im running a 15 tooth front sproket with the stock 40 in the rear...at the time i was running 20" 10 paddle and it seemed to be great!!,...but now i just upgraded to a 22" 9 paddle and havent ran it yet,...i was told that i should prolly play with the gearing a bit befor i run those tires...

what combo can i run on the stock chain and still have the hill racing abillity i had with the 20's??

 

i d probably go with a 14 front sprocket u can get 1 from rocky mountain pretty cheap unless u can find a 42 rear. that would be close to stock with a 15 and and 42 rear.

 

im currently running the 15 tooth,..have been for a few years now,...but that was on 20" tires...im running 22" tires now,...should i regear?...i havnt rant the bike on 22's yet as it sets now with the 15 front and stock rear

 

I ran mine with 15tooth sprocket and 22" haulers and couldn't have been happier. It was geared just right for me, it pulled awesome, I usually pulled every hill in 3rd.

 

If you are a heavier rider (too many twinkies, like me), consider 14/42 for 22". I've got the 14, but the 42 will be on order this summer. The 14/40 is good, but I rarely see the upper half of 5th gear anyway, so why not add a touch more acceleration with the 42 rear?

My dirt devils are a little taller than the average 22, so that may make some of the difference.

 

so let me get this right,....adding teeth to the rear lowers your gear ratio, just like droping teeth from the front?...

 

Yup, picture a mountain bicycle or a 10 speed. The Smaller the front & the larger the rear sprocket gives the engine more mechanical advantage (Making it easier to accelerate, but reducing top speed proportionately).

 

It is often more popular to change the front sprocket first, because it has more of an effect (per tooth) and it also is less likely to require a chain length modification (Adding or reducing links). Dropping a tooth on the front sprocket might reduce the diameter by fractions of an inch, where the rear would be more significant (to maintain the proper tooth to groove length for the chain).

A front sprocket may have a rough effect of 300-500rpm per tooth for a given speed, where the rear may be only 100-200rpm per tooth (Of course depends on the vehicle, tire size, etc.).

 

<div class="FTQUOTE"><begin quote>Originally posted by: joe dirt

im currently running the 15 tooth,..have been for a few years now,...but that was on 20" tires...im running 22" tires now,...should i regear?...i havnt rant the bike on 22's yet as it sets now with the 15 front and stock rear</end quote></div>

I currently run 15/40 with 21" paddles and that is just enough gear to get me moving up hills pretty good. If I were you I would run 14/40 with 22's and that should be about perfect. Plus a front sprocket change is a lot cheaper than a rear. Just something to think about.

 

<div class="FTQUOTE"><begin quote>Originally posted by: joe dirt
should i regear?</end quote></div>

Seems like I have to post this link for all of the new guys, but hey, that's what we're here for. It was done for me years ago and I'll return the favor, can't take the knowledge with me when I go...
Everyone has their own preference according to how and where they ride. I ran the 15/40 with 22's forever and loved it. UNTIL I rode someone else's with 15/42. Liked it much better. It's all a matter of personal taste. Experiment until you find what suits you, then when another new member comes aboard with a similar question post this link for him.
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