I recently put a 36 tooth sprocket on my MB. I got the 36 tooth because i heard its better?? But then my brother said the bigger the sprocket the faster it is? Does smaller amount of teeth mean more acceleration or something? Whats better Bigger/More teeth OR Smaller/less teeth? Will a 36 tooth sprocket make me less faster? Thanks, Longhorn6
Sprockets *How Many Teeth*??
- Thread starter longhorn6
- Start date
Board Track Racer
Member
Cabinfever1977
New Member
Larger rear sprocket =slower top speed/faster acceleration/pulls more weight/goes up hills better
smaller rear sprocket =Higher top speed/med acceleration/pulls less weight/goes up hills slower
my stock 44t sprocket takes off fast and tops out around 30mph or so and can go up hills good.
a 36t sprocket should give you a higher top speed and lower rpms out of your engine which will make your engine work less and it will make less noise,but will take off slower than with the larger one.
smaller rear sprocket =Higher top speed/med acceleration/pulls less weight/goes up hills slower
my stock 44t sprocket takes off fast and tops out around 30mph or so and can go up hills good.
a 36t sprocket should give you a higher top speed and lower rpms out of your engine which will make your engine work less and it will make less noise,but will take off slower than with the larger one.
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Venice Motor Bikes
Custom Builder / Dealer/Los Angeles
I'm all about 40T rear sprockets these days!!!
Nashville Kat
Well-Known Member
A smaller rear sprocket is a larger gear
while a smaller front sprocket is a smaller gear
a larger gear means a faster speed but less accelleration getting there
while a smaller gear bogs down less on hills
So there's no set answers- it's all dependent on the total weight it's pulling, the motor's (or riders) power, and the conditions of hilly or flat, smooth or rough
I have a 36 which works pretty well with smooth narrow tires, but I usually give it a little pedal assist when taking off, and it will bog down slightly on a steep very long hill-
I have no problems on the flat- I just got a kit that packed a 41, so I think the trend is going generally a bit smaller than 44.
Big wheels keep on turning!
while a smaller front sprocket is a smaller gear
a larger gear means a faster speed but less accelleration getting there
while a smaller gear bogs down less on hills
So there's no set answers- it's all dependent on the total weight it's pulling, the motor's (or riders) power, and the conditions of hilly or flat, smooth or rough
I have a 36 which works pretty well with smooth narrow tires, but I usually give it a little pedal assist when taking off, and it will bog down slightly on a steep very long hill-
I have no problems on the flat- I just got a kit that packed a 41, so I think the trend is going generally a bit smaller than 44.
Big wheels keep on turning!
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Creative Engineering
New Member
Longhorn,
You'll hear a lot of things...
I get many calls daily for advice on sprocket sizes.
A 40T sprocket is an excellent all-around size for a 26" bike with the Chinese In-frame engine.
I have made sprockets from 28T for the 2-cycle, up to 64T for the 4-cycle guys.
There are the guys who like to hill climb and weigh 200 lbs+ There are the 140 lb- guys who want to see how fast they can go.
Some of these engines are more powerful than others...final drive sprocket selection is part of the tuning process, and not an arbitrary number that can be pulled from a magicians hat. With this said: "Whats better Bigger/More teeth OR Smaller/less teeth?" is a loaded question...there are a number of factors that must be considered in order to arrive at the ideal final ratio.
In general, a larger rear sprocket will offer greater acceleration and a lower top speed...A smaller rear sprocket may give you a higher top speed, (If the engine has enough power to do it), and will definitely result in decreased acceleration.
In this respect our MB's are no different than motorcycles.
Jim
saetta
New Member
What size sprocket are any of us with 20" rear wheels running? I had a 44T on my Schwinn OCC. Great acceleration and torque, and winding out at 25 MPH. I replaced the 44T with a 36T and have not tested it yet. I like the overall performance of a 44T on my other bike with a 26" wheel. I want to match that performance with the 36T on my 20".
Creative Engineering
New Member
Using a large vernier caliper, I measured the "20" Occ to be 21 1/2" in diameter. If yours is the same , a 36T will give you nearly the exact same result as a 44T on a 26".
I've measured a lot of wheels with calipers. I've noticed that the wider the tire, the less accurate the diameter...(they are always larger in diameter than stated).
