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


33T single speed crank?
#1
I saw this seller selling these single speed cranks on Ebay as per link below.

http://www.ebay.co.uk/itm/ALLOY-SINGLE-SPEED-BIKE-CRANKSET-SINGLE-3-32-CHAINSET-SQUARE-TAPER-FIT-CRANK-/281229806590?pt=UK_sportsleisure_cycling_bikeparts_SR&var=&hash=item417a9a4bfe

How do you go about choosing the correct number of teeth crank for your bike? Also why is he selling a 33t crank? Aren't cranks supposed to have an even number of teeth?

Thanks
  Reply
#2
The number of teeth on the chainring divided by the number of teeth on the cog at the back provides the gear ratio. There can be any integer number of teeth on either above some minimum; which around 9 teeth. Practical considerations push the minimum number of teeth higher. Even or odd does not matter. A common road double combination is 53 & 39 for an example.

Why 33T? - someone wanted it, and thought that there was sufficient market to offer more. Could be for BMX application.

Choosing - depends on fast you pedal, your strength to mass ratio, need for climbing, outside diameter of your drive tire. Here is a calculator: http://www.bikecalc.com/cadence_at_speed

You still have to determine your strength, need for climbing, etc.
Nigel
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
11,099
05-23-2016, 04:36 PM
Last Post: DaveM

Forum Jump:

[-]
10 Latest Posts
Cassette shifting Problem
Yesterday 11:43 PM
Gandolfi "Super" model 1985-86 racing bi...
Yesterday 02:34 PM
How I used to clean my bike
Yesterday 10:43 AM
Continued learnings from bikepacking
Yesterday 04:50 AM
What are the pros and cons of using a 26...
Yesterday 04:46 AM
I got new Tioga FASTR X Tires (Ask Me An...
Yesterday 01:31 AM
Attack // Force tire style narrow front ...
Yesterday 12:55 AM
The great thing about trikes
07-01-2025 11:10 AM
Doctors are Prescribing Cycling
07-01-2025 10:40 AM
How to improve cycling endurance? I've h...
06-30-2025 06:27 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
21 posts
no avatar 2. Flowrider
20 posts
no avatar 3. meamoantonio
14 posts
no avatar 4. rydabent
12 posts
no avatar 5. Jesper
11 posts