Sprocket Ratios: How much is too much?

3 replies [Last post]
billremnant
billremnant's picture
Offline
Joined: 06/27/2008
Points: 27

I am going to redo the drive wheel, braking system and add a free wheel clutch to my X-treme x-600.
(600 watt motor with max 3900 rpm [I only get 3180 rpm, tops]).

Right now I have a 12T to 71T sprocket ratio.

If I go with a 12T to 65T sprocket ratio, will that really throw things off?

What about 12T to 55T sprocket ratio?

What are the negatives of going away from the 12T to 71T setup I currently have?

I am trying to figure out how this will impact the engine, battery life, etc...

Thanks for feedback.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
LinkOfHyrule
LinkOfHyrule's picture
Offline
Joined: 10/17/2007
Points: 730
Re: Sprocket Ratios: How much is too much?

So you're wanting to go faster? Well, if the motor can handle it, then the tradeoff is, of course, only acceleration and range. The motor won't last as long, but generally people end up getting something new before that dies anyway.

If not, then the motor will fry. Checking it to see how hot it is after a ride at the new ratio would tell you how it's faring.

Personally, I'd overvolt it. Though if you don't have any place to put the extra batteries or can't afford a better chemistry, then I can see why you would prefer a sprocket change.

What exactly is that in your avatar, BTW? It looks like a hovercraft, which would almost automatically make it awesome.

__________________

The author of this post isn't responsible for any injury, disability or dismemberment, death, financial loss, illness, addiction, hereditary disease, or any other undesirable consequence or general misfortune resulting from use of the "information" contained herein.

billremnant
billremnant's picture
Offline
Joined: 06/27/2008
Points: 27
Re: Sprocket Ratios: How much is too much?

So if I went with a 65T instead of the 71T... That would barely add 1.5 mph of speed (according to my rough calculations).

Do you think going from 71T to 65T would significantly stress the engine or impact the range very much?

LinkOfHyrule wrote:

What exactly is that in your avatar, BTW? It looks like a hovercraft, which would almost automatically make it awesome.

Personal hovercraft (not electric yet) Levitating Hover Scooter

LinkOfHyrule
LinkOfHyrule's picture
Offline
Joined: 10/17/2007
Points: 730
Re: Sprocket Ratios: How much is too much?

Barely 1.5mph? I don't think it's going to stress the motor, though you'll probably see a slight decrease in range. Maybe a mile or two.

I knew I had seen that thing before. The gas engine is forgivable. The thrust fan is a real energy sink. ;)

__________________

The author of this post isn't responsible for any injury, disability or dismemberment, death, financial loss, illness, addiction, hereditary disease, or any other undesirable consequence or general misfortune resulting from use of the "information" contained herein.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
How to Live Well Without Owning a Car Save Money, Breathe Easier, and Get More Mileage Out of Life
Customize This