I have an Electra at the shop with Fatti-O tires sized 24 X 3.0...they actually measure 25 3/4".
The Schwinn Jaguar has 26 X 2.125 tires...they measure 26 1/4" in diameter.
Jim
momentummotorgroup
New Member
..so if I'm looking for quick acceleration and a good torque for climbing hills, a larger rear sprocket is the answer?
to answer you question:
yes!!!!!!!!
to answer you question:
yes!!!!!!!!
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Andyinchville1
Manufacturer/Dealer
Hi,
For Torque and low speed use go with a larger rear sprocket.
For Speed and fewer engine RPMs while cruising go with a smaller rear sprocket....
Got Torque? The first pic shows a stock 44T sprocket in comparison to our 80T Super Sprocket.
The second pic shows our 80T sprocket on the bottom, a stock 44T next, and on top is our
anodized 36T super Sprocket.
We can make sprockets from 17 T (direct to disc hub mount) to 80+ T for slow speed high torque use. (our most popular seller is the 34T Super Sprocket).
Andrew
PS - FYI - The 80 T sprocket is about 13" in diameter!
Sorry about the lo res pics....the orig pics were too large to upload....
For Torque and low speed use go with a larger rear sprocket.
For Speed and fewer engine RPMs while cruising go with a smaller rear sprocket....
Got Torque? The first pic shows a stock 44T sprocket in comparison to our 80T Super Sprocket.
The second pic shows our 80T sprocket on the bottom, a stock 44T next, and on top is our
anodized 36T super Sprocket.
We can make sprockets from 17 T (direct to disc hub mount) to 80+ T for slow speed high torque use. (our most popular seller is the 34T Super Sprocket).
Andrew
PS - FYI - The 80 T sprocket is about 13" in diameter!
Sorry about the lo res pics....the orig pics were too large to upload....
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momentummotorgroup
New Member
wow.. my question is how fast can you go on that 80 tooth, and what grade hill can it get ya up w/o standing on pedals to assist? Grand Rapids is partially built on a 500 year flood plane with the east side of the city perched on a 45 degree incline.. A lot of my prospective buyers of my builds shy away b/c they want to know the bike will make it up those hills without stalling out..
momentummotorgroup
New Member
i guess i should specify.. How fast on a stock 49cc Grubee with a rider avg. weight of 200lbs?
Andyinchville1
Manufacturer/Dealer
Hi Momentumtummotorgroup,
Generally a stock center mount Chinese engine will go about 28 MPH (give or take a little) with the stock 44T on a 26" wheel.
Given that the 80T is about 55% larger than the stock sprocket the top speed should be reduced about the same percentage....that would figure out to about 14.85 MPH give or take a little depending on how high you want to rev the engine (remember tho cruise RPM should be somewhat below max rpm because I doubt any engine would live very long when operated at redline all the time)....
I would think that that sprocket should be able to climb some pretty insane hills without pedaling....
The buyer of the sprocket said he wanted to ride tight trails in the woods and across bumpy fields so top end wasn't really big concern. His primary interest was slow speed operation.....As an interesting aside, we could have gone larger than 80 T but it did turn out he did want some speed!
In answer to your question concerning max speed with the average rider weight of 200 lbs I think max speed with the 80 T sprocket would be about 15 MPH....you would be RPM limited rather than power limited since the bike would be geared so low.
Andrew
Generally a stock center mount Chinese engine will go about 28 MPH (give or take a little) with the stock 44T on a 26" wheel.
Given that the 80T is about 55% larger than the stock sprocket the top speed should be reduced about the same percentage....that would figure out to about 14.85 MPH give or take a little depending on how high you want to rev the engine (remember tho cruise RPM should be somewhat below max rpm because I doubt any engine would live very long when operated at redline all the time)....
I would think that that sprocket should be able to climb some pretty insane hills without pedaling....
The buyer of the sprocket said he wanted to ride tight trails in the woods and across bumpy fields so top end wasn't really big concern. His primary interest was slow speed operation.....As an interesting aside, we could have gone larger than 80 T but it did turn out he did want some speed!
In answer to your question concerning max speed with the average rider weight of 200 lbs I think max speed with the 80 T sprocket would be about 15 MPH....you would be RPM limited rather than power limited since the bike would be geared so low.
Andrew
