the recess in the chain tensioner... i got a part made - but maybe you just used spacer washers?...
LittlePixel is offline  
Old 08-23-09, 06:54 PM
  #14  
ChiapasFixed
hipster traffic dodger
 
ChiapasFixed's Avatar
 
Join Date: Dec 2007
Posts: 596

Bikes: IRO Mark V Pro, home made bamboo track bike, eddy merckx corsa extra, Airnimal Joey commute, UGADA Tikit

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
hmm, I thought most, if not all track hubs were spaced 120mm, even if they are flip-flop?
Once again Lewis, that is a really nice ride, thanks for the pics!
ChiapasFixed is offline  
Old 08-24-09, 07:31 PM
  #15  
LittlePixel
Raleigh20 PugFixie, Merc
 
LittlePixel's Avatar
 
Join Date: Sep 2004
Location: London UK
Posts: 1,997

Bikes: 1982 Raleigh Twenty Hotrod Fixie; 1984 Peugeot Premier Fixie, 2007 Merc Lightweight folder

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked 2 Times in 2 Posts
My Brompton's rear spacing is actually 110mm (ignore my earlier post - dimension mistake ahoy!) which is why I didn't consider more easily available 'usual' 120mm hubs and went for a 110 Keirin hub. I guess the original poster did a bit of cold setting? Am I right?
LittlePixel is offline  
Old 08-24-09, 08:19 PM
  #16  
stevegor
Senior Member
 
stevegor's Avatar
 
Join Date: Dec 2006
Location: Oz
Posts: 2,117

Bikes: lots... even a Raleigh twenty !!!

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 2 Times in 1 Post
Very nice bike, well done.

Nice to see another Aussie who has the SWB bug.

PS: Drops would look nice IMHO.
stevegor is offline  
Old 08-27-09, 04:36 AM
  #17  
Lewis Butler
Senior Member
Thread Starter
 
Join Date: Feb 2009
Location: Melbourne, Australia
Posts: 81

Bikes: Brompton T6, Ganna Italian Gentleman's Bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by LittlePixel View Post
My Brompton's rear spacing is actually 110mm (ignore my earlier post - dimension mistake ahoy!) which is why I didn't consider more easily available 'usual' 120mm hubs and went for a 110 Keirin hub. I guess the original poster did a bit of cold setting? Am I right?
Hi Pixel, I'm using at 110mm spaced hub too so no cold setting here. After reading your comments about having to dish your wheel I thought I'd try to avoid that.

The beautiful thing about Phil Wood is that they'll pretty much sell you anything you want (at a price), I have an AVL412 in case anyone is curious, I'm pretty sure that Pixel is using an AVL411.

Originally Posted by LittlePixel View Post
oh yeah - i also meant to ask how you fixed the interface with the phil allen head bolt and the recess in the chain tensioner... i got a part made - but maybe you just used spacer washers?...
After reading about your issues with this I was a little afraid but it was really easy. .. The knurled washer that the allen bolt goes through fitted really snugly in the Brompton chain tensioner, I think I might have needed a 3mm axle spacer to pad it out and then I used a standard Brompton washer before the allen bolt went through the lot.
Lewis Butler is offline  
Old 08-27-09, 08:14 PM
  #18  
ChiapasFixed
hipster traffic dodger
 
ChiapasFixed's Avatar
 
Join Date: Dec 2007
Posts: 596

Bikes: IRO Mark V Pro, home made bamboo track bike, eddy merckx corsa extra, Airnimal Joey commute, UGADA Tikit

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
so, can you skid with this settup? how does backpedaling feel? how is the tensioner holding up?
ChiapasFixed is offline  
Old 08-28-09, 01:50 AM
  #19  
Sammyboy
The Legitimiser
 
