Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.


Retrofit a new chain ring
#1
I have a recumbent bike with a Durabi crankset 32/43/52 TX 165mm. I would like to be able to ride up hills a little more easily. Is it possible to replace the 32 with a 27? How difficult is this and what other considerations are involved in changing this chain ring?

  Reply
#2
Firstly you need to know the "BCD" (bolt circle diameter) of the crankset.
http://sheldonbrown.com/gloss_bo-z.html#bcd
The BCD can also be measured from the centre of the crankpin to the centre of a mounting bolt x 2 = diameter.
Probably the smallest chainring that will fit yours is 30T. A 27T may have the mounting holes nearer the centre.<br />
You would have to change the whole crankset if this is the case or optionally put a bigger cassette at the back.?<br />
If you do decide to fit a new crankset then also consider longer (170/172/175mm) cranks.<br />
This will give you a bit extra torque but will depend on your leg length etc.

Ride hard or ride home alone!
  Reply


Possibly Related Threads...

Forum Jump:

[-]
10 Latest Posts
I got new Tioga FASTR X Tires (Ask Me An...
Today 03:18 PM
Are You Riding the TDF
Today 12:20 PM
Tour de FRANCE 2025
Today 09:52 AM
What are the pros and cons of using a 26...
Today 09:46 AM
The great thing about trikes
Today 09:27 AM
Japanese Bike Brands
Today 08:27 AM
Continued learnings from bikepacking
Yesterday 11:34 PM
Gandolfi "Super" model 1985-86 racing bi...
07-04-2025 01:33 PM
How I used to clean my bike
07-03-2025 04:43 PM
Cassette shifting Problem
07-03-2025 02:51 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. GirishH
23 posts
no avatar 2. meamoantonio
17 posts
no avatar 3. Flowrider
17 posts
no avatar 4. Jesper
14 posts
no avatar 5. enkei
13 posts