Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

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.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 08-21-17, 08:26 PM   #26
NYCDahon
Junior Member
Thread Starter
 
Join Date: Jul 2017
Bikes:
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Quote:
Originally Posted by NYCDahon View Post
39T Chainring
Nexus 7 HUB &
these 2 rear cogs

Gear----14T-vs-18T
-----------new---old
1---.632---33---26
2---.741---39---31
3---.843---44---35
4---.989---52---41
5---1.145--60---48
6---1.335--70---56
7---1.545--81---64
Ok -- I changed the rear gear to a 14T and after one week and 80 miles I LOVE the change -- but I would still like to go further -- maybe two gears harder yet again -- the front is now a 39T -- should I go with a 47T or a 52T? I added one of these to my old folder and really liked it.

Litepro MTB Folding Road Bike 170mm Crankset BCD 130mm Chainring 45/47/53/56/58T

Also what about a 175 vs 170?

http://www.ebay.com/itm/BICYCLE-BLAC...G/150867627148

http://www.ebay.com/itm/Folding-Road...-/262992043027

Last edited by NYCDahon; 08-21-17 at 08:58 PM.
NYCDahon is offline   Reply With Quote
Old 08-22-17, 01:18 AM   #27
badmother
Senior Member
 
badmother's Avatar
 
Join Date: Nov 2007
Bikes:
Posts: 3,717
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 254 Post(s)
Rule of thumb :

If you buy it too small (not enough teeth) there is nothing you can do- expect buying a bigger one.

If you buy it too big (too many teeth) you can just put a bigger cog at the rear to compensate.
badmother is offline   Reply With Quote
Old 08-23-17, 09:26 AM   #28
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 8
Posts: 28,444
Mentioned: 63 Post(s)
Tagged: 0 Thread(s)
Quoted: 2988 Post(s)
Sturmey/sachs/shimano 3 spline drivers , cogs start at 13t, 16t is the smallest dished cog.
fietsbob is offline   Reply With Quote
Old 08-23-17, 03:39 PM   #29
NYCDahon
Junior Member
Thread Starter
 
Join Date: Jul 2017
Bikes:
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)


Thanks!

I got a 54T 130 crank set winging its way from china -- and I now already have a new rear 14t cog -- so I will just see what happens once I get the 54T on -- I can always put back the 18T that was there -- or just get some other size.

Likely this new setup will have a top gear (7) that will be too hard unless downhill or with strong wind to my back -- since it will be 54T front and 14t rear with my Nexus 7 internal hub.

The crank arms I ordered are 170mm and the tires (Dahon) are 20" x 1.75"

Thanks again -- I am much happier with the new 14T cog on the back! I'm no longer just effortlessly spinning gears all the time.

Last edited by NYCDahon; 08-23-17 at 06:00 PM.
NYCDahon is offline   Reply With Quote
Old 08-23-17, 05:53 PM   #30
NYCDahon
Junior Member
Thread Starter
 
Join Date: Jul 2017
Bikes:
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Quote:
Originally Posted by fietsbob View Post
Sturmey/sachs/shimano 3 spline drivers , cogs start at 13t, 16t is the smallest dished cog.
Can you put a 13t on a Nexus 7 internal hub? I tried a 14t and it is great -had to remove the dust cover as stated in the Youtube I posted above. In any event - I am changing the front to 54t - should give me 2 more gears higher than what I now have.
NYCDahon is offline   Reply With Quote
Old 08-28-17, 10:52 AM   #31
Rick Imby
Senior Member
 
Join Date: Sep 2015
Bikes:
Posts: 587
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 208 Post(s)
My minimum high gear on a road bike with 2.0 tires would be 90 gear inches. If you are running narrower tires I would try to get to 100 gear inches.
Rick Imby is offline   Reply With Quote
Old 09-03-17, 08:05 PM   #32
NYCDahon
Junior Member
Thread Starter
 
Join Date: Jul 2017
Bikes:
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Quote:
Originally Posted by NYCDahon View Post

Thanks Rick
So with my 20" - 1.75 tires this new 54T crank might turn out to be just about right - the top gear might just be for down hills or when wind is at my back.

Last edited by NYCDahon; 09-04-17 at 05:19 AM.
NYCDahon 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 02:22 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    get answers from real people!
Click to start entering your question.
I HAVE A QUESTION