Gear reduction/Puch

so I know I've seen this before but I've been searching forever and can't find it:

if you have_____RPM than you go_____MPH with a __front sprocket and a __rear sprocket with 17inch rear wheel or ___radius.

does anyone remember this post? and what the reduction is from the crank to front sprocket?

to answer the question how fast is 12000 RPM with 15x36 gearing?

Re: Gear reduction/Puch

Re: Gear reduction/Puch

Jason Luther /

do you have a V8 or something to reach 12, 000 rpm with that gearing?

Re: Gear reduction/Puch

A 50cc would reach 12k much easier than a V8. You'll probably have to take into consideration the gearboxes internal gearing also.

Re: Gear reduction/Puch

holy balls... your gila is turning 12k?

Re: Gear reduction/Puch

Start with what you know..

lets say the diameter of your wheel equals 22 inches total.

thats a circumference of 69.08 inches or 5.76 feet

one mile is 5280 feet

you your wheel needs to turn 916 times to travel one mile

or 916rpm would be one mile a minute or 60miles per hour

multiply that by your gear ratio of 2.4 and you get 2200rpm at your output shaft.

I don't know the internal gear reduction of puch so figure that out and multiply 2200 by that and you get crank RPMs @ 60mph. From there just change your varibles as you please

Re: Gear reduction/Puch

If it was 5:1 inside the case youd be spinning 11000 @ 60mph...

Re: Gear reduction/Puch

n0 acc0rding t0 my tiny tach, my p01ini is r0ckin 12k d0wn a big 10ng hi11! yay! I can't wait t0 get my gi1ard0ni ready, I'm takin it rea11y s10w with that beast

Re: Gear reduction/Puch

hey crack, is it 5:1? or is that just an example?

Re: Gear reduction/Puch

E50 of course

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I don't have a PC so I can't run Jaap calculator, can someone run it and check the speed with:___ Polease!

11000 RPM with 15

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sorry it wasn't 12k it was 11200 I missread the tiny tach, since it cuts 0ff the 1ast digit 0nce y0u pass 10000 is sh0ws 0000 then 11000 is 1000 and a mist00k 1200 f0r 12000 dang, maybe 0ne day I'11 reach 12k, but I sti11 wanna knw h0w fast I was g0ing

Re: Gear reduction/Puch

Yo Hips,

At 11,200, you were doing 92.64 km/h aka 57.56 mph.

Re: Gear reduction/Puch

yay! thanks!

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dang if I was g0ing 12k it w0ud've been 61.67 mph right? vr00m I wanna dd0 that indeed

Re: Gear reduction/Puch

Correct.

12k is where the party's at.

Re: Gear reduction/Puch

i think XmopedracerX mentioned it was 5.05:1 or something in that other post brought up earlier. I dunno i just finally got my first E-50 and haven't counted teeth yet.

Re: Gear reduction/Puch

yummmmmmm.

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still, how did you get 11,200 rpms with 15x36 gearing? that's insane!

Re: Gear reduction/Puch

big hi11, pantie h0se air fi1ter, c0nservitave1y p0rted, new whee1 bearings, and again it was a BIIIIGGGG hi11

Re: Gear reduction/Puch

and I'm natura1y aer0 dynamic

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