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.

Birdy thread

Old 03-18-19, 04:37 PM
  #1126  
secret_squirrel
Junior Member
 
Join Date: Jan 2019
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Nice to see. I reversed the bottom bracket spacer to get my 1mm clearance but apart from that and sram instead of shimano mine is pretty much the same.

Mine rattles though in the 36t cog.
secret_squirrel is offline  
Old 03-20-19, 04:28 AM
  #1127  
timo888
...poet...
 
timo888's Avatar
 
Join Date: Jul 2008
Location: Near the Twelve Mile Circle in Pennsylvania
Posts: 666

Bikes: Xootr Swift. Birdy BD-1.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
May I ask, what are a couple of decent ISO bottom brackets measuring 68mm x 127mm (for my older Birdy BD-1)?

I would like to move the chain out a bit since it's rubbing the left leg of the V-strut on the pivot arm when the chain is on the largest rear cog. The width of the BB on the bike now is 116mm. I'd rather not spend a lot of money, just looking for something sturdy and well made that will last. No need to shave grams.
timo888 is offline  
Old 03-20-19, 04:40 AM
  #1128  
glye
Member
 
glye's Avatar
 
Join Date: Jul 2018
Location: Norway
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Not what you're asking, but I think it's easier, and cheaper, to use chainring spacers instead. Lighter too. These can be had in various thicknesses from 1 mm and up. If you need as much as 3 mm, you may also need longer chainring bolts. Another advantage is you get to keep your current Q-factor, which is good unless you prefer more widely spaced pedals.

https://duckduckgo.com/?q=chainring+...ages&ia=images
glye is offline  
Old 03-21-19, 06:27 AM
  #1129  
timo888
...poet...
 
timo888's Avatar
 
Join Date: Jul 2008
Location: Near the Twelve Mile Circle in Pennsylvania
Posts: 666

Bikes: Xootr Swift. Birdy BD-1.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Originally Posted by glye View Post
Not what you're asking, but I think it's easier, and cheaper, to use chainring spacers instead. Lighter too. These can be had in various thicknesses from 1 mm and up. If you need as much as 3 mm, you may also need longer chainring bolts. Another advantage is you get to keep your current Q-factor, which is good unless you prefer more widely spaced pedals.

https://duckduckgo.com/?q=chainring+...ages&ia=images
Thanks for the suggestion and link.
timo888 is offline  
Old 03-22-19, 05:54 PM
  #1130  
50PlusCycling
Senior Member
 
50PlusCycling's Avatar
 
Join Date: Mar 2018
Posts: 218
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 90 Post(s)
Originally Posted by timo888 View Post
May I ask, what are a couple of decent ISO bottom brackets measuring 68mm x 127mm (for my older Birdy BD-1)?

I would like to move the chain out a bit since it's rubbing the left leg of the V-strut on the pivot arm when the chain is on the largest rear cog. The width of the BB on the bike now is 116mm. I'd rather not spend a lot of money, just looking for something sturdy and well made that will last. No need to shave grams.
I use a Shimano Dura Ace 7800 crankset with the hollowtech bottom bracket, it weighs about half what the original parts do, and is easy to install. 105 or Ultegra work just as well, and are still quite light. I have no issues with rubbing using an 11 speed rear sprocket.
50PlusCycling is offline  
Old 03-23-19, 01:55 AM
  #1131  
glye
Member
 
glye's Avatar
 
Join Date: Jul 2018
Location: Norway
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Originally Posted by 50PlusCycling View Post
(...) I have no issues with rubbing using an 11 speed rear sprocket.
Curious... do you use a roadbike cassette? They are not spaced as far inwards as 11-12 speed MTB cassettes are, so would be less likely to rub.
glye is offline  
Old 03-23-19, 11:15 PM
  #1132  
50PlusCycling
Senior Member
 
50PlusCycling's Avatar
 
Join Date: Mar 2018
Posts: 218
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 90 Post(s)
Originally Posted by glye View Post
Curious... do you use a roadbike cassette? They are not spaced as far inwards as 11-12 speed MTB cassettes are, so would be less likely to rub.

I run an XTR mountain bike cassette.
50PlusCycling is offline  
Old 03-24-19, 01:10 PM
  #1133  
timo888
...poet...
 
timo888's Avatar
 
Join Date: Jul 2008
Location: Near the Twelve Mile Circle in Pennsylvania
Posts: 666

Bikes: Xootr Swift. Birdy BD-1.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Originally Posted by 50PlusCycling View Post
I use a Shimano Dura Ace 7800 crankset with the hollowtech bottom bracket, it weighs about half what the original parts do, and is easy to install. 105 or Ultegra work just as well, and are still quite light. I have no issues with rubbing using an 11 speed rear sprocket.
I am pretty new to the world of bottom brackets and chain lines, and will have to read up about the hollowtech approach, where there's no spindle in the BB, rather it is part of the crank. With the hollowtech approach, what corresponds to a square taper BB's spindle width? How do you set the distance between the cranks? Are the crank shafts available in different widths?
timo888 is offline  
Old 03-24-19, 05:02 PM
  #1134  
50PlusCycling
Senior Member
 
50PlusCycling's Avatar
 
Join Date: Mar 2018
Posts: 218
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 90 Post(s)
Originally Posted by timo888 View Post
I am pretty new to the world of bottom brackets and chain lines, and will have to read up about the hollowtech approach, where there's no spindle in the BB, rather it is part of the crank. With the hollowtech approach, what corresponds to a square taper BB's spindle width? How do you set the distance between the cranks? Are the crank shafts available in different widths?

Yes, the hollow tech bottom brackets come in different widths, and use the same measurement system as square taper.
50PlusCycling is offline  
Old 04-02-19, 11:39 PM
  #1135  
al101
Newbie
 
Join Date: Apr 2019
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

Hi all,
Just found the forum/thread and Iím also a Birdy nut, currently have 4 in various conditionsÖ (1xBD1 2x2nd Gen & 1x3rd gen)

With Regards to the hub lighton the 3rd gen, yes itís not amazing, I did my own light mod on a 2nd gen before the 3rd was released and Iím still amazed with this light, you just need to point this thing low, it is SO bright, please see photo.

Ha looks like Iím going to have to post a few times before I can upload a photoÖ

Anyway nice to meet you all!
al101 is offline  
Old 04-03-19, 03:59 AM
  #1136  
al101
Newbie
 
Join Date: Apr 2019
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Just to add has anyone else managed to source titanium parts for the Birdy as well?
al101 is offline  
Old 04-05-19, 03:45 PM
  #1137  
timo888
...poet...
 
timo888's Avatar
 
Join Date: Jul 2008
Location: Near the Twelve Mile Circle in Pennsylvania
Posts: 666

Bikes: Xootr Swift. Birdy BD-1.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
I bought a Tange Seiki 68x127 BB for my BD-1, and installed the chain-ring on the outside of the spider, and now there's a good 6mm clearance, and even when the chain is on the largest cog there's no rub. The chain feels and acts perfectly fine, better than it had been with the 68x116 BB.
timo888 is offline  

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


Thread Tools
Search this Thread

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

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.