Best Gearing for circles?
07-01-2004, 10:56 PM
#1
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Best Gearing for circles?
I've been working on circles but stillhave stock gearing and I'm fed up with the bike stalling halfway through... think 2 down 10 up will be sufficient?
07-15-2004, 08:01 AM
#9
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Re: Best Gearing for circles?
Originally Posted by Got2josh
if the ratio turns out to be the same why would it make a difference wheather you wen t up in front or down in back?
Are you serious????
07-15-2004, 09:59 AM
#12
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Re: Best Gearing for circles?
Originally Posted by Emrock
why wouldnt he be he is right
I guess this means none of us need a bigger rear sprocket to gear our bikes, besides it would be a lot cheaper to just buy front sprockets would'nt it...???
07-15-2004, 01:04 PM
#13
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Re: Best Gearing for circles?
Originally Posted by Got2josh
if the ratio turns out to be the same why would it make a difference wheather you wen t up in front or down in back?
07-15-2004, 06:07 PM
#14
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Re: Best Gearing for circles?
I'm not a stunt rider but I took my fair share of physics classes.
When you change the direction that the top of the chain (from the top of the front sprocket to the top of the back sprocket) you change the effect of the chain's tension on the "lift" of the bike.
If the chain was parallel to the swingarm it would have zero effect, but if it was perpendicular to the swingarm, it would act alot like the "lift" you get with shaft driven bikes.
I think this is why lots of slow-wheelie stunters add TONS of teeth to the rear sprocket.....I'm guessing on this though.
(the hated ex-bike seller)
When you change the direction that the top of the chain (from the top of the front sprocket to the top of the back sprocket) you change the effect of the chain's tension on the "lift" of the bike.
If the chain was parallel to the swingarm it would have zero effect, but if it was perpendicular to the swingarm, it would act alot like the "lift" you get with shaft driven bikes.
I think this is why lots of slow-wheelie stunters add TONS of teeth to the rear sprocket.....I'm guessing on this though.
(the hated ex-bike seller)
Last edited by jdub1974; 07-15-2004 at 06:08 PM. Reason: more info
07-15-2004, 06:48 PM
#16
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Re: Best Gearing for circles?
gear ratio is changed by the difference between rotation of the counter shaft in relation to the rear wheel. Changing the front has more effect but only compared to the number of teeth changed. Down one in the front is equal to about 2-3 up in the rear but it isn't exact. It is the same effect. If you ride a bike with a down one and then a bike up three in the rear they will be almost the same. Sometimes the 3+ in the rear is a shorter ratio than down 1, sometimes the other way around.
07-15-2004, 06:50 PM
#17
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Re: Best Gearing for circles?
btw ,
the reason they don't make front sprockets smaller than a couple teeth down is because it makes the angle at which the chain has to bend and travel around the sprocket too tight and puts stress on the chain.
the reason they don't make front sprockets smaller than a couple teeth down is because it makes the angle at which the chain has to bend and travel around the sprocket too tight and puts stress on the chain.
07-15-2004, 07:27 PM
#18
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Re: Best Gearing for circles?
thats right... Correct me if I am wrong but if I recall correctly -1 in the front is equal to 2.54 teeth in the rear. So there would be no difference in the feel between two bikes with -2 in the front with a stock rear and the other one stock front and +5 in the back. ...unless one of the bikes was a turd.
Vortex makes a 13 tooth front for the gixxers which is -4... haha.. I have one. Basically the same as +10. It's a chain killer though.
Vortex makes a 13 tooth front for the gixxers which is -4... haha.. I have one. Basically the same as +10. It's a chain killer though.
07-16-2004, 04:13 AM
#20
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Re: Best Gearing for circles?
when you go down in the front the counter shaft spins faster and puts a lot more stress on the motor. If you just run all your gearing in the back its a smoother power due to the counter shaft not spinning as fast.
If you dont wanna be going through motors youll be smart and run all the gear in the rear
If you dont wanna be going through motors youll be smart and run all the gear in the rear