Sammyboy's Avatar
 
Join Date: Jul 2005
Location: Southampton, UK
Posts: 4,849

Bikes: Gazelle Trim Trophy, EG Bates Track Bike, HR Bates Cantiflex bike, Nigel Dean fixed gear conversion, Raleigh Royal, Falcon Westminster.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 4 Times in 3 Posts
I like this very, very much.
Sammyboy is offline  
Old 08-28-09, 03:01 PM
  #20  
Lewis Butler
Senior Member
Thread Starter
 
Join Date: Feb 2009
Location: Melbourne, Australia
Posts: 81

Bikes: Brompton T6, Ganna Italian Gentleman's Bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by ChiapasFixed View Post
so, can you skid with this settup? how does backpedaling feel? how is the tensioner holding up?
I haven't tried skidding, being new to fixed it just seems like a way to trash tyres and look cool doing it. am I wrong?

Backpedaling feels good, I have been learning to ride backwards :-)

There is a small amount of take up in the chain tensioner and it seems to be holding up OK under the punishment I'm giving it.
Lewis Butler is offline  
Old 08-28-09, 07:45 PM
  #21  
>>ECB<<
Senior Member
 
Join Date: Nov 2008
Posts: 69
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Lewis Butler View Post
...
Maybe I could use a V-brake noodle:

...
Something I'm curious about--what's that cut-down-circle, galvanized-steel-looking thing on the left stay, with the screw through the middle? A generator mount, maybe?

ECB
>>ECB<< is offline  
Old 08-28-09, 11:12 PM
  #22  
Lewis Butler
Senior Member
Thread Starter
 
Join Date: Feb 2009
Location: Melbourne, Australia
Posts: 81

Bikes: Brompton T6, Ganna Italian Gentleman's Bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by >>ECB<< View Post
Something I'm curious about--what's that cut-down-circle, galvanized-steel-looking thing on the left stay, with the screw through the middle? A generator mount, maybe?

ECB
Interesting you ask, ECB. These parts were floating around on the bottom of my bike box when I took delivery of it. I e-mailed Brompton tech support as I wasn't sure, here is their response:

"This disc is fitted to E-Type (bikes with no mudguards) bikes to stop the front brake cable contacting the tyre when the bars are turned."
Lewis Butler is offline  
Old 08-30-09, 11:59 PM
  #23  
ChiapasFixed
hipster traffic dodger
 
ChiapasFixed's Avatar
 
Join Date: Dec 2007
Posts: 596

Bikes: IRO Mark V Pro, home made bamboo track bike, eddy merckx corsa extra, Airnimal Joey commute, UGADA Tikit

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
skidding is a good way to stop a fixie fast when you have to... I recommend learning how to do it. Then again, the front brake is usually sufficient, and will stop you faster.
ChiapasFixed is offline  
Old 08-31-09, 04:00 PM
  #24  
ddez
Senior Member
 
Join Date: Jul 2009
Location: Alberta,Canada.
Posts: 800
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by Lewis Butler View Post
Interesting you ask, ECB. These parts were floating around on the bottom of my bike box when I took delivery of it. I e-mailed Brompton tech support as I wasn't sure, here is their response:

"This disc is fitted to E-Type (bikes with no mudguards) bikes to stop the front brake cable contacting the tyre when the bars are turned."
I was getting a squeaking sound when turning to the right all the time.Turns out it was my brake cable rubbing on that little disc.Was hard to find actually,who would of thought that would cause a loud squeak?I rubbed a tiny bit of grease on disc,very thin it cured problem.

Last edited by ddez; 08-31-09 at 04:02 PM. Reason: redundant wording.
ddez is offline  
Old 09-01-09, 05:25 AM
  #25  
griftereck
Senior Member
 
Join Date: Jun 2008
Location: angus scotland
Posts: 600

Bikes: Grifter BSA 20

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Im thinking of welding cable stops to the top and bottom of my folding bikes handle post.
so theres not so much cable outer flapping about. Would use steel tube from bars to stops instead of the cable outer.
will do it when Ive got more practice welding.

would be a good thing to put cable stops on this Brompton. Seems like the cable would rub on the main tube and the tyre as it is
griftereck 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.