Chain conversion
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Joined: Dec 2005
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From: poway
The 52/24 is 2.166 to 1
Stock belt 70/32 is 2.188.
The 2 ratios are very close.
I prefer 49/23 (2.130) as the chain is always a even number of rollers so the sprockets wear more evenly. Not sure it makes much difference tho.
Stock belt 70/32 is 2.188.
The 2 ratios are very close.
I prefer 49/23 (2.130) as the chain is always a even number of rollers so the sprockets wear more evenly. Not sure it makes much difference tho.
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With even number chain links and odd number sprocket teeth every roller of the chain will visit every groove in the sprocket. But with even number sprocket teeth each roller will be exclusively meeting every second groove. Right?
Seasoned HDF Member
Joined: Dec 2005
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From: poway
I had to think a while before I understood this (or at least I think I do..)
With even number chain links and odd number sprocket teeth every roller of the chain will visit every groove in the sprocket. But with even number sprocket teeth each roller will be exclusively meeting every second groove. Right?
With even number chain links and odd number sprocket teeth every roller of the chain will visit every groove in the sprocket. But with even number sprocket teeth each roller will be exclusively meeting every second groove. Right?
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Joined: Mar 2009
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From: Niles Canyon Ca.
Go play with the calculator tools on this site, educational and no guessing.
http://www.nightrider.com/biketech/calc_gearratios.htm
http://www.nightrider.com/biketech/calc_gearratios.htm
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,990
Likes: 8,064
From: poway
Go play with the calculator tools on this site, educational and no guessing.
http://www.nightrider.com/biketech/calc_gearratios.htm
http://www.nightrider.com/biketech/calc_gearratios.htm
I wouldn't use that one.. Too many errors.. Someone needs to clean it up. And you have to enter the data manually.
Use this one..
http://www.bigboyzcycles.com/
The gearing section..
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Joined: Sep 2022
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From: Florida
I had to think a while before I understood this (or at least I think I do..)
With even number chain links and odd number sprocket teeth every roller of the chain will visit every groove in the sprocket. But with even number sprocket teeth each roller will be exclusively meeting every second groove. Right?
With even number chain links and odd number sprocket teeth every roller of the chain will visit every groove in the sprocket. But with even number sprocket teeth each roller will be exclusively meeting every second groove. Right?
if it’s a 1 to 1 final gear I like running 24 motor, 23t trannys and a 47t rear, sometimes with enough stroker power, I run a 46t rear. This combination allowed me to run 3 gears through the quarter with a 4 speed in my Shovel at 112mph and high 11 second ET’s. Left the 4rth gear like an over drive. Awesome street power like that.
Last edited by Rains2much; Jan 6, 2025 at 03:22 PM.
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Road Master
Joined: Feb 2018
Posts: 912
Likes: 647
From: west coast
Repeat contact numbers are a matter of the the tooth count on both sprockets AND the chain length. I got it wrong once (before I knew that) when I changed the gearing on a Ducati and got noise, vibration and very rapid wear....all that from dropping one tooth on the countershaft sprocket.
Gearing Commander is a great free site to check out combinations, it will give you gearing, repeat contact numbers, and much more. Odds are that your proposed setup is good but check to make sure just in case.
https://www.gearingcommander.com/
Gearing Commander is a great free site to check out combinations, it will give you gearing, repeat contact numbers, and much more. Odds are that your proposed setup is good but check to make sure just in case.
https://www.gearingcommander.com/
Last edited by 08xl1200r; Jan 6, 2025 at 09:57 PM.
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Not completely correct unless say you were using 108 roller chain on a 54 tooth sprocket.. In that case each tooth would only see 2 different rollers.. If it was 106 then each tooth sees 1/2 the total rollers.. On say a 108 chain and a 53 tooth sprocket, each tooth sees all the rollers.
On the other hand a pulley with more teeth would see slightly less wear since each tooth is engaged fewer times for a certain distance travelled by the bike.
I doubt any of this makes a difference in practice
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Joined: Dec 2005
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From: poway
This is actually what I meant, but failed to verbalize correctly.
On the other hand a pulley with more teeth would see slightly less wear since each tooth is engaged fewer times for a certain distance travelled by the bike.
I doubt any of this makes a difference in practice
On the other hand a pulley with more teeth would see slightly less wear since each tooth is engaged fewer times for a certain distance travelled by the bike.
I doubt any of this makes a difference in practice