You are not logged in.

Compare Ratios of Gearing  RSS Feed

#126 2019-02-21 7:06am

El Gecko
Pro Member
From: The Great Lakes
Registered: 2012-10-01
Posts: 2905
Bikes: 8

Re: Compare Ratios of Gearing

repurpuss wrote:

Hobbes12 wrote:

repurpuss wrote:

So should i stick with a standard 39T chainring and run an 18T ? Most chainrings i want for my build are 43 or 44.

39/16 is the most common for 24’s...

43/18 might be about the same...

Ok thanks for the help.

That's a typo.  39/17 is the most common for cruisers.


Relax.
Balance.
Focus.

Offline

 

#127 2019-02-21 8:21am

Hobbes12
AdminDon’t Be a Wussy!
From: Lebanon Oregon
Registered: 2007-07-02
Posts: 37126
Bikes: 37
For Sale: 1
Website

Re: Compare Ratios of Gearing

El Gecko wrote:

repurpuss wrote:

Hobbes12 wrote:


39/16 is the most common for 24’s...

43/18 might be about the same...

Ok thanks for the help.

That's a typo.  39/17 is the most common for cruisers.

16t & 9t are the most common...


hobbes1278@gmail.com
Auburn Blue Max DB Dyno ELF Fit FA GT Haro Hawk Hutch JMC Mongoose National Pro Redline Roger DeCoster Schwinn SE WTP

Offline

 

#128 2019-02-21 8:28am

El Gecko
Pro Member
From: The Great Lakes
Registered: 2012-10-01
Posts: 2905
Bikes: 8

Re: Compare Ratios of Gearing

Hobbes12 wrote:

El Gecko wrote:

repurpuss wrote:

Ok thanks for the help.

That's a typo.  39/17 is the most common for cruisers.

16t & 9t are the most common...

Maybe on a 20" wheel.  For 24" wheels, standard is 39/17 which equals roughly 55 gear inches, same as 44/16 on a 20" wheel.  39/16 would be harder, but not impossible--like running a 47/16 on a 20".

Here's a quick comparison of the various gearing we've been discussing.

repurpuss has a 43T sprocket in the front with a 24 inch wheel, shown the last column

http://uploads.bmxmuseum.com/user-images/103998/gear_chart_0221195c6eefc7a2.jpg

Last edited by El Gecko (2019-02-21 10:37am)


Relax.
Balance.
Focus.

Offline

 

#129 2019-02-27 10:45am

repurpuss
Pro Member
From: Arlington, Tx
Registered: 2011-12-29
Posts: 371
Bikes: 1
For Sale: 1

Re: Compare Ratios of Gearing

El Gecko wrote:

Hobbes12 wrote:

El Gecko wrote:


That's a typo.  39/17 is the most common for cruisers.

16t & 9t are the most common...

Maybe on a 20" wheel.  For 24" wheels, standard is 39/17 which equals roughly 55 gear inches, same as 44/16 on a 20" wheel.  39/16 would be harder, but not impossible--like running a 47/16 on a 20".

Here's a quick comparison of the various gearing we've been discussing.

repurpuss has a 43T sprocket in the front with a 24 inch wheel, shown the last column

http://uploads.bmxmuseum.com/user-image … efc7a2.jpg

Ahh yes. Perfect because i actually scored a 92 Mach One parts bike and it has the exact 43T sprocket and spider I want. Thanks


Write that down!

Offline

 

#130 2019-09-09 2:16pm

Cramcan
Pro Member
From: Maui , HI
Registered: 2012-10-29
Posts: 473
Bikes: 5
Website

Re: Compare Ratios of Gearing

Wondering what the scientifical numbers would be with a 47 / 17 gearing runnin a 1.5 tire on a 20x1.5 rim compared to a 47/18 with a 2.125 tire on a 1.5 rim.


Looking for : Bomber #'s , NOS/good condition white (red ,white and blue decals) 50's Seiss bike light , Huffy Bandit tire , Camel Supercross stuff , spoke length for 3x lace pattern with mid 90's Kovachi hubs (flip-flop rear) and 20" ,1.5 Odyssey T-1000 rims.

Offline

 

#131 2019-09-09 4:01pm

El Gecko
Pro Member
From: The Great Lakes
Registered: 2012-10-01
Posts: 2905
Bikes: 8

Re: Compare Ratios of Gearing

Cramcan wrote:

Wondering what the scientifical numbers would be with a 47 / 17 gearing runnin a 1.5 tire on a 20x1.5 rim compared to a 47/18 with a 2.125 tire on a 1.5 rim.

The 47:17 on a 1.5 tire would give you an extra 1.5" or so of distance on each complete turn of the pedals. They are very close, and it really depends on the inflated diameters of both tires since they can vary so much. A knobby 2.125 and a smooth 1.5 would be nearly equal when you add a tooth to the freewheel for the bigger tire.

Last edited by El Gecko (2019-09-09 4:02pm)


Relax.
Balance.
Focus.

Offline

 

#132 2019-09-09 11:55pm

Cramcan
Pro Member
From: Maui , HI
Registered: 2012-10-29
Posts: 473
Bikes: 5
Website

Re: Compare Ratios of Gearing

Awesome! Thanks so much for the quick reply with the helpful info!


Looking for : Bomber #'s , NOS/good condition white (red ,white and blue decals) 50's Seiss bike light , Huffy Bandit tire , Camel Supercross stuff , spoke length for 3x lace pattern with mid 90's Kovachi hubs (flip-flop rear) and 20" ,1.5 Odyssey T-1000 rims.

Offline

 

Board footer

View Cart →