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

New: Take part in the June Giveaway for a brand new Merida Matts 6.5 bicycle


Cranksets: does size matter?
#1
I got screwed on a bike from CL. Knowing nothing about bikes I thought it would be a good idea to fix it up myself. I already got new handlebars which I do not think I will have trouble with but I need to put a new a chain and crank set on the bike. Also I would like to make it a single speed (not fixed gear) any help? Am I butchering the terminology? Thanks!

  Reply
#2
By size, do you mean number of teeth, length of the crankarm, offset from the frame?
Teeth count will affect your gearing on a single. I'd recommend riding it in a couple gears as is to test different combinations. Force yourself to stay in one gear to see what works best all around. Singles are great, but you do give up flexibility on gearing.
Arm length is generally a function of your height. Comon lengths are 165-175. I think if you have knee trouble, you may want to tend shorter. Longer gives you more leverage which may be good for a single.
Offset's a whole other issue I doubt you were think about. But let us know.

  Reply
#3
Here's an article about converting to a fixed. Not exactly what you're doing, but many of the same issues apply:
http://www.cicle.org/cicle_content/pivot/entry.php?id=1572

  Reply
#4
The article DaveM posted touched on this, but you also need to determine what kind of rear dropouts the bike has. Here is a guide here: http://www.sheldonbrown.com/gloss_dr-z.html#dropout
If they are vertical, you would need something called a chain tensioner. Horizontal ones do not really need this, because one can pull the wheel back and get better tension on the chain.

  Reply


Forum Jump:

[-]
10 Latest Posts
Merida Matts 6.5 Bicycle | June 2020
Today 08:17 PM
Fuji are suspending the sale of police b...
Today 06:23 PM
Buying my first road bike
Today 06:18 PM
Holes in my road tires
Today 06:07 PM
Dia Compe Versa C5 spring issues
Today 03:56 PM
Downtube Shifters on 1991 Miyata 721
Today 01:37 PM
Replacement components for 7-Speed Shima...
Today 10:23 AM
Vintage Road Bike Restoration HELP
Today 09:21 AM
Clunk noise from front cogs
Today 06:14 AM
Hello from south west Florida :)
Today 12:17 AM

[-]
Top 5 Posters This Month
no avatar 1. Jesper
28 posts
no avatar 2. CharleyFarley
18 posts
no avatar 3. Painkiller
16 posts
no avatar 4. Joe_W
12 posts
no avatar 5. G_M
9 posts