NEED EXPERTS: Tire Size and Top Speed

[Darius1502]

Ok...another question: My 86 Tri Z came stock with 21 inch tires...I am switching to 20 inch tires...how much will this reduce my top speed.

Any Experts??? Math wizzards?

[CHAINSAW]

Not enough to notice... Something that minute you will never notice.

[Wickedfinger]

Just go up a tooth on the Counter-shaft sprocket - use a Banshee aftermarket one. Personally, I put 22" D Devels on mine and I was really happy with the results. I don't think you will notice much of a difference anyway.

[Dynofox]

On my 85 Z I went with 22 inch turf tamers so I didn't lose any top speed or ground clearance.