Bike Stuff > Two Wheel waffle for all
200mph Club
michael4012:
--- Quote from: HammyUK on November 10, 2013, 11:45:52 AM ---+1 on the front and -2/3 on the rear will leave you with the same gearing!
1 front tooth is roughly the same as 3 rear teeth.
--- End quote ---
you could just make the rear smaller but then you would have to reduce the length of chain by increasing the front & decreasing the rear you can keep the same length to a degree, the chain i have is up to about half adjustment so i can swap sprockets and use the same chain.
HammyUK:
--- Quote from: michael4012 on November 10, 2013, 04:54:20 PM ---
--- Quote from: HammyUK on November 10, 2013, 11:45:52 AM ---+1 on the front and -2/3 on the rear will leave you with the same gearing!
1 front tooth is roughly the same as 3 rear teeth.
--- End quote ---
you could just make the rear smaller but then you would have to reduce the length of chain by increasing the front & decreasing the rear you can keep the same length to a degree, the chain i have is up to about half adjustment so i can swap sprockets and use the same chain.
--- End quote ---
If you add one tooth on the front and take 2/3 off the rear YOU WILL NOT CHANGE THE GEARING !!?
You have to do one or the other or both but in greater differences!
You are going to have alter your chain or modify the swing arm to allow a massive amount of adjustment.
michael4012:
Hammy iv used this as a guide http://www.gearingcommander.com/ it is correct mate
HammyUK:
I know the site -I linked it here originally years ago!
You don't seem to get that front/rear together are not going to do much unless you go outside of the ratios.
17/41 is standard
16/41 is the same as 17/44
18/41 is the same as 17/38
The difference is in the chain length due to rear sprocket circumference.
The overall gearing in the above ratios won't affect your top speed though as it hasn't changed.
As an example - 16t front will take your top speed from an indicated 189 to 176. Fact - this was done at Brunters on a 10R.
A 44t rear made it 177. Basically the same.
You will want something like an 18t front AND the rear around 36/37 but you will have a huge loss in acceleration.
michael4012:
So + 1 front giving me 18t & 36-37t rear which is - 8 or 9 should do it then! The acceleration i don't really care about as im not restricted to a strip or runway & they'll be coming back off afterwards.
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