18 inch vrs. 20 inch diameter?

[tscracing]

For motocross racing, and general riding, how much do the 18 inch dia. tires affect handling compared to the 20 inch tires? Does it help that much to be a inch closer to the ground? This is with stock suspension. Thanks for the help.

[socalcracker2]

QUOTE (tscracing @ Apr 29 2008, 05:20 PM)

For motocross racing, and general riding, how much do the 18 inch dia. tires affect handling compared to the 20 inch tires? Does it help that much to be a inch closer to the ground? This is with stock suspension. Thanks for the help.

If you are going to be racing motocross then yes it does make a diiference. You will want to run 20in tires up front and 18in tires on the rear. The 2 inches will help to lower the center of gravity and you will be able to turn harder and faster. You will need to re-gear once you install 18's cuz the bike will max out at like 50mph.

[tscracing]

QUOTE (socalcracker2 @ Apr 30 2008, 09:48 PM)

If you are going to be racing motocross then yes it does make a diiference. You will want to run 20in tires up front and 18in tires on the rear. The 2 inches will help to lower the center of gravity and you will be able to turn harder and faster. You will need to re-gear once you install 18's cuz the bike will max out at like 50mph.

I already have a 15 tooth on the front. How low do I need to go in the rear to equal what I have now with 20 inch tires, if I go to 18 inch?

[socalcracker2]

QUOTE (tscracing @ Apr 30 2008, 10:38 PM)

I already have a 15 tooth on the front. How low do I need to go in the rear to equal what I have now with 20 inch tires, if I go to 18 inch?

If you have a stock motor then the 15t front should be fine.

[heckt]

i have 18's on rear and 19's on front, i have 15t sprocket and have the kx 450 cams in. it seems like it is reving out faster than it was with out the cams. should i get a different sprocket for the rear? any help?

[socalcracker2]

you may want to try going down 1 or 2 teeth in the rear. this will give you a little more top end speed and possibly broaden out the power band.

[jdubbz]

i have razr mx's 19 front 18 rear. i have the 15 front sprocket and a 37 rear it is deff alot better than just a 15 front, go down one in the rear..

[kfxnationalracer]

QUOTE (blastermaster5000 @ Nov 3 2008, 06:08 PM)

I got some 31 inch silverbacks and they r the STUFF!!!! for motocross!

lol i cant stop laughing. I peed myself like I do at the racetrack.